Chapter 111

Low parts count DC/DC converter circuit with 3.3V and 5V outputs

Ron Vinsant

Abstract

A simple low cost dual output step-down converter circuit based on the LT1076 five terminal switching regulator is described.

Keywords

Dual output DC/DC converter

Switching regulator

LT1076

This design note describes a simple low cost dual output step-down converter circuit based on the LT1076 five terminal switching regulator.

Performance

Input voltages can range from 8V to 30V. The load range on the 5V is 0.05A to 0.5A while the 3.3V load range is 0.1A to 1A. The circuit is self-protecting under no load conditions; it will “burp” in the same fashion as many off-line flyback power supplies.

Output voltage regulation is excellent. Over ...

Get Analog Circuit Design Volume Three now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.