Chapter 141

No design switching regulator 5V, 5A buck (step-down) regulator

Ron Vinsant

Abstract

This chapter describes a simple and low-cost step-down converter circuit to convert an 8V to 40V input to a regulated 5V output, using off-the-shelf parts.

Keywords

Step-down converter

switching regulator

buck regulator

Introduction

This simple, no design regulator, is a step-down DC/DC converter designed to convert an 8V to 40V input to a regulated 5V output. The 5V output is capable of sourcing up to 5A of output current.

This converter is based on the Linear Technology LT1074 switching regulator IC. This device needs only a few external parts to make up a complete regulator including thermal protection and current limit. This design ...

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