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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 162

No design switching regulator 5V buck-boost (positive-to-negative) regulator

Ron Vinsant

Abstract

A no design switching regulator 5V buck-boost (positive-to-negative) regulator is described.

Keywords

Switching regulator

LT1074

Introduction

This simple, no design regulator, operates with an input between 4.5V DC and 40V DC. It provides a −5V output at a maximum output current of 1A to 3A depending on input voltage.

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 uses off-the-shelf parts for low cost and easy availability of components. Specifications for ...

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