AMS AS1345A Datasheet
إعلان
إعلان
General Description
Figure 1:
Available Products
Devices
AS1345A
AS1345B
AS1345C
AS1345D
AS1345
18V, High Efficiency, DC/DC Step-Up
Converter
The AS1345 high efficiency DC/DC step-up converter contains an internal N-channel and an internal P-channel output isolation switch.
The device operates from a 2.9V to 5.0V supply and can boost voltages up to 18V.
A hysteretic control scheme is used to provide the highest operating efficiency over a wide range of input and output load conditions. The internal MOSFET switches reduce the external component count and a high switching frequency allows the use of tiny surface mount components.
The AS1345 employ a factory set current limit to reduce ripple and external component size in low output current applications. With a 500mA current limit the AS1345 is capable of providing 20mA @ 18V output.
Peak Coil Current
100mA
200mA
350mA
500mA
Output
Adjustable or fixed
Adjustable or fixed
Adjustable or fixed
Adjustable or fixed
Built-in safety features protect the internal switches and output components from fault conditions. Additional power-saving attributes include a very low quiescent current and a true shutdown mode.
and
Content Guide appear at end of
datasheet.
ams Datasheet
[v1-56] 2016-Dec-28
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Figure 2:
Added Value of Using AS1345
Benefits
•
Supports Lithium primary and re-chargeable batteries
•
Supports a variety of end applications
•
Allows optimization of circuit depending on output power demands
•
Battery life improved
•
Battery supply isolated during shutdown
•
Fault tolerant
•
Small chipscale package
AS1345 −
General Description
Key Benefits & Features
The benefits and features of AS1345, 18V, High Efficiency,
DC/DC Step-Up Converter are listed below:
Features
•
Input Voltage Range: 2.9V to 5.0V
•
Adjustable Output Voltage Range: 5.0V to 18V
•
Output Current up to 40mA
•
Inductor Peak Currents: 100, 200, 350 and 500 mA
•
90% Efficiency
•
True Shutdown
•
Short Circuit and Thermal Protection
•
Packages:
• 8-pin (2x2mm) TDFN
• 8-bumps (1.570mm x 0.895mm) WL-CSP with 0.4mm pitch
Applications
The AS1345 is ideal for:
•
Small and low current demand LCD panels as well as for polymer LEDs (OLED)
•
Cell phones, PDAs
•
Readers
•
Mobile terminals
•
3D shutter glasses
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AS1345 −
General Description
Block Diagram
The functional blocks of this device are shown below:
Figure 3:
AS1345 Block Diagram
Fixed Output Voltage
VDD = 2.9V to 5.0V
10uF
SWIN
EN
VDD
Die
Temperature
Monitor
AS1345
Driver
&
Control
Logic
ILIM
+
-
-
+
+
+
1.25V
+
1.125V
+
-
Adjustable Output Voltage
VDD = 2.9V to 5.0V
10uF
SWIN
EN
VDD
Die
Temperature
Monitor
AS1345
Driver
&
Control
Logic
ILIM
+
-
-
+
+
+
1.25V
+
1.125V
+
-
SWOUT
10uH
LX
10uF
D1
FB
POK
100k
VDD
POK
Vout = 5.0V to 18V
1uF to 10uF
GND
SWOUT
10uH
LX
10uF
D1
R2
FB
POK
VDD
100k
R3
POK
47pF
Vout = 5.0V to 18V
1uF to 10uF
GND
ams Datasheet
[v1-56] 2016-Dec-28
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AS1345 −
Pin Assignment
Pin Assignment
Figure 4:
Pin Diagram (Top View)
VDD 1
EN 2
FB 3
POK 4
AS1345
TDFN 8-pin
2x2mm
8 GND
7 LX
6 SWOUT
5 SWIN
B1
GND
B2
LX
B3
SWOUT
B4
SWIN
A3
FB
A4
POK
A1
VDD
A2
EN
Pin A1 indicator
Figure 5:
Pin Description
Pin Number
TDFN WLP
Pin Name
1 A1 VDD
2
3
4
5
A2
A3
A4
B4
EN
FB
POK
SWIN
Description
Supply Voltage
. Connect to a 2.9V to 5.0V input supply. Bypass this pin with a 10μF capacitor.
Enable Pin
. Logic controlled shutdown input, 1.8V CMOS compatible;
1 = Normal operation
0 = Shutdown
On request a 100k
Ω
pull-down resistor can be enabled (factory set).
Feedback Pin
. Feedback input to the gm error amplifier.
For an adjustable output voltage connect a resistor divider to this pin.
The output can be adjusted from 5.0V to 18V by:
V
OUT
= V
REF
x (1 + R2/R3)
If the fixed output voltage version is used, connect this pin to V
OUT
.
POK
. Open Drain Output. POK remains low while V
OUT
is less than 90% of nominal V
OUT
. Connect a 100k
Ω
pull-up resistor from this pin to V
DD
.
Shutdown Disconnect Switch In
. Input pin of the internal P-channel
MOSFET.
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[v1-56] 2016-Dec-28
AS1345 −
Pin Assignment
Pin Number
TDFN WLP
Pin Name
6
7
8
B3
B2
B1
Description
SWOUT
LX
GND
Shutdown Disconnect Switch Out
. Output pin of the internal
P-channel MOSFET. Connect to power inductor and decouple to GND with a 10μF low ESR ceramic capacitor.
When the input disconnect feature is not desired, SWOUT should be connected to SWIN and VDD.
Inductor.
The drain of the internal N-channel MOSFET. Connect to power inductor and to anode of a schottky diode.
Ground
ams Datasheet
[v1-56] 2016-Dec-28
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Absolute Maximum Ratings
AS1345 −
Absolute Maximum R atings
Stresses beyond those listed in the table below 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
is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Figure 6:
Absolute Maximum Ratings
Parameter Min Max Unit Comments
VDD, SWIN, SWOUT to GND
LX, FB to GND
Junction temperature
Storage temperature range
WL-CSP
TDFN
WL-CSP
-0.3
-0.3
-55
-55
Electrical Parameters
7 V
20 V
Input Current (latch-up immunity)
SWIN to SWOUT Current Limit
-100 100 mA JEDEC 78
1 A
Electrostatic Discharge
Electrostatic Discharge HBM ±2 kV MIL 883 E method 3015
Temperature Ranges and Storage Conditions
110
125
150
60
ºC
ºC
ºC
Package thermal data
TDFN 97
ºC/W
Junction-to-ambient thermal resistance is very dependent on application and board-layout. In situations where high maximum power dissipation exists, special attention must be paid to thermal dissipation during board design.
IPC/JEDEC J-STD-020
Package body temperature
WL-CSP
260 ºC
IPC/JEDEC J-STD-020
Relative humidity non-condensing
5 85 %
Moisture sensitivity level
WL-CSP
TDFN
1
1
Represents an unlimited floor life time
Represents an unlimited floor life time
Note(s):
1. The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020“Moisture/Reflow
Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”.
2. The lead finish for Pb-free leaded packages is “Matte Tin” (100% Sn).
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ams Datasheet
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AS1345 −
Electrical Characteristics
Electrical Characteristics
All limits are guaranteed. The parameters with Min and Max values are guaranteed by production tests or SQC (Statistical
Quality Control) methods.
Figure 7:
V
DD
= V
SHDNN
= V
SWIN
= 3.7V, V
OUT
= 15V, CIN = COUT = 10μF, Typical Values @ T
AMB
= 25ºC
(unless otherwise specified)
Symbol
T
AMB
T
J
Parameter
Operating temperature range
Operating junction temperature range
V
DD
V
UVLO
V
OUT
Supply voltage range
Minimum startup voltage
V
DD
undervoltage lockout
Adjustable output voltage range
Feedback voltage tolerance
Conditions Min
-40
-40
Input
SWIN connected to VDD
VDD = SWIN
V
DD
decreasing (50mV
Hysteresis)
Regulation
External FB divider
Tolerance of FB resistors not included
2.9
5
-3
Typ
2.7
2.7
Max
85
110
5.0
18
Units
°C
°C
V
V
V
V
%
V
FB
η
Fixed output voltage
Feedback voltage
Feedback input current
Line regulation
Load regulation
Efficiency
Internal FB divider
For adjustable V
OUT
only
VDD = 3.5V to 3.7V
V
OUT
= 15V, I
LOAD
= 0mA to
5mA
L = 22μH, V
DD
= V
SWIN
=
3.7V, V
OUT
= 15V,
I
LOAD
= 10mA
3
12
15
17
1.25
10
200
1000
50
90
V
%
V nA mV mV
ams Datasheet
[v1-56] 2016-Dec-28
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AS1345 −
Electrical Characteristics
Symbol Parameter Conditions
Operating Current
Min Typ Max Units
I
R
V
V
I
R
I
I
SHDN
I
I
Q
DDLOAD
LIMIT
NMOS
PMOS
SHDNH
SHDNL
SHDN
PRE
Shutdown current @ VDD
Shutdown current @ SWIN
Quiescent current
Load current
Coil peak current limit
NMOS resistance
PMOS resistance
POK output voltage ‘low’
POK output voltage ‘high’
POK output high leakage current
POK threshold
SHDN input ‘high’
SHDN input ‘low’
SHDN input current
Pre-charge current
Thermal shutdown
Thermal shutdown hysteresis
V
SHDNN
= 0V μA
No switching, V
FB
= 1.5V
V
OUT
= 15V, I
LOAD
= 5mA
AS1345A
AS1345B
AS1345C
AS1345D
Switches
25
25
100
200
350
500
0.3
0.15
POK Output
POK sinking 1mA
POK leakage 1μA
POK = 3.7V
Rising edge, referenced to
V
OUT(NOM)
Shutdown
VDD
0.01
0.2
VDD
- 0.1
1
90
V
V
μA
%
2.9V < V
DD
< 5.0V, no load
1.26
-1
0.55
1
Ω
Ω
V
V
μA
μA mA mA mA mA mA
Soft Start
1
1
100 mA
Thermal Shutdown
150
10
°C
°C
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AS1345 −
Typical Operating Characteristics
Typical Operating
Characteristics
V
OUT
= 15V
Figure 8:
Efficiency vs. I
OUT
; V
IN
= 2.7V, I
LIMIT
= 100mA
100
90
80
70
60
50
40
30
20
10
0
0.1
1 10
Output Current (mA)
- 40°C
+ 25°C
+ 85°C
100
Figure 9:
Efficiency vs. I
OUT
; V
IN
= 2.7V, I
LIMIT
= 500mA
100
90
80
70
60
50
40
30
20
10
0
0.1
1 10
Output Current (mA)
- 40°C
+ 25°C
+ 85°C
100
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AS1345 −
Typical Operating Characteristics
Figure 10:
Efficiency vs. I
OUT
; V
IN
= 4.5V, I
LIMIT
= 100mA
100
90
80
70
60
50
40
30
20
10
0
0.1
1 10
Output Current (mA)
- 40°C
+ 25°C
+ 85°C
100
Figure 11:
Efficiency vs. I
OUT
; V
IN
= 4.5V, I
LIMIT
= 500mA
100
90
80
70
60
50
40
30
20
10
0
0.1
1 10
Output Current (mA)
- 40°C
+ 25°C
+ 85°C
100
ams Datasheet
[v1-56] 2016-Dec-28
AS1345 −
Typical Operating Characteristics
Figure 12:
Efficiency vs. V
IN
; I
LOAD
= 5mA, I
LIMIT
= 100mA
100
90
80
70
60
50
40
30
20
10
0
2.5 2.75
3 3.25 3.5 3.75
4 4.25 4.5
Input Voltage (V)
Figure 13:
Efficiency vs. V
IN
; I
LOAD
= 5mA/20mA, I
LIMIT
= 500mA
100
90
80
70
60
50
40
30
20
10
Iout = 5mA
Iout = 20mA
0
2.5 2.75
3 3.25 3.5 3.75
4 4.25 4.5
Input Voltage (V)
ams Datasheet
[v1-56] 2016-Dec-28
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AS1345 −
Typical Operating Characteristics
Figure 14:
V
OUT
vs. I
OUT
; V
IN
= 2.7V, I
LIMIT
= 100mA
20
19
18
17
16
15
14
13
12
11
10
0 2 4
- 40°C
+ 25°C
+ 85°C
6 8 10 12 14 16 18
Output Current (mA)
Figure 15:
V
OUT
vs. I
OUT
; V
IN
= 4.5V, I
LIMIT
= 100mA
20
19
18
17
16
15
14
13
12
11
- 40°C
+ 25°C
+ 85°C
10
0 2 4 6 8 10 12 14 16 18 20
Output Current (mA)
ams Datasheet
[v1-56] 2016-Dec-28
AS1345 −
Typical Operating Characteristics
Figure 16:
V
OUT
vs. I
OUT
; V
IN
= 4.5V, I
LIMIT
= 500mA
20
19
18
17
16
15
14
13
12
11
10
0
- 40°C
+ 25°C
+ 85°C
5 10 15 20 25 30 35 40
Output Current (mA)
ams Datasheet
[v1-56] 2016-Dec-28
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Detailed Description
AS1345 −
Detailed Description
The AS1345 is a compact step-up DC/DC converters that operates from a 2.9V to 5.0V supply. Consuming only 25μA of
Quiescent current. These devices include an internal MOSFET switch with a low on-resistance. A true shutdown feature disconnects the battery from the load and reduces the supply current to 0.05μA (typ). These DC/DC converters are available with either a fixed output or are adjustable up to 18V. Four current-limit options are available: 100mA, 200mA, 350mA and
500mA.
Figure 17:
Typical Application Diagram
VDD = 2.9V to 5.0V
10uF 100k
10uF
10uH to 22uH
VDD
POK
SWIN
AS1345
SWOUT
LX
FB
47pF
ON EN GND
OFF
Vout = 5.0V to 18V
R2
R3
1uF to 10uF
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Modes of Operation
The AS1345 features an advanced current-limited control scheme operating in hysteretic mode. An internal P-channel
MOSFET switch connects VDD to SWIN to provide power to the inductor when the converter is operating. When the converter is shut down, this switch disconnects the input supply from the inductor
(see Figure 17) . To boost the output voltage an
N-channel MOSFET switch turns on and allows current to ramp up in the inductor. Once this current reaches the current limit, the switch turns off and the inductor current flows through D1 to supply the output. The switching frequency varies depending on the load and input voltage and can be up to
10kHz.
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AS1345 −
Detailed Description
ams Datasheet
[v1-56] 2016-Dec-28
Shutdown
Drive EN low to enter shutdown mode. During shutdown the supply current drops to 0.05μA (typ), the output is dis-connected from the input, and LX enters a high impedance state. The capacitance and load at the output set the rate at which V
OUT
decays. EN can be pulled as high as 6V regardless of the input and output voltages.
With a typical step-up converter circuit, the output remains connected to the input through the inductor and output rectifier, holding the output voltage to one diode drop below
V
DD
when the converter is shutdown and allowing the output to draw power from the input.
The AS1345 features a True-Shutdown mode, disconnecting the output from the input with an internal P-channel MOSFET switch when shut down. This eliminates power draw from the input during shutdown mode.
Start-up and Inrush Limiting
If the ENABLE pin is high, the AS1345 uses a multi-stage start-up sequence. With increasing supply voltage, first the power-on circuitry becomes active and some internal blocks are initiated.
If the supply exceeds the under-voltage-lockout threshold
(2.7V typ), the pre-charge-phase is initiated. The capacitor at the SWOUT pin is charged to V
IN
, and the capacitor at V
OUT
is charged to V
IN
-VSD. During this phase the current is limited to
100mA typical. After the completion of the pre-charge-phase, the AS1345 enters into switching mode. Here the specified current-limit I
PEAK
is used. The circuit operates at maximum frequency until the desired V
OUT
is reached. Then AS1345 switches to normal hysteretic operation mode.
If the load current is too high (>50mA) during the start-up-phase, the attainment of normal operation mode might be delayed or not done at all.
Adjustable Output Voltage
The output voltage of the AS1345 is adjustable from 5.0V to 18V by using a resistor voltage-divider (see
and
Figure 19 ). Select R1 from 10k
Ω
to 600k
Ω
and calculate R2 with the following equation:
V
OUT
= V
REF
(1 + R
2
/R
3
)
(EQ1)
Where:
V
REF
= 1.25V
V
OUT
can range from 5.0V to 18V
For best accuracy, ensure that the bias current through the feedback resistors is at least 2μA.
The AS1345 can also be used with a fixed output voltage. When using one of these parts, connect FB directly to the output
(see
and
).
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AS1345 −
Detailed Description
For improved regulation speed and lower ripple C3 should be applied. For best ripple performance always the adjustable variant of the AS1345 together with C3 should be used. Other measures to reduce the ripple could be to select a low peak current I
PEAK
and increase C4 and to decrease the value of L.
Figure 18:
AS1345 with Adjustable Output Voltage, with Output Disconnect
VDD = 2.9V to 5.0V
10uF 100k
10uF
10uH to 22uH
VDD
POK
SWIN
AS1345
SWOUT
LX
FB
47pF
ON EN GND
OFF
Vout = 5.0V to 18V
R2
R3
1uF to 10uF
Figure 19:
AS1345 with Adjustable Output Voltage, without Output Disconnect
VDD = 2.9V to 5.0V
10uF 100k
10uH to 22uH
VDD
POK
SWIN
AS1345
SWOUT
LX
FB
ON EN GND
47pF
OFF
Vout = 5.0V to 18V
R2
R3
1uF to 10uF
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AS1345 −
Detailed Description
Figure 20:
AS1345 with Fixed Output Voltage, with Output Disconnect
VDD = 2.9V to 5.0V
10uF 100k
10uF
10uH to 22uH
VDD
POK
SWIN
AS1345
SWOUT
LX
FB
ON EN GND
OFF
Vout = 5.0V to 18V
1uF to 10uF
Figure 21:
AS1345 with Fixed Output Voltage, without Output Disconnect
VDD = 2.9V to 5.0V
10uF 100k
10uH to 22uH
VDD
POK
SWIN
AS1345
SWOUT
LX
FB
ON EN GND
OFF
Vout = 5.0V to 18V
1uF to 10uF
ams Datasheet
[v1-56] 2016-Dec-28
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AS1345 −
Detailed Description
Power OK Operation
If desired the POK functionality can be used. In this case a resistor R1 (~100k) has to be applied between the POK pin and
VIN, because the POK output is an open drain type. If the POK functionality is not used the pin should be unconnected.
During shut-down the POK pin is high impedance to save current. Therefore it shows VIN if connected to VIN with a resistor or is floating otherwise. During start-up the POK goes to LOW. During normal operation it is usually HIGH but it goes to LOW if for some reason VOUT drops below 90% of the nominal output voltage.
Thermal Shutdown
To prevent the AS1345 from short-term misuse and overload conditions the chip includes a thermal overload protection. To block the normal operation mode all switches will be turned off. The device is in thermal shutdown when the junction temperature exceeds 150°C typ. To resume the normal operation the temperature has to drop below 140°C typ. A good thermal path should be provided to dissipate the heat generated within the package, especially at higher output power. To dissipate as much heat as possible from the package into a copper plane with as much area as possible, it’s recommended to use multiple vias in the printed circuit board.
Continuing operation in thermal overload conditions may damage the device, and therefore, is considered a bad practice.
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ams Datasheet
[v1-56] 2016-Dec-28
AS1345 −
Detailed Description
Inductor Selection
For best efficiency, choose an inductor with high frequency core material, such as ferrite, to reduce core losses. The inductor should have low DCR (DC resistance) to reduce the I²R losses, and must be able to handle the peak inductor current without saturating. A 10μH to 22μH inductor with greater than 500mA current rating and less than 500m
Ω
DCR is recommended.
When smaller peak currents are selected, the inductor current specification can be reduced accordingly.
Figure 22:
Recommended Inductors
Part Number
ELJLA100KF
ELJLA220KF
ELJPA100KF2
ELJPA220KF2
ELJPA100KF
ELJPA150KF
ELJPA220KF
ELJPC100MF3
ELJPC220MF3
LQH32PN100MNO
LQH32PN150MNO
LQH32PN220MNO
LQH3NPN100NGO
LQH3NPN150NGO
LQH3NPN220NGO
LQH2MCN100M52
LQH2MCN150M52
LQH2MCN220M52
Value
10μH
15μH
22μH
10μH
22μH
10μH
15μH
22μH
15μH
22μH
10μH
15μH
22μH
10μH
10μH
22μH
10μH
22μH
Current Resistance
600mA
420mA
400mA
290mA
240mA
220mA
185mA
140mA
100mA
750mA
600mA
500mA
500mA
370mA
340mA
200mA
150mA
130mA
1.22
Ω
0.38
Ω
0.57
Ω
0.81
Ω
0.38
Ω
0.91
Ω
1.1
Ω
2.27
Ω
3.5
Ω
5.5
Ω
0.71
Ω
1.9
Ω
0.35
Ω
0.66
Ω
0.5
Ω
0.74
Ω
1.15
Ω
0.58
Ω
Size (ins)
1212
1212
1212
0806
1008
1210
1210
1210
0806
0806
1210
1210
1210
1008
1210
1210
1210
1210
Supplier
Panasonic www.panasonic.com
Murata
Manufacturing
Company www.murata.com
ams Datasheet
[v1-56] 2016-Dec-28
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AS1345 −
Detailed Description
Capacitor Selection
The convertor requires three capacitors. Ceramic X5R or X7R types will minimize ESL and ESR while maintaining capacitance at rated voltage over temperature. The V
IN
capacitor should be
10μF. The V
OUT
capacitor should be between 1μF and 10μF. A larger output capacitor should be used if lower peak to peak output voltage ripple is desired. A larger output capacitor will also improve load regulation on V
OUT
. See table below for a list of capacitors for input and output capacitor selection.
Figure 23:
Recommended Capacitors
Part Number
GRM31CR71E106KA12L
GRM31CR71C106KAC7L
GRM31CR71A106KA01L
GRM21BR70J106KE76L
GRM31CR71E475KA88L
GRM21BR71C475KA73L
GRM188R71E105KA12D
GRM188R71C105KA12D
Value Voltage TC Code
4.7μF
4.7μF
1μF
1μF
10μF
10μF
10μF
10μF
25V
16V
25V
16V
25V
16V
10V
6.3V
X7
X7
X7
X7
X7
X7
X7
X7
Size (ins)
1206
0805
0603
0603
1206
1206
1206
0805
Supplier
Murata
Manufacturing
Company www.murata.com
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ams Datasheet
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AS1345 −
Detailed Description
Schottky Diode Selection
The selection of the external diode depends on the application.
If I
OUT
is very low most of the time, and V
OUT
is high, select a diode with a low reverse current for best efficiency. For lower
V
OUT
and higher I
OUT
, select a diode with a lower V
FORWARD
and
R
FORWARD
.
Figure 24:
Recommended Diodes
Part
Number
MBR0540
B140HW
PMEG2010AEB
CRS04
CRS06
Reverse
Voltage
Average
Rectified
Current
Forward
Voltage
Reverse
Leakage
Current
Package
40V
40V
20V
40V
20V
500mA
1000mA
1A
1A
1A
460mV @
500mA
1μA @ 20V
460mV @
500mA
200mV @
500mA
450mV @
500mA
325mV @
500mA
0.35μA @
20V
320μA @
20V
40μA @
20V
250μA @
20V
Supplier
SOD123
Fairchild
Semiconductor www.fairchildsemi.com
SOD123
SOD523
Diodes Inc www.diodes.com
NXP Semiconductors www.nxp.com
3-2A1A
(Toshiba)
Toshiba www.toshiba-compone
3-2A1A nts.com
(Toshiba)
ams Datasheet
[v1-56] 2016-Dec-28
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AS1345 −
Detailed Description
PCB Layout
Carefully printed circuit layout is important for minimizing ground bounce and noise. Keep the GND pin and ground pads for the input and output capacitors as close together as possible. Keep the connection to LX as short as possible. Locate the feedback resistors as close as possible to the FB pin and keep the feedback traces routed away from noisy areas such as
LX.
EMI and overall performance quality are affected by the PCB layout. The high speed operation of the AS1345 demands careful attention to board layout. Stated performance will be difficult to achieve with careless layout.
identifies the high current paths during an operation cycle involving the switching of the N-channel and P-channel internal switches.
The current paths between SWIN, VIN, C1, C2, C4, L1, D1 and
GND should be short and wide for lowest intrinsic resistive loss and lowest stray inductance.
A large ground pin copper area will help to lower the chip temperature. A multilayer board with a separate ground plane is ideal, but not absolutely necessary.
Figure 25:
AS1345 - Inductor Current Paths
SWIN
SWOUT
AS1345
L1
LX
D1
VBAT
C2 C1
VDD
PDRV
NDRV
FB
ILIM
FB
GND
0V
R2
R3
C3
VOUT
RLOAD
0V
Inductor Current Path NMOS-ON, D1-OFF
Inductor Current Path NMOS-OFF, D1-ON
Load Current Path NMOS-OFF, D1-OFF
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ams Datasheet
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AS1345 −
Package Drawings & Markings
Package Drawings & Markings
The product is available in a 8-pin (2x2) TDFN and 8-bump
(1.570mm x 0.895mm) WL-CSP package.
Figure 26:
8-bump WL-CSP with 0.4mm Pitch
Die size excluding the scribeline: 1570 x 895µm zz
XXXX
Dimensions Min [
μ
m] Nom [
μ
m] Max [
μ
m]
Package x-dimension
Package y-dimension
Package height
Bump height
Bump Diameter
1595
920
570
180
260
1615
940
600
200
270
1635
960
630
220
280
RoHS
Green
Note(s):
1. ccc Coplanarity.
2. All dimensions in μm.
ams Datasheet
[v1-56] 2016-Dec-28
Figure 27:
Package Marking
Tracecode
XXXX
Marking Code
zz
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AS1345 −
Pack age Drawings & Mark ings
Figure 28:
8-pin (2x2) TDFN Package
zz
XXX
RoHS
Green
Note(s):
1. Dimensions & tolerancing conform to
ASME Y14.5M-1994
.
2. All dimensions are in millimeters. Angles are in degrees.
3. Coplanarity applies to the terminal.
4. Radius on terminal is optional.
5. N is the total number of terminals.
Figure 29:
Package Marking
Trace Code
XXX
Symbol Min Nom Max
aaa bbb ccc ddd eee
N
E e b
D
A
A1
A3
L
-
-
-
-
-
0.51
0.00
-
0.45
0.15
0.55
0.02
-
0.55
0.20
2.00 BSC
2.00 BSC
0.50 BSC
0.15
0.10
0.10
0.05
0.08
8
-
-
-
-
-
0.60
0.05
0.22
0.65
0.25
Marking Code
zz
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ams Datasheet
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AS1345 −
Ordering & Contact Information
Ordering & Contact Information
The device is available as the standard products listed in the table below.
On request, all devices can be factory set to enable a 100k
Ω pull-down resistor for the EN pin.
Figure 30:
Ordering Information
Ordering Code Package
AS1345A-BWLT-AD 8-balls WL-CSP
Marking
I
LIMIT
Output
BK 100mA Adj.
Delivery
Form
Delivery
Quantity
Tape & Reel 1000 pcs/reel
AS1345A-BWLT-12 8-balls WL-CSP BS 100mA 1.2V
Tape & Reel 1000 pcs/reel
AS1345A-BWLT-15 8-balls WL-CSP
AS1345A-BWLT-17 8-balls WL-CSP
AS1345B-BWLT-AD 8-balls WL-CSP
AS1345D-BWLT-AD 8-balls WL-CSP
AS1345D-BWLT-15 8-balls WL-CSP
AS1345D-BWLT-17 8-balls WL-CSP
AS1345A-BTDT-AD
AS1345B-BTDT-AD
AS1345C-BTDT-AD
AS1345D-BTDT-AD
8-pin TDFN
8-pin TDFN
8-pin TDFN
8-pin TDFN
BI
BJ
BG
BH
CA
CI
CB
BN
CD
CL
1.5V
1.7V
Adj.
Adj.
1.5V
1.7V
Adj.
Adj.
Adj.
Adj.
100mA
100mA
200mA
500mA
500mA
500mA
100mA
200mA
350mA
500mA
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Tape & Reel 1000 pcs/reel
Buy our products or get free samples online at: www.ams.com/ICdirect
Technical Support is available at: www.ams.com/Technical-Support
Provide feedback about this document at: www.ams.com/Document-Feedback
For further information and requests, e-mail us at: [email protected]
For sales offices, distributors and representatives, please visit: www.ams.com/contact
ams Datasheet
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Headquarters
ams AG
Tobelbader Strasse 30
8141 Premstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
AS1345 −
Ordering & Contac t Information
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ams Datasheet
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AS1345 −
RoHS Compliant & ams Green Statement
RoHS Compliant & ams Green
Statement
RoHS:
The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br):
ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous material).
Important Information:
The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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Copyrights & Disclaimer
AS1345 −
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten,
Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.
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AS1345 −
Document Status
Document Status
Document Status
Product Preview
Preliminary Datasheet
Datasheet
Datasheet (discontinued)
Product Status
Pre-Development
Pre-Production
Production
Discontinued
Definition
Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice
Information in this datasheet is based on products in the design, validation or qualification phase of development.
The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice
Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of
Trade
Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and should not be used for new designs
ams Datasheet
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AS1345 −
Revision Information
Revision Information
Changes from 1-55 (2015-Apr-29) to current revision 1-56 (2016-Dec-28)
Updated Figure 30
Note(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
Page
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ams Datasheet
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AS1345 −
Content Guide
Content Guide
1 General Description
2 Key Benefits & Features
2 Applications
3 Block Diagram
4 Pin Assignment
6 Absolute Maximum Ratings
7 Electrical Characteristics
9 Typical Operating Characteristics
14 Detailed Description
14 Modes of Operation
15 Shutdown
15 Start-up and Inrush Limiting
15 Adjustable Output Voltage
18 Power OK Operation
18 Thermal Shutdown
19 Inductor Selection
20 Capacitor Selection
21 Schottky Diode Selection
22 PCB Layout
23 Package Drawings & Markings
25 Ordering & Contact Information
27 RoHS Compliant & ams Green Statement
28 Copyrights & Disclaimer
29 Document Status
30 Revision Information
ams Datasheet
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رابط عام للمستند
إعلان