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SC2603A

Simple PWM Boost Converter

In Small SOT23-6 Package

POWER MANAGEMENT

Description

Features

Applications

The SC2603A is a versatile, low-cost, voltage-mode PWM

controller designed for DC/DC power supply applications.

A simple, fixed-voltage boost regulator can be implemented

using the SC2603A with a minimum of external compo-

nents. The small device footprint allows for compact circuit

design.

SC2603A features include a temperature compensated

voltage reference, triangle wave oscillator, current limit

comparator, frequency shift over-current protection, and

an internally compensated error amplifier. Pulse by pulse

current limiting is implemented by sensing the differential

voltage across an external resistor, or an appropriately

sized PC board trace.

The SC2603A operates at a fixed frequency of 200kHz,

providing an optimum compromise between efficiency,

external component size, and cost.

Typical Application Circuit

Revision: May 8, 2007

Figure : 2V to 25V/A Boost Conveter

C5

R1

VOUT

D2

Optional

L1

1

2

R2

VIN

U1

SC2603A

5

3

1

2

6

4

VIN

EN/SS

FB

GND

CS

GATE

Q1

R6

C4

R5

C3

D1

R4

Enable