© 1997 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

LOW VOLTAGE MULTI-MODE

DC-DC CONVERTER

SC1630

January 30, 1998

Note:

(1) Add suffix ‘TR’ for tape and reel.

FEATURES

DESCRIPTION

The SC1630 is a DC-DC converter designed to drive

an external power switch for more flexibility, especially

in higher voltage and larger power applications.

Typically six components are required to set up a

step-up configuration easily achieving an efficiency

beyond 80%. A few more components are required to

set up a step down configuration delivering 4A load

current with 83% typical efficiency, 86% at 2A load,

and 300µA quiescent current.

The output voltage can be internally set to 5V or

externally set to an arbitrary value below breakdown

voltage of the power switch. Logic-controlled

shutdown mode is provided for power-saving. The low

battery detector can also be configured as a linear

regulator.

A 120kHz switching rate reduces the inductor size.

Inductors of 25µH to 50µH inductance are

recommended for most applications.

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

BLOCK DIAGRAM

APPLICATIONS

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Maximum

Units

Supply Voltage

V

IN

7.0

V

Operating

Temperature Range

T

A

0 to 70

°C

Storage Temperature

Range

T

STG

-65 to 125

°C

PIN CONFIGURATION

DEVICE

(1)

PACKAGE

SC1630CS

SO-8

ORDERING INFORMATION