Datasheet

 
 
SLVS399A − JANUARY 2002 − REVISED MAY 2006
3
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functional block diagram
CS
2-Level
Current
Limit
Driver
SW_OUT
VREF
VREF
V
CC
Select
Charge
Pump
Thermal
Sense
0.9 V to 3.3 V
250 mA
LDO
SW_IN
LDO_IN
SW_EN
†
LDO_EN
GND
SW_OUT
SW_PG
SW_PLDN
LDO_PG
ADJ
LDO_OUT
LDO_PLDN
†
The pin is active low for TPS2140 and TPS2141, with an internal pullup.
The pin is active high for TPS2150 and TPS2151, with an internal pulldown.
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME NO.
I/O
DESCRIPTION
ADJ 9 I Feedback adjustment of LDO regulator to set output voltage
GND 7 Ground
LDO_EN 6 I Enable signal for LDO regulator, active high, no internal pullup or pulldown
LDO_IN 4 I Input of LDO regulator
LDO_OUT 11 O Output of LDO regulator
LDO_PG 8 O Power good signal for LDO output, open-drain, active high
LDO_PLDN 10 I Output pulldown pin used for LDO when connected to LDO_OUT
SW_EN or
SW_EN
5 I Active-high enable for switch on TPS2150 and TPS2151 devices with internal pulldown
Active-low enable for switch on TPS2140 and TPS2141 devices with internal pullup
SW_IN 2, 3 I Input of the switch
SW_OUT 12, 13 O Output of switch
SW_PG 1 O Power good signal for switch output, active high logic-level signal, no external pullup required.
SW_PLDN 14 I Output pulldown pin used for switch when connected to SW_OUT.