TPS2140IPWPR datasheet(3/33 Pages) TI1

3 / 33 page

TPS2140, TPS2141

TPS2150, TPS2151

SLVS399A − JANUARY 2002 − REVISED MAY 2006

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functional block diagram

2-Level

Current

Limit

Driver

SW_OUT

VREF

VCC

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

Feedback adjustment of LDO regulator to set output voltage

GND

Ground

LDO_EN

Enable signal for LDO regulator, active high, no internal pullup or pulldown

LDO_IN

Input of LDO regulator

LDO_OUT

Output of LDO regulator

LDO_PG

Power good signal for LDO output, open-drain, active high

LDO_PLDN

Output pulldown pin used for LDO when connected to LDO_OUT

SW_EN or

SW_EN

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

Input of the switch

SW_OUT

12, 13

Output of switch

SW_PG

Power good signal for switch output, active high logic-level signal, no external pullup required.

SW_PLDN

Output pulldown pin used for switch when connected to SW_OUT.

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