© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

400mA/200mA Dual 3.3V Smart

Power Switch

SC1543

PRELIMINARY - October 9, 2000

4

PIN CONFIGURATION

(MSOP-8)

Top View

BLOCK DIAGRAM

PIN DESCRIPTION

Pin

Pin Name

Pin Function

1,2

VIN1

Primary input supply, nominally 3.3V.

3,4

VIN2

Secondary input supply, nominally 3.3V.

5

GND

Power and logic ground.

6,7

VOUT

3.3V out.

8

SHDN

Shutdown, with internal pull-down. Device is OFF when this pin is High. Leave open if shut-

down feature is not required.