DEVICE INFORMATION

Charge

Pump

Driver

UVLO

Current

Limit

Thermal

Sense

IN

GND

EN

ILIM

OUT

FAULT

CS

Reverse

Voltage

Comparator

-

+

Current

Sense

8-msDeglitch

PARAMETER MEASUREMENT INFORMATION

OUT

90%

90%

10%

10%

VOLTAGEWAVEFORMS

TESTCIRCUIT

50%

50%

90%

10%

V

OUT

V

OUT

V

EN

TPS2551-Q1

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

EN

3

I

Enable input, logic high turns on power switch

FAULT

4

O

Active-low open-drain output, asserted during overcurrent, overtemperature, or reverse-voltage conditions.

GND

2

Ground connection

ILIM

5

I

External resistor used to set current-limit threshold; recommended 14.3 k

IN

1

I

Input voltage; connect a 0.1

µF or greater ceramic capacitor from IN to GND as close to the IC as possible.

OUT

6

O

Power-switch output

FUNCTIONAL BLOCK DIAGRAM

Figure 2. Test Circuit and Voltage Waveforms

Copyright © 2008, Texas Instruments Incorporated

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Product Folder Link(s): TPS2551-Q1