POWER MANAGEMENT

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SC2618

Miniature PWM Controller

for Buck Regulator

Features

Applications

Revision: September 19, 2005

Typical Application Circuit

Description

The SC2618 is a hysteretic mode PWM controller de-

signed for high efficiency, low cost “Point of Load” appli-

cations.

The hysteretic control scheme allows the use of ceramic

output capacitors without the need for compensation

components and difficult calculations.

An internal soft start prevents output voltage from start

up overshoot. A “Hiccup” short circuit protection provides

protection against output short circuits as well as ad-

verse input supply sequencing.

Operating Frequency up to 500kHz

Input supply from 5V to 12V

0.5A gate drive capability

Internal soft start

Hiccup mode short circuit protection

Input supply sequence protection

6 lead SOT23 package

GND

VCC

BOOST

VIN

Q2

GND

VO

Q1

SC2618

2

3

1

5

6

4

GND

VCC

DL

BST

DH

FB

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Embedded, low cost, high efficiency converters