ULTRA 1
EVALUATION KIT AVAILABLE
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
General Description
Benefits and Features
The MAX16910 ultra-low quiescent current, high-voltage
linear regulator is ideal for use in automotive and batteryoperated systems. The device operates from a +3.5V to
+30V input voltage, delivers up to 200mA of load current, and consumes only 20µA of quiescent current at
no load. The device consumes only 1.6μA current when
in shutdown. The input is +45V transient tolerant and is
designed to operate under load-dump conditions. The
MAX16910 can be configured as either fixed output voltage (+3.3V or +5V) or adjustable output voltage using an
external resistive divider.
●● Enables System Designers to Meet Stringent Module
Requirements for 100μA Quiescent Current
• Low 20µA Quiescent Current
• Up to 200mA Output-Current Capability
• User-Selectable Output Voltage (+3.3V or +5V
Fixed and +1.5V to +11V Adjustable with
External Resistive Divider)
●● Tiny Output Capacitors Reduce Board Space and
BOM Cost
• Stable Operation with 4.7µF Output Capacitor
The MAX16910 features an open-drain, active-low RESET
output with fixed thresholds offered at 92.5% and 87.5%
of the output voltage. The RESET output remains low for
a fixed period of 60µs after the output voltage exceeds
its threshold. The RESET delay can be extended with an
external capacitor.
●● Accurate RESET Output with Adjustable Delay
Eliminates Need for Separate Reset IC
The MAX16910 includes an enable input, short-circuit
protection, and thermal shutdown. The MAX16910 operates over the -40°C to +125°C automotive temperature
range. The device is available in a space-saving, thermally enhanced, 3mm x 3mm, 8-pin TDFN package and
5mm x 4mm, 8-pin SO package.
• Low-Dropout Voltage of 280mV at 200mA
• +3.5V to +30V Wide Input Voltage Range,
+45V Tolerant
Applications
●● Automotive
●● Industrial
●● Telecom
• Open-Drain RESET Output with Adjustable Delay
• Fixed-Reset Threshold Options: 87.5% or 92.5%
●● Operates Through Cold-Crank Conditions
●● Robust Performance in Automotive Environment
•
•
•
•
Thermal and Short-Circuit Protection
High-Voltage Enable Input (+45V)
Operating -40°C to +125°C Temperature Range
Automotive Qualified
Typical Operating Circuits
Ordering Information/Selector Guide appears at end of data
sheet.
5V FIXED OUTPUT
IN
OUT
1µF
ENABLE
+
-
14V
BATTERY
SETOV
MAX16910
SET
GND
RESET
VCC
4.7µF
10kI
µC
I/O
RESET
TIMEOUT
1nF
(1.25ms DELAY)
Typical Operating Circuits continued on next page.
19-4816; Rev 6; 8/15
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Circuits (continued)
3.3V FIXED OUTPUT
IN
OUT
1µF
ENABLE
+
-
14V
BATTERY
VCC
MAX16910
4.7µF
SETOV
SET
I/O
RESET
RESET
GND
µC
10kI
TIMEOUT
1nF
(1.25ms DELAY)
ADJUSTABLE OUTPUT
IN
OUT
1µF
ENABLE
+
-
14V
BATTERY
R1
MAX16910
SETOV
R2
SET
VCC
4.7µF
10kI
µC
I/O
GND
TIMEOUT
RESET
RESET
1nF
(1.25ms DELAY)
www.maximintegrated.com
Maxim Integrated │ 2
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Pin Configurations
OUT
GND
SETOV
TIMEOUT
TOP VIEW
8
7
6
5
MAX16910
TOP VIEW
IN
1
ENABLE
2
SET
3
+
MAX16910
*EP
RESET 4
*EP
1
2
3
4
IN
ENABLE
SET
RESET
+
8
OUT
7
GND
6
SETOV
5
TIMEOUT
SO
*CONNECT EXPOSED PAD TO GND.
TDFN
*CONNECT EXPOSED PAD TO GND.
www.maximintegrated.com
Maxim Integrated │ 3
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Absolute Maximum Ratings
(All voltages referenced to GND.)
IN, ENABLE, SET.................................................. -0.3V to +45V
OUT, RESET (open-drain output)............................-0.3V to +12V
SETOV, TIMEOUT....................................................-0.3V to +6V
Maximum Current (all pins except IN and OUT)...............50mA
Continuous Power Dissipation (TA = +70°C)
TDFN (derate 24.4mW/°C above +70°C)*.............1951mW
SO (derate 23.3mW/°C above +70°C)*................1861mW
Operating Temperature Range..........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range..............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
*As per JEDEC51 Standard (multilayer board).
Package Thermal Characteristics (Note 1)
TDFN
Junction-to-Ambient Thermal Resistance (qJA)............41°C/W
Junction-to-Case Thermal Resistance (qJC)...................8°C/W
SO
Junction-to-Ambient Thermal Resistance (qJA)............53°C/W
Junction-to-Case Thermal Resistance (qJC)...................7°C/W
Note 1:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Electrical Characteristics
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1μF, COUT = 4.7μF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P
+150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2)
PARAMETER
Supply Voltage Range
SYMBOL
VIN
Supply Current
Shutdown Supply Current
Output Voltage
(5V Fixed Output Setting)
Output Voltage
(3.3V Fixed Output Setting)
Adjustable Output-Voltage Range
SETOV FB Voltage
ISHDN
VOUT50
VOUT33
CONDITIONS
Continuous
www.maximintegrated.com
DVDO
MAX
30
45
ILOAD = 0mA, SET = GND, VOUT = 5V
20
30
ENABLE = GND, TA = +25NC
1.6
3
3
ENABLE = GND, -40NC P TA P +125NC
UNITS
V
FA
FA
1mA P ILOAD P 200mA,
VIN = 6V to 30V (Note 3)
4.9
5.0
5.1
1mA P ILOAD P 50mA,
VIN = 6V to 30V, TJ = +150°C (Notes 3, 4)
4.9
5.0
5.1
1mA P ILOAD P 200mA, VIN = 4.8V to 30V
(Note 3)
3.234
3.3
3.366
1mA P ILOAD P 50mA, VIN = 4.8V to 30V,
TJ = +150°C (Notes 3, 4)
3.234
3.3
3.366
11.0
V
ILOAD = 1mA (Note 4)
1.225
1.25
1.275
V
280
600
V
V
1.5
ILOAD = 200mA, SET = GND, SETOV =
HIGH, VOUT(NORM) = +5.0V
Dropout Voltage (Note 5)
TYP
3.5
For P 400ms
VOUT
VSETOV
MIN
ILOAD = 50mA, SET = GND, SETOV =
HIGH, VOUT(NORM) = +5.0V, TJ = +150°C
(Notes 3, 4)
mV
600
Maxim Integrated │ 4
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Electrical Characteristics (continued)
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1μF, COUT = 4.7μF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P
+150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
Short-Circuit Output Current Limit
ISC
CONDITIONS
Output shorted to GND (MAX16910C__)
MIN
TYP
230
330
MAX
UNITS
mA
Thermal Shutdown
(Note 6)
+180
NC
Thermal Shutdown Hysteresis
(Note 6)
+25
NC
Line Regulation
(5V Fixed Output Setting)
VIN = 6V to 30V, ILOAD = 1mA
1
mV
Line Regulation
(3.3V Fixed Output Setting)
VIN = 4.8V to 30V, ILOAD = 1mA
1
mV
Load Regulation
(5V Fixed Output Setting)
ILOAD = 1mA to 200mA
12
mV
Load Regulation
(3.3V Fixed Output Setting)
ILOAD = 1mA to 200mA
12
mV
Power-Supply Rejection Ratio
PSRR
ILOAD = 10mA, f = 100Hz, 500mVP-P
(Note 6)
60
dB
Startup Response Time
tSTART
Rising edge of VIN to VOUT, ILOAD = 50mA
(Note 6)
160
Fs
TIMEOUT INPUT
TIMEOUT Ramp Current
ITO
TIMEOUT connected to GND
0.600
TIMEOUT Ramp Delay
1.0
1.650
1.25
RESET Default Timeout Period
RESET OUTPUT
RESET Threshold
FA
ms/nF
VOUT rising, TIMEOUT = OPEN
30
60
90
Fs
MAX16910__9/V+, VOUT falling
90
92.5
94
MAX16910__8/V+, VOUT falling
85
87.5
89
% of
VOUT
RESET Threshold Hysteresis
VOUT rising
5
% of
VOUT
OUT to RESET Delay
VOUT falling (Note 6)
4
Fs
RESET Output-Voltage Low
(Open-Drain)
VOL
ISINK = 0.5mA, RESET asserted
RESET Open-Drain Leakage
Current
RESET not asserted, RESET = 7V,
TA = +25NC
RESET Open-Drain Leakage
Current
RESET not asserted, RESET = 7V
0.4
V
1
FA
0.03
FA
ENABLE
ENABLE Logic-Low
VIL
ENABLE Logic-High
VIH
ENABLE Pulldown Current
0.4
2.4
(Note 7)
V
V
0.65
FA
SET INPUT
TA = +25NC
SET Input Current (All Modes)
SET Logic-Low
VILSET
Set Logic-High
VIHSET
www.maximintegrated.com
-50
+50
0.2
TJ = +150NC
FA
0.4
2.4
nA
V
V
Maxim Integrated │ 5
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Electrical Characteristics (continued)
(VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1μF, COUT = 4.7μF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P
+150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2)
PARAMETER
SETOV INPUT (TRI-MODE)
SYMBOL
CONDITIONS
MIN
SET = HIGH, VSETOV = 5V
or SET = GND, VSETOV = 5V
SETOV Input Leakage Current
SETOV Low-Level Input Voltage
VILSETOV
SET = GND, VSETOV < VILSETOV or places
device in +3.3V fixed output-voltage mode
SETOV High-Level Input Voltage
VIHSETOV
SET = GND, VSETOV > VIHSETOV or places
device in +5V fixed output-voltage mode
TYP
MAX
1
FA
0.4
VOUT
- 0.4
UNITS
V
V
Note 2: P
roduction tested at TA = +25°C. Overtemperature limits are guaranteed by ATE characterization between -40°C P TJ ≤
+150°C, unless otherwise noted.
Note 3: Observe the absolute maximum power dissipation limits.
Note 4: Specification characterized up to +150°C operating junction temperature. Limits are guaranteed by bench characterization.
Note 5: Dropout voltage is defined as (VIN - VOUT) when VOUT is 2% below the value of VOUT for VIN = VOUT + 3V.
Note 6: Not production tested.
Note 7: ENABLE is internally pulled to GND.
www.maximintegrated.com
Maxim Integrated │ 6
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
GROUND CURRENT
vs. LOAD CURRENT
ILOAD = 0
27
10
MAX16910 toc02
80
MAX16910 toc01
30
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
VOUT = 3.3V
60
MAX16910 toc03
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
8
15
5
10
15
20
25
2
0
0
30
0
5
10
15
20
25
30
ILOAD (mA)
VIN (V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
RESET THRESHOLD
vs. TEMPERATURE
DROPOUT VOLTAGE vs. LOAD CURRENT
(5V OUTPUT)
6
VIN = 30V
4
VIN = 14V
2
VOUT = 5V
5.2
MAX16910_9/V RISING
4.9
MAX16910_9/V FALLING
4.6
MAX16910_8/V RISING
-25
0
25
50
75
MAX16910_8/V FALLING
TEMPERATURE (NC)
www.maximintegrated.com
100 125 150
TA = +150NC
0.45
0.40
TA = +125NC
0.35
TA = +25NC
0.30
0.25
TA = -40NC
0.20
0.15
0.10
4.3
VIN = 6V
0
0.50
DROPOUT VOLTAGE (V)
8
5.5
MAX16910 toc05
MAX16910 toc04
10
-50
0
20 40 60 80 100 120 140 160 180 200
VIN (V)
RESET THRESHOLD VOLTAGE (V)
0
6
4
20
18
IIN (FA)
TA = +25NC
MAX16910 toc06
21
TA = +125NC
40
IIN (FA)
24
IGND (FA)
IIN (FA)
TA = -40NC
0.05
0
4.0
-50
-25
0
25
50
75
TEMPERATURE (NC)
100 125 150
0
20 40 60 80 100 120 140 160 180 200
LOAD CURRENT (mA)
Maxim Integrated │ 7
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
DROPOUT VOLTAGE vs. LOAD CURRENT
(3.3V OUTPUT)
TA = +25NC
0.15
1.5
0
0.5
0
0
5
10
15
20
25
30
35
0
40
5
10
15
20
25
30
35
VIN (V)
VIN (V)
OUTPUT VOLTAGE
vs. TEMPERATURE
RESET TIMEOUT PERIOD vs.
TEMPERATURE
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
5.01
5.00
4.99
4.98
4.97
4.96
-20
45
40
35
40
80
TEMPERATURE (°C)
www.maximintegrated.com
120
-30
-40
30
-50
25
-60
20
4.95
40
MAX16910 toc12
50
ILOAD = 10mA
VIN = 14V + 0.5VP-P
-10
PSRR (dB)
TIMEOUT PERIOD (Fs)
5.02
CTIMEOUT UNCONNECTED
55
0
MAX16910 toc11
60
MAX16910 toc10
5.03
0
ILOAD = 0mA
SETOV = OUT
SET = GND
1.0
LOAD CURRENT (mA)
IOUT = 10mA
-40
2.5
1.5
ILOAD = 0mA
SETOV = GND
SET = GND
0
20 40 60 80 100 120 140 160 180 200
0
3.0
2.0
0.5
0.05
OUTPUT VOLTAGE (V)
2.0
1.0
0.10
5.04
4.0
VOUT (V)
TA = -40NC
0.20
5.05
4.5
3.5
0.30
0.25
5.0
2.5
VOUT (V)
DROPOUT VOLTAGE (V)
0.35
3.0
MAX16910 toc09
TA = +125NC
0.40
5.5
MAX16910 toc08
TA = +150NC
0.45
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
3.5
MAX16910 toc07
0.50
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
-50
-25
0
25
50
75
TEMPERATURE (NC)
100 125 150
-70
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
Maxim Integrated │ 8
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
RESET OUTPUT VOLTAGE
vs. SINK CURRENT
TIMEOUT PERIOD (ms)
1.2
0.9
0.6
MAX16910 toc14
1000
MAX16910 toc13
RESET OUTPUT VOLTAGE (V)
1.5
RESET TIMEOUT PERIOD vs.
TIMEOUT CAPACITANCE
100
10
1
0.3
0.1
0
0.001
0.01
0.1
1
0.01
10
0.1
LOAD-TRANSIENT RESPONSE
(3V OUTPUT)
LOAD-TRANSIENT RESPONSE
(5V OUTPUT)
1
10
100
CTIMEOUT (nF)
RESET SINK CURRENT (mA)
LINE-TRANSIENT RESPONSE
(5V OUTPUT)
MAX16910 toc16
MAX16910 toc15
MAX16910 toc17
VOUT
(AC-COUPLED)
100mV/div
VOUT
(AC-COUPLED)
100mV/div
180mA
180mA
IOUT
IOUT
10mA
10mA
VOUT
(AC-COUPLED)
200mV/div
28V
200Fs/div
200Fs/div
LINE-TRANSIENT RESPONSE
(3.3V OUTPUT)
6V
2ms/div
POWER-UP RESPONSE
MAX16910 toc18
VIN
POWER-UP RESPONSE
MAX16910 toc19
IOUT = 0A
VIN = VEN
MAX16910 toc20
14V
VIN
14V
0V
VIN
VOUT
(AC-COUPLED)
200mV/div
0V
3.3V
VOUT
3.3V
28V
0V
VOUT
VIN
170mA
IOUT
4.8V
IOUT = 170mA
VEN = VIN
0V
2ms/div
www.maximintegrated.com
40Fs/div
0A
40Fs/div
Maxim Integrated │ 9
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Typical Operating Characteristics (continued)
(VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.)
ENABLE STARTUP RESPONSE
ENABLE STARTUP RESPONSE
MAX16910 toc21
LOAD-DUMP TRANSIENT RESPONSE
MAX16910 toc22
MAX16910 toc23
5V
VEN
0V
3.3V
VOUT
5V
VIN
0V
VOUT
(AC-COUPLED)
100mV/div
0V
3.3V
42V
VOUT
175mA
VIN
0A
IOUT
14V
0A
40Fs/div
100ms/div
40Fs/div
Pin Description
PIN
NAME
1
IN
2
ENABLE
Active-High Enable Input. Force ENABLE high (or connect to IN) to turn the regulator on. Pull
ENABLE low (or leave unconnected) to place the device in a low-power shutdown mode. ENABLE
is internally pulled down to GND through a 0.65FA current sink.
3
SET
Feedback Network Selector. Connect SET to GND when operating the MAX16910 in fixed outputvoltage mode (3.3V or 5V) using the internal feedback network. Connect SET to IN or any voltage
higher than 2.4V when an external feedback network (resistive divider) is used, operating the
MAX16910 in adjustable output-voltage mode.
4
RESET
Active-Low, Open-Drain Reset Output. RESET asserts low when OUT is below the reset threshold,
and remains low for the duration of the reset timeout period after the reset conditions end. RESET
also asserts low when ENABLE is low and during thermal shutdown.
5
TIMEOUT
Reset-Timeout-Period Adjust Input. Internal capacitance produces a 60Fs default delay when
TIMEOUT is left unconnected. Connect a capacitor from TIMEOUT to GND to set a longer timeout
period than default.
6
SETOV
Regulated Output-Voltage Selector. Connect SETOV to OUT for a 5V fixed output, or connect
SETOV to GND for a 3.3V fixed output. SETOV becomes the feedback path when using an external resistive divider for an adjustable output.
7
GND
Ground
8
OUT
Regulator Output. Bypass OUT to GND with a minimum of 4.7FF. Use a low-ESR, ceramic capacitor (X7R, X5R) for optimal performance. The SETOV input controls the output voltage when in fixed
+3.3V or fixed +5V output-voltage mode. Using an external resistive divider between OUT and
SETOV sets adjustable output voltage from +1.5V to +11V.
—
EP
Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane to provide a
low thermal-resistance path from the thermal junction to the PCB. Do not use EP as the only electrical connection to GND.
www.maximintegrated.com
FUNCTION
Regulator Input. Bypass IN to GND with a 1FF (min) low-ESR ceramic capacitor.
Maxim Integrated │ 10
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Functional Diagram
OUT
IN
ENABLE
CONTROL
LOGIC
OVERCURRENT
PROTECTION
THERMAL
PROTECTION
OUTPUTVOLTAGE
SELECT MUX
1.253V
1.156V (92.5%)
or
1.094V (87.5%)
RESET
TIMEOUT
SET
SETOV
RESET
TIMEOUT
MAX16910
GND
Detailed Description
The MAX16910 low-quiescent current, high-voltage linear regulator is ideal for use in automotive and batteryoperated systems. The device operates from an input
voltage of +3.5V to +30V, delivers up to 200mA of load
current, and consumes only 20µA of quiescent current
at no load. The input is +45V tolerant and is designed
to operate under load-dump conditions. The MAX16910
can be user configured as either a fixed output voltage
(+3.3V or +5V) or an adjustable output voltage using an
external resistive divider.
The MAX16910 features an open-drain, active-low RESET
output with fixed thresholds offered at 92.5% and 87.5%
of the output voltage. The RESET output remains low for
a fixed period of 60µs after the output voltage exceeds
its threshold. The RESET delay can be extended with an
external capacitor. The MAX16910 includes an enable
input short-circuit protection and thermal shutdown.
www.maximintegrated.com
Fixed Output-Voltage Mode
The SET and SETOV inputs determine the output mode.
For the 5V fixed output-voltage mode (see the 5V fixed
output circuit in the Typical Operating Circuits), connect SET to GND and SETOV to OUT. For the 3.3V fixed
output-voltage mode (see the 3.3V fixed output circuit in
the Typical Operating Circuits) connect SET to GND and
SETOV to GND.
Adjustable Output-Voltage Mode
For the adjustable output-voltage mode (see the adjustable output circuit in the Typical Operating Circuits),
connect SET to IN or a voltage > 2.4V and connect
SETOV to a resistive divider R1 and R2 between OUT
and GND. An output voltage between 1.5V and 11V can
be selected using the following equation:
VOUT = VSETOV x (1 + R1/R2)
where VSETOV = 1.25V and R2 should be less than or
equal to 100kω.
Maxim Integrated │ 11
MAX16910
ENABLE
ENABLE is an active-high, logic-level enable input that
turns the device on or off. Drive ENABLE high to turn
the device on. An internal 0.65μA pulldown current
keeps the MAX16910 in shutdown mode when driven
by a three-state driver in high-impedance mode, or an
open-drain driver. When in shutdown, the MAX16910
consumes only 1.6μA. ENABLE withstands voltages up
to 45V, allowing it to be driven by high-input level voltages or connected to IN for always-on operation.
Thermal Protection
The MAX16910 features thermal protection. When the
junction temperature exceeds +180°C, an internal thermal sensor turns off the pass transistor, and allows the
device to cool. The thermal sensor turns on the pass
transistor again after the junction temperature cools by
25°C. This results in a cycled output during continuous
thermal-overload conditions. Thermal protection protects
the MAX16910 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum
junction temperature rating of +150°C.
Output Short-Circuit Current Limit
The MAX16910 features a 330mA current limit. The output can be shorted to GND continuously without damage to the device. During a short circuit, the power dissipated across the pass transistor can quickly heat the
device. When the die temperature reaches +180°C, the
MAX16910 turns off the pass transistor and automatically
restarts after the die temperature has cooled by 25°C.
RESET Output
The MAX16910 features an active-low, open-drain reset
output. Once the monitored output voltage exceeds the
reset threshold voltage, RESET remains low for the reset
timeout period and then goes high. RESET changes from
high to low whenever the monitored output voltage drops
below the reset threshold voltage. RESET also asserts
low when ENABLE is low and during thermal shutdown.
Timeout
The MAX16910 features a reset timeout period adjustable
input. The internal capacitance produces a 60µs default
delay when TIMEOUT is left unconnected. Connect a
capacitor from TIMEOUT to GND to set a higher timeout
period than default. Use the following formula to determine the reset timeout capacitor:
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
where CTIMEOUT is in nF, ITO is in μA, and TTIMEOUT is
in ms.
For example, if ITO is 1μA, CTIMEOUT needs to be 8nF to
get a 10ms delay.
Applications Information
Output-Capacitor Selection and Regulator
Stability
For stable operation over the full temperature range,
with fixed 3.3V and 5.0V output voltages, use a low-ESR
4.7μF capacitor. For resistor-programmed output voltages, a 10μF low-ESR ceramic capacitor is recommended
for stable operation. Use larger output-capacitor values
such as 22μF to reduce noise, improve load-transient
response and power-supply rejection. Some ceramic
dielectrics exhibit large capacitance and ESR variations
with temperature. To improve power-supply rejection
and transient response, use a capacitor larger than the
minimum 1μF capacitor between IN and GND.
Available Output-Current Calculation
The MAX16910 provides up to 200mA of continuous
output current. The input voltage range extends to
30V. Package power dissipation limits the amount of
output current available for a given input/output voltage
and ambient temperature. Figure 1 shows the maximum allowable power dissipation for these devices to
keep the junction temperature below +150°C. Figure 1
assumes that the exposed metal pad of the MAX16910 is
soldered to a 1in2 of multilayer copper board. Use Figure
1 to determine the allowable package dissipation for a
given ambient temperature. Alternately, use the following
formulas to calculate the allowable power dissipation PD.
For the TDFN-EP package:

 1.951W for TA ≤ +70°C


PD = 

W
1.951W − 0.0244 × ( TA − 70°C) for + 70°C ≤ TA < +125°C
°C


For the SO-EP package:

 1.861W for TA ≤ +70°C


PD = 

W
 1.861W − 0.0233 °C × ( TA − 70°C) for + 70°C ≤ TA < +125°C

CTIMEOUT = 0.8 x ITO x TTIMEOUT
www.maximintegrated.com
Maxim Integrated │ 12
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
After determining the allowable power dissipation, calculate the maximum allowable output current, without
exceeding the +150°C junction temperature, using the
following formula:
IOUT(MAX)
=
PD
VIN − VOUT
Example 1 (TDFN-EP Package):
TA = +125°C, VIN = 16V, VOUT = 3.3V
Calculate the maximum allowable power dissipation at
the given temperature as follows:
W
× (125°C − 70=
°C)
°C
609mW
And establish the maximum output current:
609mW
≅ 48mA
16V − 3.3V
=
I OUT(MAX)
The reset timeout period is adjustable to accommodate
a variety of microprocessor applications. Adjust the
reset timeout period by connecting a capacitor between
TIMEOUT and GND.
t RP =
The above equations do not include the negligible power
dissipation from self-heating due to the device ground
current.
=
PD 1.951W − 0.0244
Selecting Timeout Capacitor
1.25 × C TIMEOUT
I TO
where tRP is in ms and CTIMEOUT is in nF.
Leave TIMEOUT unconnected to select the internally
fixed timeout period. CTIMEOUT must be a low-leakage
(< 10nA) type capacitor. Ceramic capacitors are recommended; do not use capacitor values lower than 100pF
to avoid the influence of parasitic capacitances.
Exposed Pad
The MAX16910 package features an exposed thermal
pad on its underside that should be used as a heatsink.
This pad lowers the package’s thermal resistance by
providing a direct heat-conduction path from the die
to the PCB. Connect the exposed pad and GND to the
system ground using a large pad or ground plane, or
multiple vias to the ground plane layer.
Example 2 (TDFN-EP Package):
TA = +50°C, VIN = 9V, VOUT = 5V
2.4
2.0
1.8
PD = 1.951W
1.951W
IOUT(MAX) =
=
488mA ⇒ IOUT(MAX) =
ISC = 330mA (typ)
9V − 5V
1.861W
8-PIN SO-EP
1.6
DERATE
24.4mW/°C
1.4
PD (W)
Find the maximum output current:
1.951W
8-PIN TDFN-EP
2.2
Calculate the maximum allowable power dissipation at
the given temperature as follows:
1.2
DERATE
23.3mW/°C
1.0
0.8
In Example 2, the maximum output current is calculated
as 488mA. The allowable output current cannot exceed
the given internal current limit for the device of 330mA
(typ).
0.6
0.4
0.2
0
0
20
40
60
80
100
120
140
TEMPERATURE (°C)
Figure 1. Calculated Maximum Power Dissipation vs. Ambient
Temperature
www.maximintegrated.com
Maxim Integrated │ 13
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Ordering Information/Selector Guide
PART
RESET THRESHOLD
PIN-PACKAGE
TOP MARK
MAX16910CATA8/V+
87.5
8 TDFN-EP*
(3mm x 3mm)
+BLW
MAX16910CATA9/V+
92.5
8 TDFN-EP*
(3mm x 3mm)
+BLV
MAX16910CASA8/V+
87.5
8 SO-EP*
(5mm x 4mm)
—
MAX16910CASA9/V+
92.5
8 SO-EP*
(5mm x 4mm)
—
MAX16910CATA8+
87.5
8 TDFN-EP*
(3mm x 3mm)
+BOW
MAX16910CATA9+
92.5
8 TDFN-EP*
(3mm x 3mm)
+BOV
MAX16910CASA8+
87.5
8 SO-EP*
(5mm x 4mm)
—
MAX16910CASA9+
92.5
8 SO-EP*
(5mm x 4mm)
—
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*EP = Exposed pad.
Chip Information
PROCESS: BiCMOS DMOS
Package Information
For the latest package outline information and land patterns, go
to www.maximintegrated.com/packages. Note that a “+”, “#”,
or “-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE
TYPE
www.maximintegrated.com
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 TDFN-EP
T833+2
21-0137
90-0059
8 SO-EP
S8E+12
21-0111
90-0150
Maxim Integrated │ 14
MAX16910
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
0
7/09
Initial release
1
10/10
Added a junction temperature range of -40°C to +150°C in the Features section,
updated Electrical Characteristics table with +150°C junction temperature in “5V
Output Voltage,” “3.3V Output Voltage,” and “Dropout Voltage” parameters, added
new Note 4, updated TOC 10 and Figure 1
1, 4, 5, 6, 8, 13
2
7/11
Removed the typ value from the “Dropout Voltage” ILOAD = 50mA parameter in the
Electrical Characteristics table
4
3
4/12
Added consumer-grade products to data sheet
4
6/14
Updated Package Thermal Characteristics section for SO package
4
5
10/14
Updated Junction-to-Case Thermal Resistance in Package Thermal Characteristics
section
4
6
8/15
Updated the Benefits and Features section
1
DESCRIPTION
—
1,14
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2015 Maxim Integrated Products, Inc. │ 15
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement