LP3918 Datasheet, PDF (20/39 Pages) National Semiconductor (TI) – Battery Charge Management and Regulator Unit

LP3918
SNVS476D – AUGUST 2007 – REVISED MAY 2013
Functional Block Diagram
AC Adapter or
VBUS supply
4.5V to 6V
10 PF
V_BATT
+
10 PF
Battery
10 PF
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IMON
ACOK_N
LDO2
Linear Charger
LDO2
1.5k
1.5k
Thermal
Shutdown
UVLO
Voltage
Reference
320 ms
debounce
SDA
SCL
PON_N
PS_HOLD
RESET_N
HF_PWR
PWR_ON
V_BATT
O/D output
320 ms
debounce
30 ms
debounce
LDO2
Serial
Interface
and Control
LP3918
LDO1
LDO2
LDO3
LDO4
LDO5
LDO6
LDO7
LDO1
1 PF
CORE
1.8V
@300 mA
LDO2
1 PF
DIGI
3.0V
@300 mA
LDO3 ANA
3.0V
1 PF ^{@80 mA}
TCXO_EN
LDO4
1 PF
TCXO
3.0V
@80 mA
RX_EN
LDO5
1 PF
RX
3.0V
@150 mA
TX_EN
LDO6 _TX
3.0V
1 PF @150 mA
LDO7 _GP
3.0V
1 PF @150 mA
Figure 8. LP3918 Functional Block Diagram
20
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