LP3925 Datasheet, PDF (7/51 Pages) Texas Instruments – High Performance Power Management Unit for Handset Applications

Pin Descriptions
Name
BATT
D-
D+
Pin #
C1, D1
E1
F1
DATA/VP*
G2
FB_B1
FB_B2
FB_B3
GND
GND_B1
GND_B2
GND_B3
GND_SINK
HF_PWR
INP1*
INP2*
IRQ_N
LDO_UPWR
LDO1
LDO10
LDO11
LDO12
LDO13
LDO2
LDO3
LDO4
LDO5
LDO6
LDO7
LDO8
LDO9
OE_N*
OSC_32KHZ*
PS_HOLD
H1
H3
H5
E5
H2
G4, H4
G6, H6
F7
D4
F5
F6
G5
B5
A5
G9
H9
J9
J7
A7
A8
B8
A9
C9
D9
C8
F9
E2
D3
H7
PWR_ON
B3
RCV*
E3
REF_OUT
H8
RSENSE*
F4
RSTIN_N
B7
RSTOUT_N
C6
SCL
F3
SDA
G3
Type
P
A
A
DI/O
A
A
A
G
G
G
G
G
DI
A
A
DO
A
A
A
A
A
A
A
A
A
A
A
A
A
A
DI
DO
DI
DI
DO
A
A
DI
DO
DI
DI/O
Description
Main battery connection.
USB Differential Data Line (-) Input/Output.
USB Differential Data Line (+) Input/Output.
Data input/output for 3 wire USB transceiver/ USB Interface Plus Input/Output for 5 wire
USB. If OE_N = HIGH, VP is a receiver output (+), If OE_N = LOW, VP is a driver input
(+).
Buck1 Feedback.
Buck2 Feedback.
Buck3 Feedback.
Ground
Power Ground for Buck1.
Power Ground for Buck2.
Power Ground for Buck3.
Ground of GPIO current sink.
Input for triggering startup. Power up sequence starts when this pin is set HIGH. Internal
500 kΩ pull-down resistor.
Comparator 1 input
Comparator 2 input
Interrupt output, active LOW.
Open Drain output, external pull up resistor is needed, typ. 10 kΩ.
Internal supply output, fixed to 1.8V. Can be loaded externally, max 30 mA.
LDO1 Output
LDO10 Output
LDO11 Output
LDO12 Output
LDO13 Output
LDO2 Output
LDO3 Output
LDO4 Output
LDO5 Output
LDO6 Output
LDO7 Output
LDO8 Output
LDO9 Output
USB Output Enable input. Active LOW enables the transceiver to transmit data onto the
bus. A HIGH input enables receive mode.
Buffered 32 kHz clock signal output.
Control input for Power Up/Power Down sequences of PMU. Internal 500 kΩ pull-down
resistor by EEPROM default. Can be configured as pull-up as well.
Power button input. Power up sequence starts when this pin is set HIGH. Internal 500
kΩ pull-down resistor.
Receive Data: Single ended output from USB differential data lines for 5 wire USB.
2.5V Reference output
Sense resistor input pin for charge/discharge current measurement
Reset button input, active low. Internal 500 kΩ pull-up resistor.
Reset output, active low. Pin stays LOW during power up sequence.
Serial interface clock input; requires external pullup, 1.5 kΩ typ.
Serial interface bi-directional data; requires external pullup, 1.5 kΩ typ.
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