LP3925 Datasheet, PDF (8/51 Pages) Texas Instruments – High Performance Power Management Unit for Handset Applications

Name
Pin #
SEO/M*
F2
SEL
D5
SIM_CLK*
D7
SIM_CLK_IN*
E7
SIM_DATA*
E8
SIM_IO*
D8
SIM_RST*
D6
SIM_RST_IN*
E6
SINK1*
G8
SINK2*
F8
SINK3*
G7
SLEEP_N
(TCXO_EN)
C7
SPND*
E4
SW_B1
SW_B2
SW_B3
TCXO1_I*
TCXO1_O*
TCXO2_I*
TCXO2_O*
USB_GND
VCOIN
VDD
VIN_B1
VIN_B2
VIN_B3
VIN_CHG
VIN1
VIN2
VIN3
VIN4
VTRM
XIN
XOUT
J2
J4
J6
B6
C3
C5
C4
G1
B4
A1, B1
J1
J3
J5
A2, B2, C2
A6
B9
E9
J8
D2
A3
A4
Type
DI/O
DI
DO
DI
D
D
DO
DI
A
A
A
DI
DI
A
A
A
A
DO
A
DO
G
A
P
P
P
P
P
P
P
P
P
A
A
A
Description
Data input/output for 3 wire USB transceiver/ USB Interface Minus Input/Output for 5 wire
USB. If OE_N = HIGH, VM is a receiver output (-), If OE_N = LOW, VM is a driver input
(-).
Select input for default option at power up
SIM card connection. Level shifted clock signal to SIM
SIM clock input from Baseband Processor
SIM data input/output from Baseband Processor
SIM card connection. SIM Card Data input/output
SIM card connection. Level shifted reset signal to SIM
SIM reset input from Baseband Processor
Current sink input 3.
Current sink input 2.
Current sink input 3.
Sleep mode input, active low. Internal 500 kΩ pull-up resistor by EEPROM default. Can
be configured as pull-down as well.
USB Suspend mode control input for 5 wire USB. A logical high at SUSPEND will power
down the differential receiver and VP and VM will remain active with reduced current
consumption.
Buck1 Output.
Buck2 Output.
Buck3 Output.
TCXO1 buffer input.
Buffered and validated TCXO1 output clock signal.
TCXO2 buffer input.
Buffered and validated TCXO2 output clock signal.
USB Ground
Back up battery Charger Output. Connection of external coin cell (2.5 or 3.0V).
Output for system power.
Input for Buck1
Input for Buck2
Input for Buck3
DC power input to charger block from wall, car power adapter or USB. Requires 1µF
capacitor to ground.
Input for LDOs
Input for LDOs
Input for LDOs
Input for LDOs
USB Reference supply output (3.3 V). Requires 1µF capacitor to GND for stability. LDO14
External Crystal Oscillator In
External Crystal Oscillator Out
*Pins that can be programmed as analog pins (default as stated in pin configuration) or digital input/output pins. Pins that are used for USB transceiver interfacing
are chosen in accordance of the interface used, either 3–wire or 5–wire. All these pins except SINK1, 2, 3 and INP1, 2 can be used as ADC inputs.
A:
D:
I:
DI/O
G:
O:
P:
Analog Pin
Digital Pin
Input Pin
Digital Input/Output Pin
Ground
Output Pin
Power Connection
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