參數(shù)資料
型號(hào)： LP3918TLX-L
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 電源管理
英文描述： Battery Charge Management and Regulator Unit
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25
封裝： 2.50 X 2.50 MM, MICRO, SMD-25
文件頁(yè)數(shù)： 23/30頁(yè)
文件大?。?/td> 1292K
代理商： LP3918TLX-L
LP3918 Pin Descriptions
Pin #
Name
Type
Description
A1
IMON
A
Charge current monitor output. This pin presents an analog voltage representation of the
input charging current. VIMON(mV) = (2.47 x ICHG)(mA).
A2
PS_HOLD
DI
Input for power control from external processor/controller.
A3
VSS
G
Digital Ground pin
A4
RESET_N
DO
Reset Output. Pin stays LOW during power up sequence. 60ms after LDO1 (CORE) is
stable this pin is asserted HIGH.
A5
ACOK_N
DO
AC Adapter indicator, LOW when 4.5V – 6.0V present at CHG_IN.
B1
CHG_IN
P
DC power input to charger block from wall or car power adapters.
B2
PWR_ON
DI
Power up sequence starts when this pin is set HIGH. Internal 500k
pull-down resistor.
B3
SCL
DI
Serial Interface Clock input. External pull up resistor is needed, typ 1.5k
B4
PON_N
DO
Active low signal is PWR_ON inverted
B5
LDO7
A
LDO7 Output (GP)
C1
BATT
P
Main battery connection. Used as a power connection for current delivery to the battery.
C2
HF_PWR
DI
Power up sequence starts when this pin is set HIGH. Internal 500k
pull-down resistor.
C3
SDA
DI/O
Serial Interface, Data Input/Output Open Drain output, external pull up resistor is needed,
typ 1.5k
.
C4
TX_EN
DI
Enable control for LDO6 (TX). HIGH = Enable, LOW = Disable.
C5
LDO6
A
LDO6 Output (TX)
D1
VIN1
P
Battery Input for LDO1 - 2
D2
TCXO_EN
DI
Enable control for LDO4 (TCXO). HIGH = Enable, LOW = Disable.
D3
GNDA
G
Analog Ground pin
D4
RX_EN
DI
Enable control for LDO5 (RX). HIGH = Enable, LOW = Disable.
D5
LDO5
A
LDO5 Output (RX)
E1
LDO1
A
LDO1 Output (CORE)
E2
LDO2
A
LDO2 Output (DIGI)
E3
LDO3
A
LDO3 Output (ANA)
E4
LDO4
A
LDO4 Output (TCXO)
E5
VIN2
P
Battery Input for LDO3 - 7
A: Analog.
D: Digital.
I: Input.
DI/O: Digital Input/Output.
G: Ground.
O: Output.
P: Power.
3
www.national.com
LP3918
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