New Products Catalog
February 2017
New Products Catalog
High Performance Analog ICs
LTC2944 60V Battery Gas Gauge with Temperature,
Voltage and Current Measurement
LTC2358-16 Buffered Octal, 16-Bit, 200ksps/Ch Differential
±10.24V ADC with 30VP-P Common Mode Range
LTC5566 300MHz to 6GHz Dual Programmable Gain
Downconverting Mixer
LTM4636 40A DC/DC µModule Regulator
LTC3119 18V, 5A Synchronous Buck-Boost DC/DC Converter
LT8390 60V Synchronous 4-Switch Buck-Boost Controller
with Spread Spectrum
Contents
Amplifiers
LTC®6261/LTC6262/LTC6263 30MHz, 240µA Power Efficient Rail-to-Rail I/O Op Amps......................................................................................1
Coulomb Counter
LTC2944 60V Battery Gas Gauge with Temperature, Voltage and Current Measurement......................................................................................3
Data Converters
LTC2310-12 12-Bit + Sign, 2Msps Differential Input ADC with Wide Input Common Mode Range......................................................................4
LTC2310-14 14-Bit + Sign, 2Msps Differential Input ADC with Wide Input Common Mode Range......................................................................5
LTC2320-16 Octal, 16-Bit, 1.5Msps/Ch Simultaneous Sampling ADC..................................................................................................................6
LTC2341-16 Dual, 16-Bit, 666ksps/Ch Differential SoftSpan™ ADC with Wide Input Common Mode Range.......................................................7
LTC2341-18 Dual, 18-Bit, 666ksps/Ch Differential SoftSpan ADC with Wide Input Common Mode Range..........................................................8
LTC2358-16 Buffered Octal, 16-Bit, 200ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range...................................................9
LTC2374-16 16-Bit, 1.6Msps, 8-Channel SAR ADC with 96dB SNR...................................................................................................................10
LTC2512-24 24-Bit Oversampling ADC with Configurable Flat Passband Digital Filter.......................................................................................11
High Frequency
LTC5566 300MHz to 6GHz Dual Programmable Gain Downconverting Mixer....................................................................................................12
Interface
LTM®2885 6500VRMS Isolated RS485/RS422 µModule® Transceiver + Power ...................................................................................................13
LTM2887 SPI/Digital or I2C µModule Isolator with Dual Adjustable 5V Regulators............................................................................................14
Power over Ethernet Controller
LTC4279 Single Port PoE/PoE+/LTPoE++® PSE Controller..................................................................................................................................16
μModule Regulators
LTM4636 40A DC/DC µModule Regulator...........................................................................................................................................................17
LTM4647 30A DC/DC Step-Down µModule Regulator........................................................................................................................................18
Contents
Switching Regulators—Monolithic
LTC3119 18V, 5A Synchronous Buck-Boost DC/DC Converter...........................................................................................................................20
LT®8606 42V, 350mA Synchronous Step-Down Regulator with 2.5µA Quiescent Current.................................................................................21
LT8607 42V, 750mA Synchronous Step-Down Regulator with 2.5µA Quiescent Current...................................................................................22
LT8630 100V, 0.6A Synchronous Micropower Step‑Down High Efficiency Switching Regulator.......................................................................23
Switching Regulators—Controllers
LTC3897 PolyPhase® Synchronous Boost Controller with Input/Output Protection............................................................................................24
LT8390 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum............................................................................................25
LT8705A 80V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller.............................................................................................26
Design Notes
DN557 Low EMI LED Driver Features 2A, 40V, Integrated, Synchronous Switches for Automotive Lighting
DN558 Bidirectional DC/DC Regulator and Supercapacitor Charger
L, LT, LTC, LTM, Linear Technology, Burst Mode, Dust, Dust Networks, Eterna, FilterCAD, LDO+, Linduino, Linear Express, LTPoE++, LTpowerCAD, LTpowerPlanner, LTpowerPlay, LTspice, Manager-onChip, OPTI-LOOP, Over-The-Top, PolyPhase, Silent Switcher, SmartMesh, SWITCHER+, TimerBlox, µModule, the Linear logo and the Dust Networks logo are registered trademarks of Linear Technology
Corporation. Access Point Mote, Adaptive Power, Anyside, AP Mote, AutoResonant, Bat-Track, BodeCAD, C-Load, ClockWizard, Direct Flux Limit, DirectSense, Easy Drive, EZ204Sync, EZParallelSync,
EZSync, FilterView, FracNWizard, isoSPI, LinearView, LTBiCMOS, LTC6951Wizard, LTCMOS, LTP, Micropower SwitcherCAD, Mote-on-Chip, Multimode Dimming, No Latency ∆Σ, No Latency Delta-Sigma,
No RSENSE, Operational Filter, PanelProtect, ParallelSync, PLLWizard, PowerPath, PowerSOT, PScope, QuikEval, RH DICE Inside, RH MILDICE Inside, SafeSlot, SmartMesh IP, SNEAK-A-BIT, SoftSpan,
Stage Shedding, Super Burst, ThinSOT, Triple Mode, True Color PWM, UltraFast, Virtual Remote Sense, Virtual Remote Sensing, VLDO, VManager, VRS and the Isolator logo are trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Amplifiers
LTC6261/LTC6262/LTC6263
30MHz, 240µA Power Efficient
Rail-to-Rail I/O Op Amps
FEATURES
DESCRIPTION
Gain-Bandwidth Product: 30MHz
nn Low Quiescent Current: 240µA
nn Op Amp Drives Up to 1nF Capacitive Loads
nn Offset Voltage: 400µV Maximum
nn Rail-to-Rail Input and Output
nn Supply Voltage Range: 1.8V to 5.25V
nn Input Bias Current: 200nA Maximum
nn CMRR/PSRR: 100dB/95dB
nn Shutdown Current: 9µA Maximum
nn Operating Temperature Range: –40°C to 125°C
nn Single in 2mm × 2mm DFN Packages
nn Dual in 8-Lead MS8, MS10, TS0T-23,
2mm × 2mm DFN Packages
nn Quad in MS16 Package
The LTC6261/LTC6262/LTC6263 are single/dual/quad operational
amplifiers with low noise, low power, low supply voltage, and
rail-to-rail inputs and outputs. They are unity gain stable with
capacitive loads up to 1nF. They feature 30MHz gain-bandwidth
product, 7V/µs slew rate while consuming only 240µA of supply
current per amplifier operating on supply voltages ranging from
1.8V to 5.25V. The combination of low supply current, low supply
voltage, high gain-bandwidth product and low noise makes the
LTC6261 family unique among rail-to-rail input/output op amps
with similar supply current. These operational amplifiers are
ideal for low power and low noise applications.
nn
For applications that require power-down, the LTC6261 in
2mm × 2mm DFN and LTC6262 in MSOP-10 packages offer
shutdown which reduces the current consumption to 9µA maximum.
The LTC6261 family can be used as plug-in replacements for many
commercially available op amps to reduce power and improve
input/output range and performance.
APPLICATIONS
Micropower Active Filters
Portable Instrumentation
nn Battery or Solar Powered Systems
nn Automotive Electronics
nn
nn
LTC6261 Driving LTC2362 ADC
0
TOP VIEW
6 OUT
7
V–
+IN 2
V– 3
5 –IN
4 SHDN
DC PACKAGE
PACKAGE
6-LEAD
(2mm ×(2mm
2mm × 2mm
0.8mm)
PLASTIC DFN
6-LEAD
× 0.8mm)
PLASTIC DFN
–INA 2
–30
7 OUTB
9
V–
+INA 3
V–
–20
8 V+
OUTA 1
MAGNITUDE (dB)
V+ 1
6 –INB
5 +INB
4
DC
DCPACKAGE
PACKAGE
8-LEAD
(2mm ×(2mm
2mm ×× 0.8mm)
8-LEAD
2mm ×PLASTIC
0.8mm)DFN
PLASTIC DFN
LTC6261IDC
LTC6261HDC
VIN = –1dBFS, 5kHz
fS = 250ksps
SNR = 72dB
THD = –83.6dB
SFDR = 86dB
–10
TOP VIEW
–40
–50
–60
–70
–80
–90
LTC6262IDC
LTC6262HDC
–100
–110
–120
TOP VIEW
1
2
3
4
–
+
7 OUTB
6 –INB
5 +INB
TOP VIEW
OUTA
–INA
+INA
V–
1
2
3
4
–
+
8
7
6
5
+
–
+
–
OUTA
–INA
+INA
V–
8 V+
V+
OUTB
–INB
+INB
TS8
PACKAGE
TS8 PACKAGE
8-LEAD PLASTIC
PLASTIC TSOT-23
8-LEAD
TSOT-23
MS8
PACKAGE
MS8 PACKAGE
8-LEAD PLASTIC
8-LEAD
PLASTICMSOP
MSOP
LTC6262ITS8
LTC6262HTS8
LTC6262IMS8
LTC6262HMS8
1
2
3
4
5
–
+
+
–
OUTA
–INA
+INA
V–
SHDNA
10
9
8
7
6
V+
OUTB
–INB
+INB
SHDNB
–
+
+
–
+
–
TOP VIEW
1
2
3
4
5
6
7
8
+
–
16
15
14
13
12
11
10
9
MS PACKAGE
MS
PACKAGE
10-LEAD PLASTIC
10-LEAD
PLASTICMSOP
MSOP
MS
PACKAGE
MS PACKAGE
16-LEAD PLASTIC
16-LEAD
PLASTICMSOP
MSOP
LTC6262IMS
LTC6262HMS
LTC6263IMS
LTC6263HMS
10
20
30
40
FREQUENCY (kHz)
50
60
626123 TA01b
Low Power, Low Distortion ADC Driver
CF1
10pF
RF1
1.74k
TOP VIEW
OUTA
–INA
+INA
V+
+INB
–INB
OUTB
NC
0
OUTD
–IND
+IND
V–
+INC
–INC
OUTC
NC
RF2
2.74k
3.3V
–
LTC6261
IN
3.3V
+
U1
RFILT
100Ω
VDD
OUT
CFILT
10nF
AIN
VREF
LTC2362
GND
CS
SDO
SCK
OVDD
626123 TA01a
1
60V Battery Gas Gauge
The LTC®2944 multicell battery gas gauge makes direct measurements of 3.6V to 60V battery stacks. Absolutely no level shifting
circuitry is required to interface with multicell voltages, minimizing current consumption and preserving measurement accuracy.
The LTC2944 is a true high voltage gas gauge that measures charge, voltage, current and temperature to within 1% accuracy —
all of the essential parameters required to accurately assess battery state of charge (SOC).
Total Charge Error vs
Differential Sense Voltage
Features
n
n
n
n
n
n
n
Measures Accumulated Battery Charge and Discharge
3.6V to 60V Operating Range for Multicell Applications
16-Bit ADC Measures Voltage, Current and Temperature
1% Charge, Voltage, Current and Temperature Accuracy
I2C/SMBus Interface
Configurable Alert Output/Charge Complete Input
Quiescent Current <150µA
Small 8-Pin 3mm × 3mm DFN Package
2.0
VSENSE+ = 30V
1.5
CHARGE ERROR (%)
n
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
Battery Gas Gauges and Power Monitors
Interface
Integrated
Sense
Resistor
LTC2941/LTC2941-1
2.7 to 5.5
I 2C
–/1A
•
LTC2942/LTC2942-1
2.7 to 5.5
I 2C
–/1A
•
LTC2943/LTC2943-1
3.6 to 20
I
2C
–/1A
LTC2944
3.6 to 60
I2C
LTC4151
7 to 80
I2C
LTC2945
0 to 80
I2C
LTC2946
0 to 100
I2C
LTC2947
0 to 15
2C
LTC4150
2.7 to 8.5
I
Interrupt
100
Measures
Energy
•
30A
10
VSENSE (mV)
Operating
Range (V)
Part Number
1
0.1
•
Charge
Power
Voltage
Current
•
Temperature
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
L, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Coulomb Counter
LTC2944
60V Battery Gas Gauge with Temperature,
Voltage and Current Measurement
FEATURES
DESCRIPTION
Measures Accumulated Battery Charge and Discharge
nn 3.6V to 60V Operating Range for Multiple Cells
nn 14-Bit ADC Measures Voltage, Current and Temperature
nn 1% Voltage, Current and Charge Accuracy
nn ±50mV Sense Voltage Range
nn High Side Sense
nn I2C Interface/SMBus Interface
nn General Purpose Measurements for Any Battery
Chemistry and Capacity
nn Configurable Alert Output/Charge Complete Input
nn Quiescent Current Less Than 150µA
nn Small 8-Lead 3mm × 3mm DFN Package
The LTC2944 measures battery charge state, battery voltage,
battery current and its own temperature in portable product
applications. The wide input voltage range allows use with
multicell batteries up to 60V. A precision coulomb counter
integrates current through a sense resistor between the battery’s
positive terminal and the load or charger. Voltage, current and
temperature are measured with an internal 14-bit No Latency ΔΣ™
ADC. The measurements are stored in internal registers accessible
via the onboard I2C/SMBus Interface.
nn
The LTC2944 features programmable high and low thresholds
for all four measured quantities. If a programmed threshold is
exceeded, the device communicates an alert using either the
SMBus alert protocol or by setting a flag in the internal status
register. The LTC2944 requires only a single low value sense
resistor to set the measured current range.
APPLICATIONS
Electric and Hybrid Electric Vehicles
nn Power Tools
nn Electric Bicycles, Motorcycles, Scooters
nn High Power Portable Equipment
nn Photo Voltaics
nn Backup Battery Systems
nn
Total Charge Error vs
Differential Sense Voltage
3
2
1
GND
2
GND
3
SCL
4
CHARGE ERROR (%)
TOP VIEW
SENSE+
8 SENSE–
9
VSENSE+ = 3.6V TO 60V
7 GND
6 ALCC
5 SDA
1
0
–1
–2
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
LTC2944CDD
LTC2944IDD
–3
0.1
1
10
100
VSENSE (mV)
2944 TA01b
1A
LOAD
CHARGER
3.3V
1µF
2k
2k
LTC2944
2k
VDD
ALCC
µP
SDA
SENSE+
SENSE–
SCL
GND
RSENSE
50mΩ
+
MULTICELL
Li-ION
2944 TA01a
3
Data Converters
LTC2310-12
12-Bit + Sign, 2Msps Differential Input ADC
with Wide Input Common Mode Range
FEATURES
DESCRIPTION
2Msps Throughput Rate
nn ±1LSB INL Guaranteed
nn Guaranteed 12-Bit, No Missing Codes
nn 8V
P-P Differential Inputs with Wide Input
Common Mode Range
nn 73dB SNR (Typ) at f
IN = 500kHz
nn –85dB THD (Typ) at f
IN = 500kHz
nn No Cycle Latency
nn Guaranteed Operation –40°C to 125°C
nn Single 3.3V or 5V Supply
nn Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal
Reference with 1.25V External Reference Input
nn 1.8V to 2.5V I/O Voltages
nn CMOS or LVDS SPI-Compatible Serial I/O
nn Power Dissipation 35mW at V
DD = 5V (Typ)
nn Small 16-Lead (4mm × 5mm) MSOP Package
The LTC2310-12 is a low noise, high speed 12-bit + sign successive
approximation register (SAR) ADC with differential inputs and
wide input common mode range. Operating from a single 3.3V or
5V supply, the LTC2310-12 has an 8VP-P differential input range,
making it ideal for applications which require a wide dynamic range
with high common mode rejection. The LTC2310-12 achieves
±1LSB INL guaranteed, no missing codes at 12 bits and 73dB
SNR typical.
nn
The LTC2310-12 has an onboard low drift (20ppm/°C max) 2.048V
or 4.096V temperature compensated reference and provides an
external 1.25V buffered reference input. The LTC2310-12 also
has a high speed SPI-compatible serial interface that supports
CMOS or LVDS. The fast 2Msps throughput with no cycle latency
makes the LTC2310-12 ideally suited for a wide variety of high
speed applications. The LTC2310-12 dissipates only 35mW with
a 5V supply and offers nap and sleep modes to reduce the power
consumption for further power savings during inactive periods.
APPLICATIONS
High Speed Data Acquisition Systems
Communications
nn Remote Data Acquisition
nn Imaging
nn Optical Networking
nn Automotive
nn Multiphase Motor Control
nn
32k Point FFT fSMPL = 2Msps, fIN = 500kHz
nn
0
AMPLITUDE (dBFS)
TOP VIEW
GND
REFIN
REFOUT
VDD
GND
AIN+
AIN–
GND
1
2
3
4
5
6
7
8
17
GND
16
15
14
13
12
11
10
9
SNR = 73.6dB
THD = –87dB
SINAD = 73.4dB
SFDR = 92dB
–20
SCK+
SCK–
SDO+
SDO–
–40
–60
–80
–100
–120
OVDD
GND
CMOS/LVDS
CNV
–140
0
0.2
0.4
0.6
FREQUENCY (MHz)
0.8
1.0
231012 TA01b
MSE PACKAGE
16-LEAD (4mm × 5mm) PLASTIC MSOP
LTC2310CMSE-12
LTC2310IMSE-12
LTC2310HMSE-12
3.3V OR 5V
DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN –
VDD
ARBITRARY
0V
VDD
VDD
1µF
DIFFERENTIAL
25Ω
VDD
VDD REFOUT
LTC2310-12
0V
BIPOLAR
AIN+
REFIN
47pF
UNIPOLAR
25Ω
10µF
SDO
SCK
AIN–
CMOS/LVDS
0V
0V
10µF
GND
LVDS OR CMOS
CONFIGURABLE
I/O
CNV
OVDD
1.8V TO 2.5V
1µF
231012 TA01a
4
Data Converters
LTC2310-14
14-Bit + Sign, 2Msps Differential Input ADC
with Wide Input Common Mode Range
FEATURES
DESCRIPTION
2Msps Throughput Rate
nn ±2.5LSB INL Guaranteed
nn Guaranteed 14-Bit, No Missing Codes
nn 8V
P-P Differential Inputs with Wide Input
Common Mode Range
nn 82dB SNR (Typ) at f
IN = 500kHz
nn –93dB THD (Typ) at f
IN = 500kHz
nn No Cycle Latency
nn Guaranteed Operation –40°C to 125°C
nn Single 3.3V or 5V Supply
nn Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal
Reference with 1.25V External Reference Input
nn 1.8V to 2.5V I/O Voltages
nn CMOS or LVDS SPI-Compatible Serial I/O
nn Power Dissipation 35mW at V
DD = 5V (Typ)
nn Small 16-Lead (4mm × 5mm) MSOP Package
The LTC2310-14 is a low noise, high speed 14-bit + sign successive
approximation register (SAR) ADC with differential inputs and
wide input common mode range. Operating from a single 3.3V or
5V supply, the LTC2310-14 has an 8VP-P differential input range,
making it ideal for applications which require a wide dynamic range
with high common mode rejection. The LTC2310‑14 achieves
±2.5LSB INL guaranteed, no missing codes at 14 bits and 82dB
SNR typical.
nn
The LTC2310-14 has an onboard low drift (20ppm/°C max) 2.048V
or 4.096V temperature compensated reference and provides an
external 1.25V buffered reference input. The LTC2310-14 also
has a high speed SPI-compatible serial interface that supports
CMOS or LVDS. The fast 2Msps throughput with no cycle latency
makes the LTC2310-14 ideally suited for a wide variety of high
speed applications. The LTC2310-14 dissipates only 35mW with
a 5V supply and offers nap and sleep modes to reduce the power
consumption for further power savings during inactive periods.
APPLICATIONS
High Speed Data Acquisition Systems
Communications
nn Remote Data Acquisition
nn Imaging
nn Optical Networking
nn Automotive
nn Multiphase Motor Control
nn
32k Point FFT fSMPL = 2Msps, fIN = 500kHz
nn
0
AMPLITUDE (dBFS)
TOP VIEW
GND
REFIN
REFOUT
VDD
GND
AIN+
AIN–
GND
1
2
3
4
5
6
7
8
17
GND
16
15
14
13
12
11
10
9
SNR = 82dB
THD = –93dB
SINAD = 81.7dB
SFDR = 97dB
–20
SCK+
SCK–
SDO+
SDO–
–40
–60
–80
–100
–120
OVDD
GND
CMOS/LVDS
CNV
–140
0
0.2
0.4
0.6
FREQUENCY (MHz)
0.8
1.0
231014 TA01b
MSE PACKAGE
16-LEAD (4mm × 5mm) PLASTIC MSOP
LTC2310CMSE-14
LTC2310IMSE-14
LTC2310HMSE-14
3.3V OR 5V
DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN –
VDD
ARBITRARY
0V
VDD
VDD
1µF
DIFFERENTIAL
25Ω
VDD
VDD REFOUT
LTC2310-14
0V
BIPOLAR
AIN+
REFIN
47pF
UNIPOLAR
25Ω
10µF
SDO
SCK
AIN–
CMOS/LVDS
0V
0V
10µF
GND
LVDS OR CMOS
CONFIGURABLE
I/O
CNV
OVDD
1.8V TO 2.5V
1µF
231014 TA01a
5
Data Converters
LTC2320-16
Octal, 16-Bit, 1.5Msps/Ch
Simultaneous Sampling ADC
FEATURES
DESCRIPTION
1.5Msps/Ch Throughput Rate
nn Eight Simultaneously Sampling Channels
nn Guaranteed 16-Bit, No Missing Codes
nn 8V
P-P Differential Inputs with Wide Input
Common Mode Range
nn 82dB SNR (Typ) at f
IN = 500kHz
nn –90dB THD (Typ) at f
IN = 500kHz
nn Guaranteed Operation to 125°C
nn Single 3.3V or 5V Supply
nn Low Drift (20ppm/°C Max) 2.048V or
4.096V Internal Reference
nn 1.8V to 2.5V I/O Voltages
nn CMOS or LVDS SPI-Compatible Serial I/O
nn Power Dissipation 20mW/Ch (Typ)
nn Small 52-Lead (7mm × 8mm) QFN Package
The LTC2320-16 is a low noise, high speed octal 16‑bit successive
approximation register (SAR) ADC with differential inputs and
wide input common mode range. Operating from a single 3.3V or
5V supply, the LTC2320-16 has an 8VP-P differential input range,
making it ideal for applications which require a wide dynamic range
with high common mode rejection. The LTC2320-16 achieves
±2LSB INL typical, no missing codes at 16 bits and 82dB SNR.
nn
The LTC2320-16 has an onboard low drift (20ppm/°C max) 2.048V
or 4.096V temperature compensated reference. The LTC2320-16
also has a high speed SPI-compatible serial interface that supports
CMOS or LVDS. The fast 1.5Msps per channel throughput with
no latency makes the LTC2320-16 ideally suited for a wide variety
of high speed applications. The LTC2320-16 dissipates only
20mW per channel and offers nap and sleep modes to reduce
the power consumption to 26μW for further power savings during
inactive periods.
APPLICATIONS
High Speed Data Acquisition Systems
nn Communications
nn Optical Networking
nn Multiphase Motor Control
32k Point FFT fSMPL = 1.5Msps, fIN = 500kHz
AMPLITUDE (dBFS)
52 51 50 49 48 47 46 45 44 43 42 41
AIN6– 1
+
AIN6
40 SDO8/SDOD–
2
39
SDO7/SDOD+
GND 3
38 GND
AIN5– 4
37 OVDD
AIN5+ 5
36 SDO6/SDOC–
REFOUT3 6
35 SDO5/SDOC+
GND 7
33
SNR = 82.2dB
THD = –91.2dB
–20 SINAD = 81.8dB
SFDR = 94.7dB
–40
–60
–80
–100
–120
–140
34 CLKOUTEN/CLKOUT–
53
GND
REF 8
IN
0
SCK/SCK+
DNC/SCK–
VDD
REFOUT4
GND
AIN8–
AIN8+
GND
AIN7–
AIN7+
VDD
TOP VIEW
REFBUFEN
nn
0
0.1
0.2 0.3 0.4 0.5
FREQUENCY (MHz)
CLKOUT/CLKOUT+
AIN4– 10
10µF
31 OVDD
+
AIN4 11
30 SDO4/SDOB–
GND 12
29 SDO3/SDOB+
AIN3– 13
28 SDO2/SDOA–
AIN3+ 14
27 SDO1/SDOA+
GND
CMOS/LVDS
CNV
SDR/DDR
VDD
REFOUT1
AIN1+
GND
AIN1–
AIN2+
VDD
AIIN2–
15 16 17 18 19 20 21 22 23 24 25 26
TRUE DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN –
VDD
ARBITRARY
0V
VDD
0V
VDD
DIFFERENTIAL
VDD
AIN2+
S/H
AIN2–
AIN3+
S/H
AIN3–
AIN4+
S/H
AIN4–
0V
BIPOLAR
AIN1+
S/H
AIN1–
UNIPOLAR
0V
AIN5+
S/H
AIN5–
AIN6+
S/H
AIN6–
AIN7+
S/H
AIN7–
AIN8+
S/H
AIN8–
REF
EIGHT SIMULTANEOUS
SAMPLING CHANNELS
6
1µF
1.8V TO 2.5V
3.3V OR 5V
UKG PACKAGE
UKG
PACKAGE
52-LEAD(7mm
(7mm ×× 8mm)
QFN
52-LEAD
8mm)PLASTIC
PLASTIC
QFN
LTC2320CUKG-16
LTC2320IUKG-16
LTC2320HUKG-16
0.7
232016 TA01b
32 GND
REFOUT2 9
0.6
VDD
GND
MUX
16-BIT
SAR ADC
MUX
16-BIT
SAR ADC
GND
SDO1
SDO2
SDO3
SDO4
SDO5
SDO6
SDO7
SDO8
CLKOUT
SCK
LTC2320-16
MUX
OVDD
CMOS/LVDS
SDR/DDR
REFBUFEN
16-BIT
SAR ADC
CNV
MUX
16-BIT
SAR ADC
REFOUT1 REFOUT2 REFOUT3 REFOUT4
232016 TA01a
1µF
10µF
10µF
10µF
10µF
SAMPLE
CLOCK
Data Converters
LTC2341-16
Dual, 16-Bit, 666ksps/Ch Differential SoftSpan
ADC with Wide Input Common Mode Range
FEATURES
DESCRIPTION
666ksps per Channel Throughput
nn Two Simultaneous Sampling Channels
nn ±1.25LSB INL (Maximum)
nn Guaranteed 16-Bit, No Missing Codes
nn Differential, Wide Common Mode Range Inputs
nn Per Channel SoftSpan Input Ranges:
nn ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V
nn ±5V, 0V to 5V, ±2.5V, 0V to 2.5V
nn 93.4dB Single-Conversion SNR (Typical)
nn −114dB THD (Typical) at f
IN = 2kHz
nn 105dB CMRR (Typical) at f
IN = 200Hz
nn Rail-to-Rail Input Overdrive Tolerance
nn Guaranteed Operation to 125°C
nn Integrated Reference and Buffer (4.096V)
nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O
nn Internal Conversion Clock, No Cycle Latency
nn 74mW Power Dissipation (Typical)
nn 32-Lead (5mm × 5mm) QFN Package
The LTC2341-16 is a 16-bit, low noise 2-channel simultaneous
sampling successive approximation register (SAR) ADC with
differential, wide common mode range inputs. Operating from
a 5V supply and using the internal reference and buffer, both
channels of this SoftSpan ADC can be independently configured
on a conversion-by-conversion basis to accept ±4.096V, 0V to
4.096V, ±2.048V, or 0V to 2.048V signals. One channel may also
be disabled to increase throughput on the other channel.
nn
The wide input common mode range and 105dB CMRR of the
LTC2341-16 analog inputs allow the ADC to directly digitize a
variety of signals, simplifying signal chain design. This input signal
flexibility, combined with ±1.25LSB INL, no missing codes at
16 bits, and 93.4dB SNR, makes the LTC2341-16 an ideal choice
for many applications requiring wide dynamic range.
The LTC2341-16 supports pin-selectable SPI CMOS (1.8V to 5V)
and LVDS serial interfaces. Either one or two lanes of data output
may be employed in CMOS mode, allowing the user to optimize
bus width and throughput.
APPLICATIONS
Integral Nonlinearity vs
Output
Codeand
and
Channel
vs Output Code
Channel
Programmable Logic Controllers
nn Industrial Process Control
nn Medical Imaging
nn High Speed Data Acquisition
nn
1.00
0.75
0.50
INL ERROR (LSB)
SDO–/SDI
BUSY
CS
VDDLBYP
GND
VDD
GND
GND
TOP VIEW
32 31 30 29 28 27 26 25
0.25
0
–0.25
IN1– 1
24 SDO+
–0.50
IN1+ 2
23 SCKO–/SDO1
–0.75
GND 3
22 SCKO+/SCKO
GND 4
GND 5
IN0– 7
18 SCKI+/SDO0
17 SDI
8
SDI+
CNV
PD
LVDS/CMOS
REFBUF
GND
GND
5V
0.1µF
–
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm ×× 5mm) PLASTIC QFN
LTC2341CUH-16
LTC2341IUH-16
LTC2341HUH-16
0
16384
OUTPUT CODE
32768
234116 TA01b
19 SCKI–/SCKI
REFIN
–16384
20 GND
GND 6
IN0+
–1.00
–32768
21 OVDD
33
GND
±4.096V RANGE
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
ALL CHANNELS
5V
ARBITRARY
CMOS OR LVDS
I/O INTERFACE
FULLY
DIFFERENTIAL
5V
VDD
IN0+ S/H
IN0–
0V
5V
1.8V TO 5V
0.1µF
2.2µF
VDDLBYP
OVDD LVDS/CMOS
PD
LTC2341-16
0V
BIPOLAR
5V
16-BIT
SAR ADC
MUX
UNIPOLAR
IN1+ S/H
IN1–
0V
0V
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
Protected by U.S. Patents, including 7705765, 7961132, 8319673, 9197235.
REFBUF
TWO SIMULTANEOUS
SAMPLING CHANNELS
47µF
REFIN
GND
0.1µF
SDO0
SDO1
SCKO
SCKI
SDI
CS
BUSY
CNV
SAMPLE
CLOCK
234116 TA01a
7
Data Converters
LTC2341-18
Dual, 18-Bit, 666ksps/Ch Differential SoftSpan
ADC with Wide Input Common Mode Range
FEATURES
DESCRIPTION
666ksps per Channel Throughput
nn Two Simultaneous Sampling Channels
nn ±4LSB INL (Maximum)
nn Guaranteed 18-Bit, No Missing Codes
nn Differential, Wide Common Mode Range Inputs
nn Per Channel SoftSpan Input Ranges:
nn ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V
nn ±5V, 0V to 5V, ±2.5V, 0V to 2.5V
nn 95dB Single-Conversion SNR (Typical)
nn −114dB THD (Typical) at f
IN = 2kHz
nn 105dB CMRR (Typical) at f
IN = 200Hz
nn Rail-to-Rail Input Overdrive Tolerance
nn Guaranteed Operation to 125°C
nn Integrated Reference and Buffer (4.096V)
nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O
nn Internal Conversion Clock, No Cycle Latency
nn 74mW Power Dissipation (Typical)
nn 32-Lead (5mm × 5mm) QFN Package
The LTC2341-18 is an 18-bit, low noise 2-channel simultaneous
sampling successive approximation register (SAR) ADC with
differential, wide common mode range inputs. Operating from
a 5V supply and using the internal reference and buffer, both
channels of this SoftSpan ADC can be independently configured
on a conversion-by-conversion basis to accept ±4.096V, 0V to
4.096V, ±2.048V, or 0V to 2.048V signals. One channel may also
be disabled to increase throughput on the other channel.
nn
The wide input common mode range and 105dB CMRR of the
LTC2341-18 analog inputs allow the ADC to directly digitize a
variety of signals, simplifying signal chain design. This input signal
flexibility, combined with ±4LSB INL, no missing codes at 18 bits,
and 95dB SNR, makes the LTC2341-18 an ideal choice for many
applications requiring wide dynamic range.
The LTC2341-18 supports pin-selectable SPI CMOS (1.8V to 5V)
and LVDS serial interfaces. Either one or two lanes of data output
may be employed in CMOS mode, allowing the user to optimize
bus width and throughput.
APPLICATIONS
Integral Nonlinearity vs
Output Code and Channel
Programmable Logic Controllers
nn Industrial Process Control
nn Medical Imaging
nn High Speed Data Acquisition
nn
2.0
1.5
1.0
INL ERROR (LSB)
SDO–/SDI
BUSY
CS
VDDLBYP
GND
VDD
GND
GND
TOP VIEW
32 31 30 29 28 27 26 25
24 SDO+
IN1+ 2
23 SCKO–/SDO1
GND 3
22 SCKO+/SCKO
GND 4
21 OVDD
33
GND
IN0– 7
18 SCKI+/SDO0
IN0+ 8
17 SDI–
SDI+
CNV
LVDS/CMOS
PD
REFBUF
GND
9 10 11 12 13 14 15 16
GND
–0.5
–1.5
–2.0
–131072
–65536
0
65536
OUTPUT CODE
131072
234118 TA01b
19 SCKI–/SCKI
REFIN
0
20 GND
GND 6
UH PACKAGE
32-LEAD
32-LEAD (5mm
(5mm ×× 5mm) PLASTIC QFN
LTC2341CUH-18
LTC2341IUH-18
LTC2341HUH-18
5V
ARBITRARY
5V
0.1µF
0V
5V
1.8V TO 5V
0.1µF
2.2µF
CMOS OR LVDS
I/O INTERFACE
FULLY
DIFFERENTIAL
5V
VDD
IN0+ S/H
IN0–
VDDLBYP
OVDD LVDS/CMOS
PD
LTC2341-18
0V
BIPOLAR
5V
18-BIT
SAR ADC
MUX
UNIPOLAR
IN1+ S/H
IN1–
0V
0V
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
8
0.5
–1.0
IN1– 1
GND 5
±4.096V RANGE
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
ALL CHANNELS
REFBUF
TWO SIMULTANEOUS
SAMPLING CHANNELS
47µF
REFIN
GND
0.1µF
SDO0
SDO1
SCKO
SCKI
SDI
CS
BUSY
CNV
SAMPLE
CLOCK
234118 TA01a
Protected by U.S. Patents, including 7705765, 7961132, 8319673, 9197235.
Data Converters
LTC2358-16
Buffered Octal, 16-Bit, 200ksps/Ch Differential
±10.24V ADC with 30VP-P Common Mode Range
FEATURES
DESCRIPTION
200ksps per Channel Throughput
nn Eight Buffered Simultaneous Sampling Channels
nn 400pA/4nA Max Input Leakage at 85°C/125°C
nn ±1LSB INL (Maximum, ±10.24V Range)
nn Guaranteed 16-Bit, No Missing Codes
nn Differential, Wide Common Mode Range Inputs
nn Per Channel SoftSpan Input Ranges:
nn ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V
nn ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V
nn 94.2dB Single-Conversion SNR (Typical)
nn −111dB THD (Typical) at f
IN = 2kHz
nn 128dB CMRR (Typical) at f
IN = 200Hz
nn Rail-to-Rail Input Overdrive Tolerance
nn Integrated Reference and Buffer (4.096V)
nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O
nn Internal Conversion Clock, No Cycle Latency
nn 219mW Power Dissipation (27mW/Ch Typical)
nn 48-Lead (7mm x 7mm) LQFP Package
The LTC2358-16 is a 16-bit, low noise 8-channel simultaneous
sampling successive approximation register (SAR) ADC with
buffered differential, wide common mode range picoamp inputs.
Operating from a 5V low voltage supply, flexible high voltage
supplies, and using the internal reference and buffer, each channel
of this SoftSpan ADC can be independently configured on a
conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V,
±5.12V, or 0V to 5.12V signals. Individual channels may also be
disabled to increase throughput on the remaining channels.
nn
The integrated picoamp-input analog buffers, wide input common
mode range and 128dB CMRR of the LTC2358-16 allow the ADC
to directly digitize a variety of signals using minimal board space
and power. This input signal flexibility, combined with ±1LSB
INL, no missing codes at 16 bits, and 94.2dB SNR, makes the
LTC2358-16 an ideal choice for many high voltage applications
requiring wide dynamic range.
The LTC2358-16 supports pin-selectable SPI CMOS (1.8V to 5V)
and LVDS serial interfaces. Between one and eight lanes of data
output may be employed in CMOS mode, allowing the user to
optimize bus width and throughput.
APPLICATIONS
Programmable Logic Controllers
nn Industrial Process Control
nn Power Line Monitoring
nn Test and Measurement
nn
Integral Nonlinearity vs
Output Code and Channel
1.00
TOP VIEW
INL ERROR (LSB)
IN7+
IN7–
GND
VEE
GND
VDD
VDD
GND
VDDLBYP
CS
BUSY
SDI
0.50
48
47
46
45
44
43
42
41
40
39
38
37
IN6– 1
IN6+ 2
IN5– 3
IN5+ 4
IN4– 5
IN4+ 6
IN3– 7
IN3+ 8
IN2– 9
IN2+ 10
IN1– 11
IN1+ 12
0V
–10V
TRUE BIPOLAR
+10V
–0.75
–1.00
–32768
15V
0.1µF
0
16384
OUTPUT CODE
32768
5V
0.1µF
1.8V TO 5V
0.1µF
2.2µF
CMOS OR LVDS
I/O INTERFACE
FULLY
DIFFERENTIAL
+5V
0V
BUFFERS
IN0+
S/H
–
IN0
S/H
+10V
0V
–10V
–10V
VCC
VDD
VDDLBYP
OVDD LVDS/CMOS
PD
LTC2358-16
SDO0
S/H
–5V
0V
UNIPOLAR
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
S/H
S/H
MUX
16-BIT
SAR ADC
SDO7
SCKO
SCKI
SDI
CS
BUSY
CNV
S/H
IN7+
IN7–
S/H
S/H
VEE REFBUF
REFIN
GND
SAMPLE
CLOCK
235816 TA01a
EIGHT BUFFERED
SIMULTANEOUS
SAMPLING CHANNELS
Protected by U.S. Patents, including 7705765, 7961132, 8319673, 9197235.
–16384
235816 TA01b
• • •
LTC2358CLX-16
LTC2358ILX-16
LTC2358HLX-16
ARBITRARY
0
–0.25
–0.50
SDO7
SDO–/SDO6
SDO+/SDO5
SCKO–/SDO4
SCKO+/SCKO
OVDD
GND
SCKI–/SCKI
SCKI+/SDO3
SDI–/SDO2
SDI+/SDO1
SDO0
+10V
0.25
• • •
IN0– 13
IN0+ 14
GND 15
VCC 16
VEE 17
GND 18
REFIN 19
GND 20
REFBUF 21
PD 22
LVDS/CMOS 23
CNV 24
36
35
34
33
32
31
30
29
28
27
26
25
LX PACKAGE
PACKAGE
LX
48-LEAD(7mm
(7mm ×× 7mm)
7mm) PLASTIC
48-LEAD
PLASTICLQFP
LQFP
±10.24V RANGE
TRUE BIPOLAR DRIVE (IN– = 0V)
ALL CHANNELS
0.75
0.1µF
47µF
0.1µF
–15V
9
Data Converters
LTC2374-16
16-Bit, 1.6Msps, 8-Channel SAR ADC with 96dB SNR
FEATURES
DESCRIPTION
1.6Msps Throughput Rate
nn 16-Bit Resolution with No Missing Codes
nn 8-Channel Multiplexer with Selectable Input Range
nn Fully Differential (±4.096V)
nn Pseudo-Differential Unipolar (0V to 4.096V)
nn Pseudo-Differential Bipolar (±2.048V)
nn INL: ±1LSB (Maximum)
nn SNR: 96dB (Fully Differential)/93dB (Pseudo-Differential)
(Typical) at fIN = 1kHz
nn THD: –114dB (Typical) at f
IN = 1kHz
nn Programmable Sequencer
nn Selectable Digital Gain Compression
nn Single 5V Supply with 1.8V to 5V I/O Voltages
nn SPI-Compatible Serial I/O
nn Onboard 2.048V Reference and Reference Buffer
nn No Pipeline Delay, No Cycle Latency
nn Power Dissipation 55mW (Typical)
nn 32-Lead 5mm × 5mm QFN Package
The LTC2374-16 is a low noise, high speed, 8-channel
16-bit successive approximation register (SAR) ADC. Operating
from a single 5V supply, the LTC2374-16 has a highly configurable,
low crosstalk 8-channel input multiplexer, supporting fully
differential, pseudo-differential unipolar and pseudo-differential
bipolar analog input ranges. The LTC2374-16 achieves ±1LSB INL
(maximum) in all input ranges, no missing codes at 16-bits and 96dB
(fully differential)/ 93dB (pseudo-differential) SNR (typical).
nn
The LTC2374-16 has an onboard low drift (20ppm/°C max)
2.048V temperature-compensated reference and a single-shot
capable reference buffer. The LTC2374-16 also has a high speed
SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V
and 5V logic through which a sequencer with a depth of 16 may
be programmed. An internal oscillator sets the conversion time,
easing external timing considerations. The LTC2374-16 dissipates
only 55mW and automatically naps between conversions, leading
to reduced power dissipation that scales with the sampling rate.
A sleep mode is also provided to reduce the power consumption
of the LTC2374-16 to 300μW for further power savings during
inactive periods.
APPLICATIONS
Programmable Logic Controllers
Industrial Process Control
nn High Speed Data Acquisition
nn Portable or Compact Instrumentation
nn Automatic Test Equipment
nn
nn
Integral Nonlinearity
vs Output Code
1.0
FULLY DIFFERENTIAL
BIPOLAR
UNIPOLAR
0.8
INL ERROR (LSB)
OVDD
GND
0.6
GND
VDDLBYP
VDD
COM
CH0
CH1
TOP VIEW
32 31 30 29 28 27 26 25
0.4
0.2
0.0
–0.2
CH2 1
24 RESET
CH3 2
23 GND
MUXOUT+ 3
22 SDO
–0.6
21 SCK
–0.8
ADCIN+ 4
33
ADCIN– 5
–1.0
19 BUSY
6
CH4 7
CH5 8
16384
32768
49152
OUTPUT CODE
65536
237416 TA01b
17 GND
+4.096V
5V
1.8V TO 5V
UNIPOLAR
10µF
2.2µF
0.1µF
0V
+
10Ω
1200pF
+2.048V
–
0V
+4.096V
+2.048V
0V
BIPOLAR
10Ω
1200pF
CH0
CH1
CH2
CH3 MUX
CH4
CH5
CH6
CH7
COM
VDDLBYP OVDD
VDD
LTC2374-16
+
16-BIT
SAMPLING ADC
–
ADCIN–
FULLY
DIFFERENTIAL
+4.096V
ADCIN+
UH PACKAGE
UH
PACKAGE
32-LEAD(5mm
(5mm ××5mm)
PLASTIC
QFN QFN
32-LEAD
5mm)
PLASTIC
LTC2374CUH-16
LTC2374IUH-16
IN+/IN–
CNV
GND
GND
REFIN
REFBUF
GND
CH7
CH6
9 10 11 12 13 14 15 16
10
0
18 RDL
MUXOUT+
MUXOUT
20 SDI
MUXOUT–
–
–0.4
REFBUF
47µF
REFIN
0.1µF
GND
RESET
RDL
SDO
SCK
SDI
BUSY
CNV
SAMPLE
CLOCK
237416 TA01a
Protected by U.S. Patents, including 7705765, 7961132, 8319673.
Data Converters
LTC2512-24
24-Bit Oversampling ADC with Configurable
Flat Passband Digital Filter
FEATURES
DESCRIPTION
±1ppm INL (Typ)
nn 117dB Dynamic Range (Typ) at 50ksps
nn 108dB Dynamic Range (Typ) at 400ksps
nn Guaranteed 24-Bit No Missing Codes
nn Configurable Digital Filter with Synchronization
nn Relaxed Anti-Aliasing Filter Requirements
nn Dual Output 24-Bit SAR ADC
nn 24-Bit Digitally Filtered Low Noise Output
nn 14-Bit Differential + 8-Bit Common Mode
No Latency Output
nn Wide Input Common Mode Range
nn Guaranteed Operation to 85°C
nn 1.8V to 5V SPI-Compatible Serial I/O
nn Low Power: 30mW at 1.6Msps
nn 24-Lead 7mm × 4mm DFN Package
The LTC2512-24 is a low noise, low power, high performance
24‑bit ADC with an integrated configurable digital filter. Operating
from a single 2.5V supply, the LTC2512-24 features a fully
differential input range up to ±VREF, with VREF ranging from 2.5V to
5.1V. The LTC2512-24 supports a wide common mode range from
0V to VREF simplifying analog signal conditioning requirements.
nn
The LTC2512-24 simultaneously provides two output codes:
(1) a 24-bit digitally filtered high precision low noise code, and
(2) a 22‑bit no latency composite code. The configurable digital
filter reduces measurement noise by lowpass filtering and downsampling the stream of data from the SAR ADC core, giving the
24-bit filtered output code. The 22-bit composite code consists of
a 14-bit code representing the differential voltage and an 8-bit code
representing the common mode voltage. The 22-bit composite code
is available each conversion cycle, with no cycle of latency.
The digital filter can be easily configured for 4 different downsampling factors by pin strapping. The configurations provide a
dynamic range of 108dB at 400ksps and 117dB at 50ksps. The
digital lowpass filter relaxes the requirements for analog antialiasing. Multiple LTC2512-24 devices can be easily synchronized
using the SYNC pin.
APPLICATIONS
Seismology
Energy Exploration
nn Automated Test Equipment (ATE)
nn High Accuracy Instrumentation
nn
nn
TOP VIEW
3
24 GND
23 GND
22 OVDD
21 BUSY
20 SDOB
19 SCKB
18 SCKA
17 SDOA
16 GND
15 DRL
14 SYNC
13 MCLK
25
GND
2
INL ERROR (ppm)
RDLA 1
RDLB 2
VDD 3
GND 4
IN+ 5
IN– 6
GND 7
REF 8
REF 9
REF 10
SEL0 11
SEL1 12
Integral Nonlinearity vs Input Voltage
1
0
–1
–2
–3
DKD
DKD PACKAGE
PACKAGE
24-LEAD
24-LEAD (7mm
(7mm ×× 4mm)
4mm) PLASTIC
PLASTIC DFN
DFN
LTC2512CDKD-24
LTC2512IDKD-24
–5
–2.5
0
2.5
INPUT VOTLAGE (V)
5
251224f TA01a
1.8V TO 5V
2.5V
10µF
0.1µF
IN+, IN–
VREF
ARBITRARY
0V
VREF
DIFFERENTIAL
VREF
VDD
IN+
VREF
UNIPOLAR
IN –
0V
0V
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
14-BIT
GND
REF
2.5V TO 5.1V
OVDD
PIN-SELECTABLE
LOW-PASS
FLAT PASSBAND
DIGITAL FILTER 24-BIT
24-BIT
SAR ADC
CORE
0V
BIPOLAR
LTC2512-24
MCLK
BUSY
DRL
SDOA
SCKA
RDLA
RDLB
SDOB
SCKB
SAMPLE
CLOCK
251224 TA01
47µF
(X7R, 1210 SIZE)
Patents, including 7705765, 7961132, 8319673, 8576104, 8810443, 9054727, 9231611, 9331709 and Patents pending.
11
High Frequency
LTC5566
300MHz to 6GHz Dual Programmable
Gain Downconverting Mixer
FEATURES
DESCRIPTION
12dB Power Conversion Gain
nn 35dBm Output IP3
nn 15.5dB Range IF DVGA in 0.5dB Steps
nn Programmable RF Input Tuning
nn Reduced Power Mode
nn 3.3V Single Supply
nn Simple SPI for Fast Development
nn –40°C to 105°C Operation (T )
C
nn Very Small Solution Size
nn 32-Lead (5mm × 5mm) QFN Package
The LTC5566 dual programmable gain downconverting mixer is
ideal for diversity and MIMO receivers that require precise gain
setting. Each channel incorporates an active mixer and a digital
IF VGA with 15.5dB gain control range. The IF gain of each
channel is programmed in 0.5dB steps through the SPI.
nn
Programmable RF input tuning via the SPI or parallel control lines
makes the device attractive for wideband radio applications.
Furthermore, a reduced power mode is available, programmed
through the SPI.
Integrated RF transformers provide single-ended 50Ω inputs. The
differential LO input is designed for single-ended or differential
drive. The differential IF output simplifies the interface to
differential IF filters and amplifiers. The mixers are optimized for
use up to 5GHz but may be used up to 6GHz with degraded
performance.
APPLICATIONS
4G and 5G MIMO Receivers
nn Diversity Receivers
nn Distributed Antenna Systems (DAS)
nn Network Test/Monitoring Equipment
nn Software-Defined Radios
nn
LTC5566 Conversion Gain vs RF Frequency and
IF Attenuation (0.5dB Gain Steps)
14
12
GND
AI1–
AI1+
EN1
VCC1
MO1+
MO1–
T1
TOP VIEW
10
32 31 30 29 28 27 26 25
8
6
GND
1
24 IF1
RF1
2
23 IF1–
CSB
3
22 VDD
CLK
4
LO+
SDI
5
SDO
6
19 PS
RF2
7
18 IF2–
GND
8
17 IF2+
21
33
GND
GC (dB)
+
–2
–4
BAND 0 RF TUNE
IF = 153MHz
–8
2.5
3.5
4.5
1.5
2
3
4
RF INPUT FREQUENCY (GHz)
–6
GND
AI2–
AI2+
EN2
VCC2
MO2+
T0
9 10 11 12 13 14 15 16
MO2–
2
0
20 LO–
UH PACKAGE
PACKAGE
UH
32-LEAD(5mm
(5mm ×
QFN
32-LEAD
× 5mm)
5mm)PLASTIC
PLASTIC
QFN
4
5566 TA01b
Dual Channel MIMO Receiver with Programmable 0.5dB Gain Steps
LTC5566IUH
LPF
3.3V
3.3V
LTC5566
BPF
RF1
LNA
BPF
IF1+
LTC6430
IF1
IF 1–
LO+
LO
CSB
CLK
SDI
SDO
LO
LO–
SPI
LO
BPF
IF2–
BPF
LNA
LTC6430
IF2
RF2
IF 2+
5566 TA01a
3.3V
3.3V
12
5
Interface
LTM2885
6500VRMS Isolated RS485/RS422
µModule Transceiver + Power
FEATURES
DESCRIPTION
RS485/RS422 Transceiver: 6500VRMS for 1 Minute
nn Reinforced Insulation
nn Isolated DC Power: 5V at 150mA
nn No External Components Required
nn 20Mbps or Low EMI 250kbps Data Rate
nn High ESD: ±15kV HBM on Transceiver Interface
nn High Common Mode Transient Immunity: 50kV/μs
nn Integrated Selectable 120Ω Termination
nn Extended Creepage and Clearance ~14.6mm
nn 1.62V to 5.5V Logic Supply Pin for Flexible Digital Interface
nn Maximum Continuous Working Voltage: 690V
RMS
nn High Input Impedance Failsafe RS485 Receiver
nn Current Limited Drivers and Thermal Shutdown
nn Compatible with TIA/EIA-485-A and PROFIBUS
nn High Impedance Output During Internal Fault Condition
nn Low Current Shutdown Mode (< 10µA)
nn General Purpose CMOS Isolated Channel
nn 22mm × 9mm × 5.16mm Surface Mount BGA Package
The LTM2885 is a complete galvanically isolated full-duplex
RS485/RS422 µModule (micromodule) transceiver. No external
components are required. A single supply powers both sides of
the interface through an integrated, isolated, low noise, efficient
5V output DC/DC converter.
nn
Coupled inductors and an isolation power transformer provide
6500VRMS of isolation between the line transceiver and the logic
interface. This device is ideal for systems where the ground loop
is broken allowing for large common mode voltage variation.
Uninterrupted communication is guaranteed for common mode
transients up to 50kV/μs.
Maximum data rates are 20Mbps or 250kbps in slew limited mode.
Transmit data, DI, and receive data, RO, are implemented with
event driven low jitter processing. The receiver has a one-eighth
unit load supporting up to 256 nodes per bus. A logic supply pin
allows easy interfacing with different logic levels from 1.62V to
5.5V, independent of the main supply.
Enhanced ESD protection allows this part to withstand up
to ±15kV (human body model) on the transceiver interface pins to
isolated supplies and ±25kV through the isolation barrier to logic
supplies without latch-up or damage.
APPLICATIONS
Isolated RS485/RS422 Interface
Industrial Networks
nn Breaking RS485 Ground Loops
nn Isolated PROFIBUS-DP Networks
nn
nn
LTM2885 Operating Through 100kV/μs CM Transients
TOP VIEW
6
5
4
3
2
1
5V/DIV
ON
VL
VCC
RO
A
RE
B
DE
Z
DI
GND
TE
DOUT NC
A
B
C
D
E
F
G
H
J
K
L
BGA PACKAGE
42-PIN (22mm × 9mm × 5.2mm)
LTM2885CY
LTM2885IY
LTM2885HY
M
N
P
DI
RO
5V/DIV
VCC2
MULTIPLE SWEEPS
OF COMMON MODE
TRANSIENTS
300V/DIV
GND2
Y
NC
DIN
R
S
SLO
T
20ns/DIV
2885 TA01b
Isolated Half-Duplex RS485 μModule Transceiver
5V
VCC
VL
RO
PWR
ISOLATION BARRIER
7
RE
TE
DE
DI
LTM2885
VCC2
A
5V
OUT
B
TWISTED-PAIR
CABLE
Y
Z
GND
GND2
2885 TA01a
13
Interface
LTM2887
SPI/Digital or I2C µModule Isolator with
Dual Adjustable 5V Regulators
FEATURES
DESCRIPTION
6-Channel Logic Isolator: 2500VRMS for 1 Minute
nn UL-CSA Recognition Pending
nn Isolated DC Power:
nn 1.8V to 5V Logic Supply at Up to 100mA
nn 0.6V to 5V Auxiliary Supply at Up to 100mA
nn No External Components Required
nn SPI/Digital (LTM2887-S) or I2C (LTM2887-I) Options
nn High Common Mode Transient Immunity: 30kV/μs
nn High Speed Operation:
nn 10MHz Digital Isolation
nn 4MHz/8MHz SPI Isolation
nn 400kHz I2C Isolation
nn 3.3V (LTM2887-3) or 5V (LTM2887-5) Operation
nn 1.62V to 5.5V Logic Supply
nn ±10kV ESD HBM Across the Isolation Barrier
nn Maximum Continuous Working Voltage: 560V
PEAK
nn Low Current Shutdown Mode (<10µA)
nn Low Profile 15mm × 11.25mm × 3.42mm BGA Package
The LTM2887 is a complete galvanic digital µModule (micromodule)
isolator. No external components are required. A single 3.3V or 5V
supply powers both sides of the interface through an integrated,
isolated DC/DC converter. A logic supply pin allows easy interfacing
with different logic levels from 1.62V to 5.5V, independent of the
main supply.
nn
Available options are compliant with SPI and I2C (master mode only)
specifications.
The isolated side includes two 5V nominal power supplies, including
programmable current limit, each capable of providing more than
100mA of load current. The supplies may be adjusted from their
nominal value using a single external resistor.
Coupled inductors and an isolation power transformer provide
2500VRMS of isolation between the input and output logic interface.
This device is ideal for systems where the ground loop is broken,
allowing for a large common mode voltage range. Communication
is uninterrupted for common mode transients greater than 30kV/μs.
APPLICATIONS
LTM2887 Operating Through 50kV/µs CM Transients
Isolated SPI or I2C Interfaces
Industrial Systems
nn Test and Measurement Equipment
nn Breaking Ground Loops
nn
nn
5V/DIV
TOP VIEW
1
2
3
4
DO2 DNC SCL SDA
TOP VIEW
5
6
7
8
DI1
GND
ON
VL
A
1
2
3
4
SDO DO2 SCK
SDI
DO1
GND
5
6
7
REPETITIVE
COMMON MODE
TRANSIENTS
GND2 TO GND
8
CS SDOE ON
VL
A
B
B
DO1
VCC
GND
C
D
D
E
E
F
F
G
G
H
J
VCC
200V/DIV
Isolated 4MHz SPI Interface
H
I1
GND2
AVL2 IVL2 AVCC2
J
LTM2887-5S
I1
GND2
AVL2 IVL2 AVCC2
5V
K
VL
L
L
ON
DNC SCL2 SDA2 O1
VL2 IVCC2 VCC2
SDO2
I2
SCK2 SDI2 CS2
VCC2
VCC
K
I2
2887 TA01b
20ns/DIV
AVCC2
IVCC2
BGA PACKAGE
PACKAGE
BGA
32-PIN
(15mm ×× 11.25mm
11.25mm × 3.42mm)
32-PIN
(15mm
× 3.42mm)
BGA PACKAGE
PACKAGE
BGA
32-PIN
(15mm ×× 11.25mm
11.25mm × 3.42mm)
32-PIN
(15mm
× 3.42mm)
LTM2887CY-3I
LTM2887IY-3I
LTM2887HY-3I
LTM2887CY-5I
LTM2887IY-5I
LTM2887HY-5I
LTM2887CY-3S
LTM2887IY-3S
LTM2887HY-3S
LTM2887CY-5S
LTM2887IY-5S
LTM2887HY-5S
SDOE
CS
SDI
SCK
SDO
CS
SDI
SCK
5V AT 100mA
1.15k
VL2
3.3V AT 100mA
AVL2
VL2 IVCC2 VCC2
ISOLATION BARRIER
C
SCK
SD0
SCK2 = SD02
27.4k
IVL2
1.15k
CS2
SDI2
SCK2
DO2
I2
SDO
SDO2
DO1
I1
GND
GND2
6.04k
CS
SDI
SCK
SDO
2887 TA01a
14
Isolated CAN + Power
Rugged 4Mbps µModule CAN Transceiver
Features 2500V RMS Isolation and ±25kV ESD Protection
Galvanic Isolation
3.3V or 5V
ISOLATED
CAN
Controller
POWER
TXD
REG
5V OUT
CANH
RXD
CAN
BUS
CANL
LTM2889
The LTM®2889 is a robust isolated CAN transceiver that breaks ground loops by isolating the logic level interface and line
transceiver. An onboard DC/DC converter powers the transceiver and provides 0.75W for powering additional system
circuitry. The ISO 11898-2 compliant CAN transceiver supports an extended common mode range of ±36V, is ±60V fault
protected and ±25kV ESD protected, and provides uninterrupted communication during common mode transients over 30kV/µs.
This ensures high system reliability under the harshest operating conditions.
Features
•
•
•
•
•
Isolated 4Mbps CAN Transceiver
2500VRMS for 1 Minute per UL1577
Up to 150mA Isolated Power Output
±60V Fault Protection
High Common Mode Transient
Immunity: 30kV/µs
• ±25kV ESD Transceiver Interface
• 15mm x 11.25mm BGA Package
LTM2889 ±25kV ESD Protection
Info & Free Samples
www.linear.com/product/LTM2889
www.linear.com/products/
umodule_solutions
1-800-4-LINEAR
, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Power over Ethernet Controller
LTC4279
Single Port PoE/PoE+/LTPoE++ PSE Controller
FEATURES
DESCRIPTION
Compliant with IEEE 802.3at Type 1 and 2
nn Supports LTPoE++ Up to 90W
nn Supports Dual-Signature PDs
nn Fully Autonomous Operation without Microcontroller
nn Very Low Power Dissipation
nn 0.1Ω Sense Resistance
nn Low R
DS(ON) External MOSFET
nn Very High Reliability 4-Point PD Detection
nn 2-Point Forced Voltage and Forced Current
nn Robust Short-Circuit Protection
nn Cable Surge Protected ±80V OUT Pin
nn Classification Dependent I
CUT and ILIM Current Thresholds
nn Supports 2-Pair and 4-Pair Output Power
nn UltraPWR Mode Supports Custom PDs Up to 123W
nn Pin-Selectable Detection Backoff Timer for Midspans
nn Pin Programmable Legacy PD Detection
nn Pin Programmable Maximum Power Mode
nn Status LED Pin
nn Available in 20-Lead QFN and 16-Lead SO Packages
The LTC4279 is an autonomous single port power sourcing
equipment (PSE) controller designed for use in IEEE 802.3at Type 1,
Type 2 and LTPoE++ compliant Power over Ethernet (PoE) systems.
The LTC4279 provides fully autonomous IEEE 802.3 and LTPoE++
compliant operation without a microcontroller. The LTC4279
simplifies PSE implementation, requiring only a single supply and a
small number of passive support components.
nn
The LTC4279 delivers lowest-in-industry heat dissipation by
utilizing a low RDS(ON) external MOSFET and a 0.1Ω sense resistor,
eliminating the need for expensive heat sinks and increasing
efficiency.
PD discovery uses a proprietary dual-mode 4-point detection
mechanism ensuring excellent immunity from false PD detection.
Midspan PSEs are supported with physical layer classification and
a 2.5 second backoff timer.
Legacy and custom PDs are supported with pin-selectable
LEGACY and UltraPWR modes. LEGACY mode detects and
powers pre-IEEE specification PDs. UltraPWR mode aggressively
turns on and powers custom PDs requiring high inrush and/or
operational currents.
APPLICATIONS
PoE PSE Endpoints (Switch/Router)
nn PoE Midspan Power Injectors
nn Power Forwarders
nn Femto Cells
nn Security Systems
nn
DNC
RESET
MID
DNC
TOP VIEW
20 19 18 17
TOP VIEW
DNC 1
16 DUALPD
15 LEGACY
MID 1
16 RESET
DNC 2
DNC 2
15 DNC
DNC 3
DNC 3
14 DUALPD
VEE 4
VSSK 4
13 LEGACY
VSSK 5
12 DNC
SENSE 6
11 DNC
7
8
OUT 7
10 VEE
AGND 8
9
SSPACKAGE
PACKAGE
16-LEAD
16-LEADPLASTIC
PLASTICSO
SO
LTC4279IS
LED
9 10
3.32k
LTPoE++ 38.7W
4.64k
LTPoE++ 52.7W
5.90k
LTPoE++ 70W
7.87k
LTPoE++ 90W
10.0k
UltraPWR – (Up to 123W*)
13.0k
*Depending on VPSE
UFD PACKAGE
20-LEAD (4mm × 5mm) PLASTIC QFN
LTC4279IUFD
10Ω
TVSBULK
CBULK
LED
RESET
RPM
MID
LEGACY
DUALPD
0.22µF
100V S1B
X7R
AGND
LTC4279
OUT
GATE
PWRMODE
1µF
100V
X7R
SMAJ58A
VEE
16
2.37k
Type 2 (25.5W)
13 PWRMODE
LED
11 DNC
AGND
GATE 6
OUT
12 PWRMODE
RPM (±1%)
Type 1 (13W)
14 DNC
21
VEE
GATE
SENSE 5
MAXIMUM PD INPUT POWER
RGATE
SENSE
0.1Ω
VEE
VSSK
4279 TA01
+
PORT
–
μModule Regulators
LTM4636
40A DC/DC µModule Regulator
FEATURES
DESCRIPTION
Stacked Inductor Acts as Heat Sink
nn Wide Input Voltage Range: 4.7V to 15V
nn 0.6V to 3.3V Output Voltage Range
nn ±1.3% Total DC Output Voltage Error Over Line,
Load and Temperature (–40°C to 125°C)
nn Differential Remote Sense Amplifier for
Precision Regulation
nn Current Mode Control/Fast Transient Response
nn Frequency Synchronization
nn Parallel Current Sharing (Up to 240A)
nn Internal or External Compensation
nn 88% Efficiency (12V
IN, 1VOUT) at 40A
nn Overcurrent Foldback Protection
nn 16mm × 16mm × 7.07mm BGA Package
The LTM4636 is a 40A step-down µModule (power module)
switching regulator with a stacked inductor as a heat sink for
quicker heat dissipation and cooler operation in a small package.
The exposed inductor permits direct contact with airflow from
any direction. The LTM4636 can deliver 40W (12VIN, 1VOUT, 40A,
200LFM) with only 40°C rise over the ambient temperature. Fullpower 40W is delivered, up to 83°C ambient and half-power 20W
is supported at 110°C ambient.
nn
The LTM4636 operates at 92%, 90% and 88% efficiency,
delivering 15A, 30A and 40A, respectively, to a 1V load (12VIN).
The µModule regulator is scalable such that four µModules in
current sharing mode deliver 160W with only 40°C rise and 88%
efficiency (12VIN, 1VOUT, 400LFM). The LTM4636 is offered in a
16mm × 16mm × 7.07mm BGA package.
APPLICATIONS
nn
12VIN , 1VOUT Efficiency vs Output Current
Telecom Servers and Networking Equipment
Industrial Equipment and Medical Systems
100
TOP VIEW
VOUTS1– VOUTS1+ COMPB
1
2
3
4
5
6
A
TRACK/SS
RUNC
PGOOD
SNSP1
SNSP2
MODE/PLLIN
9
10
11
C
VFB COMPA
GND
FREQ GND
G
TEST3
L
TEMP–
TEMP+
GMON
NC
PWM TMON
TEST1
GND
VIN
90
85
80
75
GND
J
K
PHASMD
RUNP
PVCC
INTVCC
F
H
95
12
TEST4 (FLOAT PIN)
D
E
SGND
CLKOUT
8
VOUT
B
TEST2
HIZREG
7
EFFICIENCY (%)
nn
70
0
5
SW
10 15 20 25 30
OUTPUT CURRENT (A)
35
40
4636 TA01b
M
1V, 40A DC/DC µModule Regulator
BGAPACKAGE
PACKAGE
BGA
144-LEAD (16mm × 16mm × 7.07mm)
144-LEAD (16mm × 16mm × 7.07mm)
LTM4636EY
LTM4636IY
VIN ≤ 5.5V, TIE VIN, INTVCC AND PVCC
TOGETHER, TIE RUNP TO GND.
VIN > 5.5V, THEN OPERATE AS SHOWN
4.70V TO
15V
+
PVCC
PVCC
100µF
25V
22µF
16V
×5
INTVCC
15k
0.1µF
INTVCC
34.8k
22µF
VIN INTVCC PVCC
RUNC
LTM4636
RUNP
HIZREG
FREQ
TRACK/SS
MODE/PLLIN
1V
VOUT
VOUTS1+
+
VOUTS1–
VOUT
1V, 40A
470µF
6.3V
×3
100µF
6.3V
×4
SNSP1
SNSP2
PINS NOT USED IN THIS CIRCUIT:
CLKOUT, GMON, PGOOD, PHMODE, PWM,
SW, TEST1, TEST2, TEST3, TEST4, TMON
OPTIONAL TEMP MONITOR
Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210, 8163643.
COMPA
COMPB
TEMP+ TEMP–
VFB
SGND PGND
7.5k
4636 TA01a
17
μModule Regulators
LTM4647
30A DC/DC Step-Down µModule Regulator
FEATURES
DESCRIPTION
4.7V to 15V Input Voltage Range
nn 0.6V to 1.8V Output Voltage Range
nn 30A DC Output Current
nn ±1.2% Total DC Output Voltage Error (–40°C to 125°C)
nn High Reliability N + 1 Phase Redundancy Supported
nn Internal or External Control Loop Compensation
nn Differential Remote Sense Amplifier for Precision
Regulation
nn Current Mode Control/Fast Transient Response
nn Multiphase Current Sharing Up to 180A
nn Built-In Temperature Monitoring
nn Selectable Pulse-Skipping, Burst Mode® Operation
nn Soft-Start/Voltage Tracking
nn Frequency Synchronization
nn Output Overvoltage Protection
nn Output Overcurrent Foldback Protection
nn 9mm × 15mm × 5.01mm BGA Package
nn
APPLICATIONS
The LTM4647 is a complete 30A output switching mode stepdown DC/DC µModule (power module) regulator. Included in the
package are the switching controller, power FETs, inductor and
all supporting components. Operating over an input voltage range
of 4.7V to 15V, the LTM4647 supports an output voltage range of
0.6V to 1.8V, set by a single external resistor. Only a few input and
output capacitors are needed.
Its high efficiency design delivers 87% efficiency from 12V input
to 1.0V output with 30A continuous load current. High switching
frequency and a current mode architecture enable a very fast
transient response to line and load changes without sacrificing
stability. The device supports frequency synchronization,
programmable multiphase operation, N + 1 phase redundancy,
and output voltage tracking for supply rail sequencing.
Fault protection features include overvoltage and overcurrent
protection. The power module is offered in a space saving
9mm × 15mm × 5.01mm BGA package. The LTM4647 is
available with SnPb (BGA) or RoHS compliant terminal finish.
Telecom, Networking and Industrial Equipment
nn Point-of-Load Regulation
nn
1VOUT Efficiency vs Load Current
100
A
DRVCC
TEST2
B
VIN
TEMP–
E
TRACK/SS
SW
TEMP+ F
VOSNS–
G
H
J
K
GND
90
CLKOUT
PWM
C
D
95
HIZB
GND
GND
VOUT
EFFICIENCY (%)
2
1
TOP VIEW
3
4
5
6
7
GND GND RUN GND
TEST1
MODE/PLLIN
INTVCC
PHASMD
SVIN
FREQ
VFB
SGND
85
80
75
70
TEST3
VOSNS+
PGOOD
COMPa
COMPb
65
5V INPUT*
12V INPUT
5
0
10
15
GND
2.2Ω
VIN
6V TO 15V
VIN
22µF
25V
×2
SVIN
4647 TA01b
DRVCC INTVCC
HIZB
FREQ
43.2k
LTM4647
VOUT
COMPa
VOSNS+
COMPb
VFB
TRACK/SS
0.1µF
VOSNS–
SGND GND
4647 TA01a
PINS NOT USED IN THIS CIRCUIT:
CLKOUT, MODE/PLLIN, PGOOD,
PHASMD, PWM, RUN, SW, TEMP+, TEMP–
18
30
4.7µF
6.3V
1µF
LTM4647EY
LTM4647IY
LTM4647IY
25
12VIN, 1VOUT, 30A DC/DC µModule Regulator
L
BGA PACKAGE
PACKAGE
BGA
77-LEAD (9mm
(9mm ×× 15mm
15mm ×
× 5.01mm)
77-LEAD
5.01mm)
20
LOAD CURRENT (A)
*5V INPUT SEE FIGURE 24
47pF
90.9k
VOUT
1V
30A
100µF
6.3V
×6
18V/5A Monolithic Buck-Boost
2.5V to 18V
VOUT
VIN
0.8V to 18V
LTC3119
GND
Active Area < 300mm 2
Internal FETs & Sense Resistor Simplify Design
Our LTC3119 brings a new level of performance and integration to our growing family of monolithic Buck-Boost converters.
Its internal switches can deliver up to 5A of output current while having fast transient response due to its current mode
control and a compact solution footprint. Its 2.5V to 18V input range is ideal for single to multicell battery configurations
as well as poorly regulated 5V or 12V adapters and the output can be set to any voltage from 0.8V to 18V. The LTC3119
has a low 35µA quiescent current, programmable switching frequency from 400kHz to 2MHz and can deliver up to 98%
conversion efficiency allowing design flexibility and a low noise output.
Broad Line of Monolithic Buck-Boost Converters
Part
Number
VIN
Range
(V)
VOUT
Range
(V)
IOUT in
Buck Mode
(A)
Comments
LTC3114-1
LTC3118
LTC3115
LTC3112
LTC3113
2.2 to 40
2.2 to 18
2.7 to 40
2.7 to 15
1.8 to 5.5
2.7 to 40
2 to 18
2.7 to 40
2.5 to 14
1.8 to 5.5
1
2
2
2.5
4
IQ = 30μA, Efficiency up to 96%, Programmable Output Current
Dual Input PowerPath™, Efficiency up to 94%
IQ = 30μA, Efficiency up to 95%, UVLO
IQ = 50μA, Efficiency up to 95%, OVP, Output Disconnect
IQ = 40μA, Efficiency up to 96%, Output Disconnect
LTC3119
LTM8054
LTM8056
LTM8055
LTM4607
2.5 to 18
5 to 36
5 to 58
5 to 36
4.5 to 36
0.8 to 18
1.2 to 36
1.2 to 48
1.2 to 36
0.8 to 24
5
5.4
5.5
8.5
10
LTM4609
4.5 to 36 0.8 to 34
10
IQ = 35μA, Efficiency up to 98%, MPPC
15mm x 11.25mm x 3.42mm BGA Package, Internal Inductor
15mm x 15mm x 4.92mm BGA Package, Internal Inductor
15mm x 15mm x 4.92mm BGA Package, Internal Inductor
15mm x 15mm x 2.82mm LGA Package, External Inductor
15mm x 15mm x 2.82mm LGA or 15mm x 15mm x 3.42mm
BGA Package, External Inductor
LTM4605
4.5 to 20 0.8 to 16
12
15mm x 15mm x 2.82mm LGA Package, External Inductor
Info & Free Samples
www.linear.com/product/LTC3119
1-800-4-LINEAR
, LT, LTC, LTM, Linear Technology, the Linear logo and PowerPath
are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Switching Regulators—Monolithic
LTC3119
18V, 5A Synchronous Buck-Boost DC/DC Converter
FEATURES
DESCRIPTION
Input Voltage Range: 2.5V to 18V
nn Runs Down to V
IN = 250mV After Start-Up
nn Output Voltage Range: 0.8V to 18V
nn 5A Output Current in Buck Mode, V
IN > 6V
nn 3A Output Current for V
=
3.6V,
V
IN
OUT = 5V
nn Programmable Switching Frequency: 400kHz to 2MHz
nn Synchronizable with an External Clock Up to 2MHz
nn Accurate Run Comparator Threshold
nn Burst Mode Operation, No-Load I
Q = 35µA
nn Ultralow Noise Buck-Boost PWM
nn Current Mode Control
nn Maximum Power Point Control
nn Power Good Indicator
nn Internal Soft-Start
nn 28-Lead 4mm × 5mm QFN and TSSOP Packages
The LTC3119 is a high efficiency 18V monolithic buck-boost
converter that can deliver up to 5A of continuous output current.
Extensive feature integration and very low resistance internal
power switches minimize the total solution footprint for even
the most demanding applications. A proprietary 4-switch PWM
architecture provides seamless low noise operation from input
voltages above, equal to or below the output voltage.
nn
External frequency programming as well as synchronization using
an internal PLL enable operation over a wide switching frequency
range of 400kHz to 2MHz. The wide 2.5V to 18V input range is well
suited for operation from unregulated power sources including
battery stacks and backup capacitors. After start-up, operation is
possible with input voltages as low as 250mV.
Other features include: output short-circuit protection, thermal
overload protection, less than 3µA shutdown current, power good
indicator, Burst Mode operation, and maximum power point control.
APPLICATIONS
The LTC3119 is offered in thermally enhanced 28-lead 4mm × 5mm
QFN and TSSOP packages.
Wide Input Range Power Supplies
nn 1- to 4-Cell Lithium Battery Powered Products
nn RF Power Supplies
nn Solar Battery Chargers
nn System Backup Power Supplies
nn Lead-Acid to 12V Regulator
nn
Efficiency Efficiency
100
TOP VIEW
28 27 26 25 24 23
1
28 PWM/SYNC
N/C
2
27 N/C
BST2
3
26 BST1
PGND
4
25 PGND
SW2
5
24 SW1
PGND 1
22 PGND
SW2 2
21 SW1
PVOUT
6
PVOUT 3
20 PVIN
19 PVIN
PVOUT
7
SW2
8
18 SW1
PGND
9
PVOUT 4
29
PGND
SW2 5
PGND 6
17 PGND
PGOOD 7
SVCC 8
15 RUN
RT
VCC
MPPC
SGND
FB
VC
9 10 11 12 13 14
UFD
UFDPACKAGE
PACKAGE
28-LEAD (4mm
(4mm ××5mm)
PLASTIC
QFN
28-LEAD
5mm)
PLASTIC
LTC3119EUFD
LTC3119IUFD
PGOOD 10
SVCC 11
16 VIN
23 PVIN
29
PGND
22 PVIN
18 RUN
16 VCC
40
15 MPPC
1m
10m
100m
LOAD CURRENT (A)
1
10
Wide Input Range 5V Regulator
FE PACKAGE
FE
PACKAGE
28-LEAD PLASTIC TSSOP
28-LEAD PLASTIC TSSOP
LTC3119EFE
LTC3119IFE
LTC3119HFE
LTC3119MPFE
VIN = 3V
VIN = 5V
VIN = 9V
3119 TA01b
3.3µH
0.1µF
0.1µF
VIN
2.5V TO 18V
10µF
100k
SW1
BST1
PVIN
VIN
RUN
BURST PWM
4.7µF
20
PWM
50
10
100μ
19 VIN
17 RT
60
20
20 PGND
FB 12
70
30
21 SW1
VC 13
SGND 14
QFN
80
N/C
EFFICIENCY (%)
BST1
N/C
PWM/SYNC
N/C
N/C
BST2
TOP VIEW
Burst Mode OPERATION
90
SW2
BST2
PVOUT
150µF
LTC3119
536k
PWM/SYNC
FB
MPPC
VCC
PGOOD
SVCC
VC
RT
PGND GND
105k
VOUT
5V AT 5A, VIN > 6V
5V AT 3A, VIN = 3.6V
3119 TA01a
102k
78.7k
680pF
Switching Regulators—Monolithic
LT8606
42V, 350mA Synchronous Step-Down
Regulator with 2.5µA Quiescent Current
FEATURES
DESCRIPTION
Wide Input Voltage Range: 3.0V to 42V
nn Ultralow Quiescent Current Burst Mode Operation:
nn <2.5µA I
Q Regulating 12VIN to 3.3VOUT
nn Output Ripple <10mV
P-P
nn High Efficiency 2MHz Synchronous Operation:
nn >92% Efficiency at 0.5A, 5V
OUT from 12VIN
nn 350mA Maximum Continuous Output
nn Fast Minimum Switch-On Time: 45ns
nn Adjustable and Synchronizable: 200kHz to 2.2MHz
nn Spread Spectrum Frequency Modulation for Low EMI
nn Allows Use of Small Inductors
nn Low Dropout
nn Peak Current Mode Operation
nn Accurate 1V Enable Pin Threshold
nn Internal Compensation
nn Output Soft-Start and Tracking
nn Small 10-Lead MSOP Package or 8-Lead
2mm × 2mm DFN Package
The LT8606 is a compact, high efficiency, high speed synchronous
monolithic step-down switching regulator that consumes only
1.7µA of non-switching quiescent current. The LT8606 can deliver
350mA of continuous current. Top and bottom power switches
are included with all necessary circuitry to minimize the need for
external components. Low ripple Burst Mode operation enables
high efficiency down to very low output currents while keeping
the output ripple below 10mVP-P. Internal compensation with
peak current mode topology allows the use of small inductors
and results in fast transient response and good loop stability.
The EN/UV pin has an accurate 1V threshold and can be used to
program VIN undervoltage lockout or to shut down the LT8606
reducing the input supply current to 1µA. The PG pin signals
when VOUT is within ±8.5% of the programmed output voltage
as well as fault conditions.
nn
The LT8606 in the 10-lead MSOP allows selection of low IQ
Burst Mode operation, pulse-skipping or spread spectrum operation
for low EMI, and can be synchronized to an external clock.
The 8-lead 2mm × 2mm DFN package operates in Burst Mode
operation. The MSOP has programmable soft-start and tracking.
APPLICATIONS
General Purpose Step-Down
nn Low EMI Step-Down
nn
12VIN to 5VOUT Efficiency
100
95
TOP VIEW
1
2
3
4
5
11
GND
10
9
8
7
6
EN/UV
VIN
PG
TR/SS
FB
SW 2
INTVCC 3
EFFICIENCY (%)
BST
SW
INTVCC
RT
SYNC
90
8 EN/UV
BST 1
TOP VIEW
7 VIN
9
GND
6 PG
5 FB
RT 4
MSE PACKAGE
10-LEAD PLASTIC MSOP
DC PACKAGE
PACKAGE
DC
8-LEAD (2mm
(2mm ×× 2mm) PLASTIC DFN
8-LEAD
LT8606EMSE
LT8606IMSE
LT8606EDC
LT8606IDC
85
80
75
70
65
60
SYNC = 0V
L = 4.7µH
fSW = 2MHz
55
50
0
50
100
150 200
IOUT (mA)
250
300
350
8606 TA01b
5V, 2MHz Step-Down
VIN
5.5V TO 42V
4.7µF ON OFF
VIN
EN/UV
SYNC
BST
0.1µF 4.7µH
SW
10pF
1M
LT8606
INTVCC
TR/SS
RT
1µF
18.2k
GND
VOUT
5V
350mA
PG
FB
22µF
187k
8606 TA01a
L = XFL4020-472ME
21
Switching Regulators—Monolithic
LT8607
42V, 750mA Synchronous Step-Down
Regulator with 2.5µA Quiescent Current
FEATURES
DESCRIPTION
Wide Input Voltage Range: 3.0V to 42V
nn Ultralow Quiescent Current Burst Mode Operation:
nn <2.5µA I
Q Regulating 12VIN to 3.3VOUT
nn Output Ripple <10mV
P-P
nn High Efficiency 2MHz Synchronous Operation:
nn >92% Efficiency at 0.5A, 5V
OUT from 12VIN
nn 750mA Maximum Continuous Output
nn Fast Minimum Switch-On Time: 45ns
nn Adjustable and Synchronizable: 200kHz to 2.2MHz
nn Spread Spectrum Frequency Modulation for Low EMI
nn Allows Use of Small Inductors
nn Low Dropout
nn Peak Current Mode Operation
nn Accurate 1V Enable Pin Threshold
nn Internal Compensation
nn Output Soft-Start and Tracking
nn Small 10-Lead MSOP Package or 8-Lead 2mm × 2mm
DFN Package
The LT8607 is a compact, high efficiency, high speed synchronous
monolithic step-down switching regulator that consumes only
1.7µA of non-switching quiescent current. The LT8607 can deliver
750mA of continuous current. Top and bottom power switches
are included with all necessary circuitry to minimize the need for
external components. Low ripple Burst Mode operation enables
high efficiency down to very low output currents while keeping
the output ripple below 10mVP-P. Internal compensation with
peak current mode topology allows the use of small inductors
and results in fast transient response and good loop stability.
The EN/UV pin has an accurate 1V threshold and can be used to
program VIN undervoltage lockout or to shut down the LT8607
reducing the input supply current to 1µA. The PG pin signals when
VOUT is within ±8.5% of the programmed output voltage as well as
fault conditions.
nn
The LT8607 in the 10-lead MSOP allows selection of low IQ
Burst Mode operation, pulse-skipping or spread spectrum operation
for low EMI, and can be synchronized to an external clock.
The 8-lead 2mm × 2mm DFN package operates in Burst Mode
operation. The MSOP has programmable soft-start and tracking.
APPLICATIONS
General Purpose Step-Down
nn Low EMI Step-Down
nn
12VIN to 5VOUT Efficiency
100
TOP VIEW
BST
SW
INTVCC
RT
SYNC
1
2
3
4
5
11
GND
10
9
8
7
6
EN/UV
VIN
PG
TR/SS
FB
MSE PACKAGE
10-LEAD PLASTIC MSOP
LT8607EMSE
LT8607IMSE
SW 2
INTVCC 3
9
GND
95
8 EN/UV
90
7 VIN
85
EFFICIENCY (%)
BST 1
TOP VIEW
6 PG
5 FB
RT 4
DC PACKAGE
8-LEAD (2mm
(2mm ×× 2mm) PLASTIC DFN
8-LEAD
LT8607EDC
LT8607IDC
80
75
70
65
60
SYNC = 0V
L = 3.3µH
fSW = 2MHz
55
50
0
125
250
5V, 2MHz Step-Down
VIN
5.5V TO 42V
4.7µF ON OFF
VIN
EN/UV
SYNC
BST
0.1µF 3.3µH
SW
LT8607
INTVCC
TR/SS
RT
1µF
18.2k
GND
10pF
PG
FB
1M
22µF
187k
8607 TA01a
L = XFL4020-332ME
22
VOUT
5V
750mA
375
500
IOUT (mA)
625
750
8607 TA01b
Switching Regulators—Monolithic
LT8630
100V, 0.6A Synchronous Micropower Step‑Down
High Efficiency Switching Regulator
FEATURES
DESCRIPTION
Ultrawide Input Voltage Range: 3V to 100V
nn Boundary Mode Switching for Highest Efficiency
nn Output Voltage Range: 0.8V to 60V
nn Internal Synchronous Switches
nn Burst Mode Operation:
nn 16µA I
Q at 12VIN to 5VOUT
nn 7µA I
Q at 48VIN to 5VOUT
nn Low Dropout: 99% Maximum Duty Cycle
nn Peak Current Mode Control
nn Programmable Undervoltage Lockout
nn Power Good Flag
nn Flexible Output Voltage Tracking
nn Short-Circuit Protection
nn Low Shutdown Current: 5µA
nn Tolerates Pin Open/Short Faults
nn Thermally Enhanced 20-Lead TSSOP with
High Voltage Lead Spacing
The LT8630 is a current mode PWM step-down DC/DC converter
with internal synchronous switches that provide current for output
loads up to 0.6A. The wide input range of 3V to 100V makes
the LT8630 suitable for regulating power from a wide variety of
sources, including automotive and industrial systems and 36V to
72V telecom supplies. Variable frequency boundary mode switching
maximizes efficiency across a wide range of input voltages. Low
ripple Burst Mode operation enables high efficiency operation
down to very low output currents while keeping the output ripple
below 5mV. The soft-start feature controls the ramp rate of the
output voltage, eliminating input current surge during start-up,
while also providing output tracking. A power good flag signals
when the output voltage is within ±7.5% of the regulated output.
Undervoltage lockout can be programmed using the EN/UV pin.
Shutdown mode reduces the total quiescent current to < 5µA. The
LT8630 is available in a 20-lead TSSOP package with exposed pad
for low thermal resistance and high voltage lead spacing.
nn
APPLICATIONS
Efficiency at VOUT = 12V
Automotive Supplies
nn Telecom Supplies
nn Distributed Supply Regulation
nn
100
90
80
VIN
1
20 SW
EN/UV
3
18 BST
PG
5
GND
21
EFFICIENCY (%)
TOP VIEW
70
60
50
16 INTVCC
40
NC
6
15 NC
30
DNC
7
14 IND
20
RT
8
13 NC
NC
9
12 VOUT
TR/SS 10
VIN = 24V
VIN = 48V
VIN = 72V
VIN = 100V
0
100 200 300 400 500 600 700 800
LOAD CURRENT (mA)
8630 TA01b
11 FB
FE PACKAGE
VARIATION FE20(16)
20-LEAD PLASTIC TSSOP
LT8630EFE
LT8630IFE
12V, 0.6A Step-Down Converter
VIN
13V TO 100V
2.2µF
VIN
BST
EN/UV
SW
PG
0.1µF
22µH
LT8630
IND
2.2µF
INTVCC
VOUT
10pF
RT
1M
VOUT
12V
0.6A
FB
8.66k
71.5k
TR/SS
GND
47µF
0.1µF
8630 TA01a
23
Switching Regulators—Controllers
LTC3897
PolyPhase Synchronous Boost Controller
with Input/Output Protection
FEATURES
DESCRIPTION
Input Supply Range: 4.5V to 65V (Up to 75V Surge)
nn Reverse Input Protection to –40V
nn Inrush Current Control, Overcurrent Protection
and Output Disconnect for Boost Converter
nn Input Voltage Surge Protection with Adjustable
Clamp Voltage
nn Onboard Ideal Diode Controller
nn Low Quiescent Current: 55µA
nn 2-Phase Operation Reduces Required Input
and Output Capacitance and Noise
nn Output Voltage Up to 60V
nn Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) for Logic‑Level
TOP VIEW
or Standard Threshold FETs
nn No External Bootstrap
Diodes Required
38 37 36 35 34 33
The LTC3897 is a synchronous boost DC/DC controller with surge
stopper and ideal diode controller.
Industrial
nn Automotive
nn Military/Avionics
nn
IS+
SPFB
IS –
TMR
SGEN
24 BG1
INTVCC 9
23 VBIAS
80
22 EXTVCC
34 DG
ILIM
6
33 CS
SENSE1+
7
32 SG
SENSE1–
8
DTC
9
21 DRVCC
ITH 11
SENSE2– 12
20 BG2
13 14 15 16 17 18 19
BOOST2
35 IS+
5
VFB 17
DRVSET 8
SW2
4
100
25 BOOST1
TG2
FREQ
PHASMD
SENSE2+ 16
26 SW1
90
CLKOUT
37 SPFB
36 IS –
Efficiency and Power Loss vs Output Current
27 TG1
39
GND
SS
3
SENSE2– 15
28 VIN
5
VFB
PLLIN/MODE
ITH 14
29 SG
SENSE2+
38 TMR
2
RUN 13
ILIM 3
SENSE1+ 4
The LTC3897 is available in thermally enhanced 38-lead (leadless)
QFN or 38-lead TSSOP packages.
UHFPACKAGE
PACKAGE
UHF
38-LEAD (5mm × 7mm) PLASTIC QFN
38-LEAD
(5mm × 7mm) PLASTIC QFN
31 VIN
29 SW1
28 BOOST1
60
1k
BURST LOSS
50
100
40
30
VIN = 12V
VOUT = 24V
Burst Mode OPERATION
FIGURE 17 CIRCUIT
10
0
0.001
0.01
0.1
1
OUTPUT CURRENT (A)
10
10
1
3897 G02
27 BG1
26 VBIAS
25 EXTVCC
24 DRVCC
23 BG2
22 BOOST2
SS 18
21 SW2
CLKOUT 19
20 TG2
PACKAGE
FE FEPACKAGE
38-LEAD PLASTIC TSSOP
38-LEAD PLASTIC TSSOP
LTC3897EFE
LTC3897IFE
LTC3897HFE
24V/10A 2-Phase Synchronous Boost Converter with Surge Protection and Reverse Protection
INPUT VOLTAGE SURGE PROTECTION
IN-RUSH/OVERCURRENT PROTECTION
VIN
6V TO
55V
REVERSE CURRENT PROTECTION (IDEAL DIODE)
REVERSE INPUT VOLTAGE PROTECTION
2mΩ
BG1
12.1k
IS–
IS+
15nF
RUN
SS
TG1
VOUT
10A
24V
SENSE2+
SENSE2–
BG2
220µF
0.1µF
BOOST2
SW2
ITH
4.7µF
VIN OPERATES THROUGH TRANSIENTS UP TO 75V.
WHEN VIN > 24V, VOUT FOLLOWS VIN UP TO 57V.
3.5µH
SW1
LTC3897
DG
CS
SG
VIN
1µF
PINS NOT SHOWN IN THIS CIRCUIT:
PLLIN/MODE, ILIM, PHASMD,
CLKOUT, EXTVCC, SGEN, DGEN
5mΩ
0.1µF
BOOST1
10nF
8.66k
3.5µH
SENSE1–
549k
SPFB
10Ω
5mΩ
SENSE1+
VBIAS
33µF
0.1µF
24
10k
70
20
LTC3897EUHF
LTC3897IUHF
LTC3897HUHF
30 TG1
100k
BURST EFFICIENCY
POWER LOSS (mW)
1
INTVCC 12
30 CS
RUN 10
SGEN
DRVSET 11
31 DG
DRVUV 7
DGEN
DRVUV 10
32
PHASMD 2
DTC 6
TOP VIEW
The surge stopper controls the gate of an external N-channel
MOSFET to protect against high voltage input transients and
provides inrush current control, overcurrent protection and
output disconnect for the boost converter. The integrated ideal
diode controller drives another N-channel MOSFET to replace a
Schottky diode for reverse input protection and voltage holdup
or peak detection. It controls the forward voltage drop across the
MOSFET and minimizes reverse current flow.
FREQ 1
SENSE1–
39
GND
The boost controller drives two N-channel power MOSFET stages
out-of-phase to reduce input and output capacitor requirements,
allowing the use of smaller inductors than the single-phase
equivalent. Synchronous rectification reduces power loss and
eases thermal requirements.
EFFICIENCY (%)
APPLICATIONS
DGEN
PLLIN/MODE
nn
TG2
INTVCC
DRVCC
VFB
DRVSET
DRVUV FREQ
DTC
475k
3897 TA01a
24.9k
GND
TMR
1nF
Protected by U. S. Patents, including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258.
Switching Regulators—Controllers
LT8390
60V Synchronous 4-Switch Buck-Boost
Controller with Spread Spectrum
FEATURES
DESCRIPTION
4-Switch Single Inductor Architecture Allows VIN Above,
Below or Equal to VOUT
nn Synchronous Switching: Up to 98% Efficiency
nn Proprietary Peak-Buck Peak-Boost Current Mode
nn Wide V
IN Range: 4V to 60V
nn ±1.5% Output Voltage Accuracy: 1V ≤ V
OUT ≤ 60V
nn ±3% Input or Output Current Accuracy with Monitor
nn Spread Spectrum Frequency Modulation for Low EMI
nn High Side PMOS Load Switch Driver
nn Integrated Bootstrap Diodes
nn No Top MOSFET Refresh Noise in Buck or Boost
nn Adjustable and Synchronizable: 150kHz to 650kHz
nn V
OUT Disconnected from VIN During Shutdown
nn Available in 28-Lead TSSOP with Exposed
Pad and 28-Lead QFN (4mm × 5mm)
The LT8390 is a synchronous 4-switch buck-boost DC/DC
controller that regulates output voltage, input or output current from
an input voltage above, below or equal to the output voltage. The
proprietary peak-buck/peak-boost current mode control scheme
allows adjustable and synchronizable 150kHz to 650kHz fixed
frequency operation, or internal ±15% triangle spread spectrum
frequency modulation for low EMI. With a 4V to 60V input voltage
range, 0V to 60V output voltage capability, and seamless low noise
transitions between operation regions, the LT8390 is ideal for
voltage regulator, battery and supercapacitor charger applications in
automotive, industrial, telecom and even battery-powered systems.
nn
The LT8390 provides input or output current monitor and power
good flag. Fault protection is also provided to detect output shortcircuit condition, during which the LT8390 retries, latches off or
keeps running.
Efficiency vs VIN
APPLICATIONS
TG1
4
25 TG2
LSP
5
24 VOUT
LSN
6
VIN
7
INTVCC
8
EN/UVLO
17 VC
TEST 7
16 FB
LOADEN 8
15 SS
20 VC
19 FB
LOADEN 11
18 SS
VREF 12
17 PGOOD
CTRL 13
16 ISMON
90
88
86
LT8390EFE
LT8390IFE
0
10
20
30
40
INPUT VOLTAGE (V)
50
60
8390 TA01b
LT8390EUFD
LT8390IUFD
VIN
4V TO 56V
98% Efficient 48W (12V 4A) Miniature
Buck-Boost Voltage Regulator
6uH
4mΩ
22µF
63V
×2
4.7µF
100V
×2
0.1µF
SW1 LSP
BST1
LSN
VOUT
12V
4A
120µF
16V
15mΩ
BG1
10µF
25V
×2
0.1µF
SW2
BST2
120µF
16V
BG2
GND
15 ISN
PACKAGE
FEFEPACKAGE
28-LEADPLASTIC
PLASTIC TSSOP
28-LEAD
TSSOP
IOUT = 4A
UFD
UFD PACKAGE
PACKAGE
28-LEAD
(4mm×× 5mm)
5mm) PLASTIC
QFNQFN
28-LEAD
(4mm
PLASTIC
21 RT
9
92
9 10 11 12 13 14
22 SYNC/SPRD
TEST 10
ISP 14
18 RT
EN/UVLO 6
23 LOADTG
29
GND
19 SYNC/SPRD
29
GND
94
PGOOD
26 SW2
EFFICIENCY (%)
20 LOADTG
ISMON
27 BST2
3
SW2
LSN 3
ISN
2
SW1
BST2
21 VOUT
ISP
BST1
BG2
BST1
SW1
22 TG2
VREF
28 BG2
96
TG1 1
CTRL
TOP VIEW
98
LSP 2
VIN 4
1
100
28 27 26 25 24 23
INTVCC 5
BG1
BG1
TOP VIEW
Automotive, Industrial,
Telecom Systems
nn High Power Battery-Powered System
nn
TG1
383k
1µF
165k
ISMON
VIN
TG2
LT8390
VOUT
EN/UVLO
ISP
LOADTG
ISN
TEST
IOUT LIMIT 6.7A
1µF
100k
FB
ISMON
SSFM OFF
SYNC/SPRD
CTRL
INTVCC
4.7µF
LOADEN
0.47µF
VREF
SS
0.1µF
PGOOD
RT
VC
100pF
27k
9.09k
SSFM ON
100k
PGOOD
8390 TA01a
100k
400kHz
4.7nF
25
Switching Regulators—Controllers
LT8705A
80V VIN and VOUT Synchronous 4-Switch
Buck-Boost DC/DC Controller
FEATURES
DESCRIPTION
Single Inductor Allows VIN Above, Below, or
Equal to Regulated VOUT
nn V
IN Range 2.8V (Need EXTVCC > 6.4V) to 80V
nn V
OUT Range: 1.3V to 80V
nn Quad N-Channel MOSFET Gate Drivers
nn Synchronous Rectification: Up to 98% Efficiency
nn Input and Output Current Monitor Pins
nn Synchronizable Fixed Frequency: 100kHz to 400kHz
nn Integrated Input Current, Input Voltage, Output Current
and Output Voltage Feedback Loops
nn Improved Light Load Transition from
DCM to FCM
nn Improved IMON_OUT, IMON_IN Offset
TOP VIEW
When Cold
nn Clock Output Usable to Monitor
38 37 36 35 34 33 32
SHDN 1
Die Temperature
The LT8705A is a high performance buck-boost switching regulator
controller that operates from input voltages above, below or equal
to the output voltage. The part has integrated input current, input
voltage, output current and output voltage feedback loops. With a
wide 2.8V to 80V input and 1.3V to 80V output range, the LT8705A
is compatible with most solar, automotive, telecom and batterypowered systems. The LT8705A is an improved pin-compatible
version of the LT8705 and is recommended for new designs. See
LT8705A vs LT8705 in the Applications Information section for
more information.
FBOUT 6
CSNIN
CSPIN
INTVCC
SWEN
VIN
26 SRVO_IIN
39
GND
IMON_OUT 7
24 NC
SS 9
23 BOOST1
CLKOUT 10
22 TG1
SYNC 11
21 SW1
95
20 NC
5
CSP
6
LDO33
7
FBIN
8
FBOUT
9
UHFPACKAGE
PACKAGE
UHF
38-LEAD (5mm × 7mm) PLASTIC QFN
38-LEAD (5mm × 7mm) PLASTIC QFN
34 CSPOUT
SS 12
VIN
36V TO
80V
M1
×2
+
M2
0.22µF
24 SW1
2Ω
×2
GND 16
22 SW2
21 TG2
1
VOUT = 48V
ILOAD = 2A
30
40
50
60
VIN (V)
70
80
0
8705A TA01b
TG1 BOOST1 SW1 BG1 CSP
20 BOOST2
PACKAGE
FEFEPACKAGE
VARIATION: FE38(31)
VARIATION:
FE38(31)
38-LEAD PLASTIC
TSSOP
M4
M3
×2
TO
DIODE
SYNC 14
BG1 17
2
22µH
4.7µF
×4
220µF
×2
26 TG1
GATEVCC 18
3
Telecom Voltage Stabilizer
30 EXTVCC
28 BOOST1
90
80
LT8705AEUHF
LT8705AIUHF
32 CSNOUT
4
85
SW2
4
CSN
TG2
SHDN
BOOST2
36 CSNIN
BG2
37 CSPIN
3
GATEVCC
2
BG1
MODE
IMON_IN
BG2 19
5
25 SRVO_FBIN
VC 8
GND
38 VIN
6
27 SRVO_IOUT
13 14 15 16 17 18 19
1
RT 15
Efficiency and Power Loss
100
28 SRVO_FBOUT
RT 12
INTVCC
CLKOUT 13
29 EXTVCC
FBIN 5
TOP VIEW
VC 11
30 CSNOUT
CSP 3
POWER LOSS (W)
High Voltage Buck-Boost
Converters
nn Input or Output Current
Limited Converters
IMON_OUT 10
31 CSPOUT
CSN 2
LDO33 4
nn
39
GND
The LT8705A includes a MODE pin to select among Burst Mode
operation, discontinuous or continuous conduction mode
at light loads. Additional features include a 3.3V/12mA LDO,
a synchronizable fixed operating frequency, and onboard
gate drivers.
EFFICIENCY (%)
APPLICATIONS
MODE
IMON_IN
nn
1nF
10Ω
1nF
10Ω
CSN
TO
DIODE
10mΩ
0.22µF
2Ω
×2
392k
GND BG2 SW2 BOOST2 TG2
CSNIN
CSPOUT
CSPIN
CSNOUT
EXTVCC
VIN
38-LEAD PLASTIC TSSOP
LT8705AEFE
LT8705AIFE
LT8705AHFE
LT8705AMPFE
100k
SHDN
FBOUT
SWEN
INTVCC
LDO33
SRVO_IIN
SS
SRVO_IOUT
IMON_IN
1µF
4.7µF
4.7µF
SRVO_FBOUT
RT
VC
215k
4.7µF
SRVO_FBIN
FBIN
20k
10k
GATEVCC
LT8705A
MODE
71.5k
+
4.7µF
×6
CLKOUT
SYNC
IMON_OUT
4Ω
TO
TO
BOOST1 BOOST2
56.2k
1µF
220pF
3.3nF
202kHz
8705A TA01
26
VOUT
48V
220µF 5A
×2
Low EMI LED Driver Features 2A, 40V, Integrated,
Synchronous Switches for Automotive Lighting
Design Note 557
Keith Szolusha
right balance of high efficiency and low noise. They
can be run at up to 2.5MHz for compact solutions.
Introduction
The breadth of LED applications has grown to encompass everything from general lighting to automotive,
industrial and test equipment, sign boards and safety
instruments. Feature requirements for LED drivers
have become more extensive. The latest LED solutions require drivers that are compact, efficient, low
noise, and have high dimming ratios and advanced
fault protection. The LT3922 meets these demands.
The tiny LT3922 LED driver features low EMI, high
efficiency and fault protection required in automotive environments. It can handle 36V automotive
transients and 3V cold crank. Its Silent Switcher®
architecture, spread spectrum frequency modulation (SSFM) and controlled switching edges make
it ideal for powering LEDs with low EMI. Its flexible
topology is useful in daytime running lights, signal
lights, taillights, and headlight segments as well as
dashboard and heads-up displays with high dimming
ratios. Built-in fault protection reduces the number of
extra components required to protect against short
and open LEDs.
The LT3922 synchronous LED driver with integrated
2A, 40V switches can be configured as a boost, buck
or boost-buck LED driver. Its high efficiency integrated
switches fit into a tiny 4mm × 5mm QFN package. This
device integrates Linear’s most advanced switching
technologies, condensing high power capability into
tight spaces while controlling the edge rates and mitigating unwanted EMI. The LT3922 features controlled
switching edges that do not ring—offering just the
L, LT, LTC, LTM, Linear Technology, the Linear logo and Silent Switcher are
registered trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
OFF
VIN
4V TO 30V
C4
0.1µF
L1
4.7µH
FERRITE BEAD
FB1
+
VIN
449k
INTVCC
(SSFM ON)
SW
BST
SYNC/SPRD
VOUT
EN/UVLO
GND
OVLO
VOUT
221k
31.6k
ANALOG DIMMING
CTRL
91k
ON
1µF
PWM
EXT OR ON
1M
33.2k
ISN
EXT
PWM
INT
COUT3
2.2µF
50V
2.2µF 300mΩ
PWM
EXT PWM
COUT1, COUT2, C4, C5: 0402
COUT3: 1206
D1: NXP PMEG4010CEJ
FB1: WÜRTH 7427920415
FB2: WÜRTH 742792097
L1: COILCRAFT XAL5050-223MEB
M1: VISHAY Si2319CDS
VREF
INT
COUT1,
COUT2
0.47µF
FB
ISMON
ISP
LT3922
100k
100k
SYNC
0.1µF
1µF
4.7µF
33µF
50V
SYNC
EXT
PWMTG
RP FAULT
332k
FAULT
INTVCC
100k
2.2µF
33nF
SS
RT
M1
VC
45.3k
2MHz
D1
24k
0.22nF
C5
0.1µF
FERRITE BEAD
FB2
LED
34V
330mA
Figure 1. 2MHz Automotive Boost LED Driver Features Low EMI and Internally Generated
PWM Dimming Has 91% Efficiency and Passes CISPR 25 Class 5 EMI
12/16/557
Built-In Features Enable Low EMI
The LT3922 includes a number of features that allow it
to easily achieve low EMI. First, it incorporates Linear’s
patented Silent Switcher architecture, where internal
synchronous switches minimize hot-switching-loop
size and controlled switching edges that do not ring.
Its pinout enables placement of small, high frequency
capacitors near the two VOUT pins to minimize hot-loop
size and EMI. The switching edge rate is controlled
by the IC, eliminating high frequency ringing that is
common to converters without this feature, reducing high frequency EMI without degrading power or
efficiency.
50
0.1µF
+
ANALOG DIMMING
100k
SW
PEAK RADIATED EMI (dBµV/m)
VOUT
GND
91k
OVLO
VOUT
ISP
PWM
RP FAULT
332k
122Hz
100k
FAULT
INTVCC
33nF
2.2µF
SS
45.3k
2MHz
FB
LED–
OPT
D2
Q1
1M
LED
16V MAX
330mA
LED+
FB
71.5k
SYNC/SPRD
VC
RT
FERRITE BEAD
FB2
0.1µF
300mΩ
1µF
ISN
ISMON
PWMTG
FB
VREF
PWM
INT
1000
100k
0.47µF
50V
1µF
0.47µF
50V
EXT
EXT PWM
D1: NXP PMEG4010CEJ
PWM
FB1, FB2: WÜRTH 742792097
EXT
OR ON
FB3: WÜRTH 742792040
(RP DEFEAT)
L1: WÜRTH 744877100 COUPLED
M1: VISHAY Si2319CDS
Q1: ZETEX FMMT591A
D2: OPT FOR LED-TO-GND SHORT PROTECTION
800
4.7µF
25V
0.1µF
BST
LT3922
INT
600
L1B
10µH
CTRL
1µF
400
Conclusion
The LT3922 synchronous LED driver meets the many
demands of automotive and industrial LED drivers.
EN/UVLO
100k
ON
200
The LT3922 boost-buck topology in Figure 3 supports an
input voltage range extending above and below the LED
string voltage. This patented low EMI topology features
a boost-type low ripple input inductor and a buck-type
low ripple output-facing inductor. A 4V to 18V input
can drive an LED string voltage between 3V and 16V.
196k
53.6k
0
The LT3922 can power LEDs up to 34V as a boost
converter. For automotive applications it can be
configured as a highest efficiency 400kHz converter
or a smallest size 2MHz converter with up to 5000:1
PWM dimming range.
0.1µF
VIN
CISPR 25,
CLASS 5 LIMITS
EMI DATA
NOISE FLOOR
0
Figure 2. LT3922 Boost Passes CISPR 25 Class
5 Radiated and Conducted EMI
1µF
499k
33µF
50V
10
dn557 F02
L1A
10µH
4.7µF
20
MHz
Boost, Buck and Boost-Buck
Since LEDs are light sources driven by controlled
current, either or both of LED+ and LED – can be attached to non-ground potentials. This opens options
for LED driver topologies, including boost-buck (stepup and step-down) and buck mode (step-down). The
high side PWMTG driver and low EMI switches can
be configured as boost, buck, or boost-buck LED
drivers while retaining use of all of the IC’s desirable
features—low EMI, SSFM and internal PWM dimming.
FERRITE BEAD
FB3
VIN = 14V
VLED = 32V
ILED = 330mA
f = 2MHz
30
–10
SSFM in the LT3922 spreads the resistor-set switching
frequency up and down from 100% to 125% of its
value. This decreases both peak and average EMI in
the converter at low and high frequencies.
VIN
4V TO 18V
40
OFF
SYNC
EXT
0.1µF
M1
D1
FERRITE BEAD
FB1
SYNC
INTVCC
(SSFM ON)
10k
470pF
Figure 3. 2MHz Boost-Buck LED Driver with Low Input and Output Ripple. Passes CISPR 25 Class 5 EMI
Data Sheet Download
www.linear.com/LT3922
For applications help,
call (408) 432-1900, Ext. 3801
Linear Technology Corporation
DN557 LT/AP 1216 71K • PRINTED IN THE USA
(408) 432-1900
 LINEAR TECHNOLOGY CORPORATION 2016
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
FAX: (408) 434-0507 ● www.linear.com
Bidirectional DC/DC Regulator and
Supercapacitor Charger
Design Note 558
Victor Khasiev
Introduction
The LTC ®3110 bidirectional buck-boost DC/DC regulator charges and balances a supercapacitor when a bus
voltage is present (for example 3.3V) and discharges
the supercapacitor into the load when the bus fails.
The LTC3110 maintains the bus’s nominal level (3.3V in
the example in Figure 1) even if the supercapacitor
voltage is above or below the nominal bus voltage.
Supporting the load this way allows data backup and
retention during a power interruption—important in a
wide variety of industrial and automotive applications.
Industrial applications, however, share something
in common with consumer electronics: the trend
toward increased portability and mobility. Space is
increasingly limited for electronics inside modern
industrial equipment. The volume, in particular the
thickness, of a data storage unit is at a premium in
industrial assemblies and modules. With that in mind,
the solution herein aims to minimize the profiles of
the selected components. Table 1 shows two passive
component group options, arranged by thickness:
1mm and 2.5mm. The required semiconductor parts
are not listed because the controllers, MOSFETs and
resistors do not exceed 1mm thickness.
Low Profile Data Backup Power Supply
Industrial and automotive applications are distinguished by their lack of stable, high quality voltage
sources. In automotive environments, a 12V nominal
voltage rail can change from 4V to above 40V during
cold starts and load dumps. The 24V equipment bus
used in factories and plants suffers voltage spikes
and brownouts just from cycling electric motors and
solenoids.
LOAD RAIL VSYS
3.5V, 1A, NOMINAL
3.2V, 0.2A, BACKUP
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are
registered trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
BAV70W
4.7µF
3.32k
LOAD
VIN
OPTIONAL
Q1
Si2333DDS
Figure 2 shows a low profile energy storage solution for data backup or wireless data transmission
in situations where the input voltage changes in an
extremely wide range from 4V to 40V, with possible
input voltage interruption.
24Ω
866k
1.02MΩ
478k
3.01k
LTC3110EFE
RUN
SW1
VSYS
SW1
VSYS
SW2
SW2
SVSYS
VCAP
MODE
VCAP
VMD
PROG
CS.1
0.6F
L1
5.6µH
+
+
FB
DIR
205k
VCAP
1.9MΩ
FBVCAP
511k
CHRG
SGND
PGND
PGND
CMPIN
RSEN
CAPOK
CMPOUT
100k
Figure 1. LTC3110 Application, VSYS = 3.3V, VCAP = 5.0V
01/17/558
DN5VK2 F01
+
OPT
+
SBR3U60P1
0.1µF
1MΩ
LT8608EMSE
VIN
BST
CIN1.2
1µF
0.01µF
18.2k
2MHz
100µF
4.7µF
L2
2.2µH
EN/RUN
CIN1.1
0.22µF
SYNC
SW
VCC
PG
BAV70W
LOAD
INPUT RAIL
VIN 4V TO 42V
LOAD BUS VSYS
3.5V, 1A, NOMINAL
3.2V, 0.2A, BACKUP
24Ω
866k 3.01k
1MΩ
10pF
FB
TR/SS
1.02M
478k
287k
LTC3110EFE
RUN
SW1
VSYS
SW1
VSYS
SW2
SW2
SVSYS
VCAP
MODE
VCAP
VMD
PROG
CS.1
0.6F
L1
5.6µH
VCAP
+
+
FB
DIR
205k
1.9MΩ
FBVCAP
100k
RT
STORAGE
CAPACITOR
GND
CHRG
SGND
PGND
PGND
CMPIN
RSEN
CAPOK
511k
100k
CMPOUT
DN5VK2 F02
Figure 2. LTC3110, High Voltage Application, VIN = 4V to 40V, VSYS = 3.3V, VCAP = 5.0V
This solution uses two converters to produce a complete industrial/automotive application. The converter,
based on the LTC3110 supercapacitor charger (SCCH),
charges the storage capacitor when the input voltage is
present and provides a regulated system output during
power interruption. Under normal operating conditions,
when a 4V to 40V input supply is present, sensitive
electronic loads and the LTC3110 are supported by
a step-down converter (SDC) based on the LT8608.
voltages are well within the recommended limits for
3.3V logic power supplies. The CHRG flag can be used
to alert digital systems to disconnect non-essential
loads and begin data backup or wireless transmission.
Figure 3 shows the beginning of the switchover process;
with the input voltage disconnected, the SDC turns off
while the SCCH is turning on.
VIN
2V/DIV
VSYS
1V/DIV
The LT8608 is a low quiescent current, high efficiency,
highly integrated synchronous buck converter featuring
a wide input voltage range extending from 3V to 42V.
Its 42V upper limit minimizes the volume required for
system protection circuitry, practically eliminating
the need for traditional transient voltage suppressor
diodes (TVS). The SDC maintains the system voltage
within 3.3V bus rail limits.
Figure 3. Switchover [VSYS Load Voltage,
VIN Input Voltage, CHRG Flag Status]
If the input voltage is disconnected, the SCCH takes
over, powering the regulated 3.3V rail. The LT8608
supplies 3.5V to the system bus under normal circumstances; the LTC3110 supplies 3.2V when it registers
a power failure and supports the load. These supply
Conclusion
LTC3110 is a highly integrated, high performance
supercapacitor charger and balancer, which can be
implemented in low profile solutions for data retention
and backup in automotive and industrial applications.
CHRG
1V/DIV
1ms/DIV
DN5VK2 F03
Table 1. Converter Components for 1mm and 2.5mm Thickness Solutions
Height
L1
L2
CS1
CIN1
Vendor
Wurth Elektronik
Wurth Elektronik
CAP-XX
TDK
1mm
74437321022
74437321056
2 x HS103F
2 x C3216JB1H475K085AB
2.5mm
74437334022
74437334056
HS206F
C3225X7R2A225K230AB
Data Sheet Download
www.linear.com/LTC3110
For applications help,
call (408) 432-1900, Ext. 3161
Linear Technology Corporation
dn558f LT/AP 0117 71K • PRINTED IN THE USA
(408) 432-1900
 LINEAR TECHNOLOGY CORPORATION 2016
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
FAX: (408) 434-0507 ● www.linear.com
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K OREA
CH IN A
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© LT/MC 0217 9.5K · Printed in U.S.A
1630 McCarthy Blvd., Milpitas, CA 95035-7417
1-800-4-LINEAR • 408-432-1900 • 408-434-0507 (Fax) • www.linear.com
Industrial
Wireless Sensor Networking
SmartMesh
®
In a commercial building, factory, smart grid, industrial plant or for transportation, you need a wireless sensor network that
performs in tough RF environments, in extreme environmental conditions, and operates reliably for many years. With over
50,000 customer networks in over 120 countries, SmartMesh is field-proven to deliver >99.999% data reliability and >10 year
battery life. Customers trust SmartMesh to deliver their business-critical data and enable their Industrial IoT businesses.
Features
Reliable Wireless Sensor Network
Streamlines Manufacturing Operations
Learn More
www.linear.com/SmartMesh
• The Only Network Built for Industrial IoT
• Complete Networking Software Speeds
1-800-4-LINEAR
Development
• Engineered for Years of Trouble-Free
Operation
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