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SC2672

Dual Synchronous

Voltage Mode Controller

POWER MANAGEMENT

Description

Features

Applications

Revision: July 15, 2004

The SC2672 is a versatile 2 phase, synchronous, volt-

age mode PWM controller that may be used in two dis-

tinct ways. The SC2672 is ideal for dual voltage inde-

pendent applications. The SC2672 features a tempera-

ture compensated voltage reference, an undervoltage

lockout over current protection and internal level-shifted,

high-side drive circuitry.

In dual switcher configuration, two feedback paths are

provided for independent control of the separate out-

puts. The device will provide a regulated output from

flexibly configured inputs (3.3V, 5V, 12V), provided 5V is

present for V

to minimize input and output ripple.

300kHz operating frequency

Soft Start

Power Good output provided

Undervoltage current limit

Phase-shifted switchers minimize ripple

High efficiency operation, >90%

Programmable output(s) as low as .9V

Industrial temperature range

SOIC-16 pin package

Bias voltage as low as 4.5V

Two Independent PWM Controllers

Flexible, same or separate V

IN

Independent control for each channel

Independent and separate output UVLO

2 phases operating opposed for ripple reduction

(if same V

Graphics cards

Peripheral add-in card

Power supplies requiring two outputs

Typical Application Schematic