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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 316

Direct efficient DC/DC conversion of 100V inputs for telecom/automotive supplies

Greg Dittmer

Abstract

A direct efficient DC/DC conversion of 100V inputs for telecom/automotive supplies is described.

Keywords

Automotive power

switching regulator controller

LTC3810

Introduction

Automotive, telecom and industrial systems have harsh, unforgiving environments that demand robust electronic systems. In telecom systems the input rail can vary from 36V to 72V, with transients as high as 100V. In automotive systems the DC battery voltage may be 12V, 24V or 42V with load dump conditions causing transients up to 60V or more. The LTC3810 is a current mode synchronous switching regulator controller that can directly step down input ...

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