May 2007

Rev. 3

1/14

14

ST763A series

3.3V Step down current mode PWM DC-DC converters

Features

0.2µA OFF MODE

Description

The ST763A is a step-down switching regulator. It

operates from 3.3V to 11V giving a fixed 3.3V

output voltage, delivering up to 500mA. The

mainly features are typical efficiency of 90%,

quiescent current of 0.6mA, and only 0.2µA in

shut-down.

The PWM current mode control provides precise

output regulation and very good transient

response. Output voltage accuracy is guaranteed

to be ±5% over line, load and temperature

variations. A minimum number of external

components is used and the fixed frequency

switching allows easy filtering of output ripple and

noise.

Other features of this device are cycle-by-cycle

current limiting, overcurrent limiting, under voltage

lockout and programmable soft-start protection.

A 22µH inductor works in most applications, so no

sophisticated design is necessary.

Package available is SO-8.

Typical application are in 5V to 3.3V converters,

cellular phones, portable instruments, hand-held

computers, and peripherals.

SO-8

www.st.com

Order code

Part number

Packaging

ST763AC

ST763ACDTR