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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 36

Bootstrap biasing of high input voltage step-down controller increases converter efficiency

Goran Perica and Victor Khasiev

Abstract

The high voltage buck DC/DC controllers LTC3890 (dual output) and LTC3891 (single output), which are popular in automotive applications due to their extremely wide 4V to 60V input voltage range, are described.

Keywords

Buck DC/DC controller

LTC3890

LTC3891

Introduction

High voltage buck DC/DC controllers such as the LTC3890 (dual output) and LTC3891 (single output) are popular in automotive applications due to their extremely wide 4V to 60V input voltage range, eliminating the need for a snubber and voltage suppression circuitry. These controllers are also well suited for 48V telecom applications ...

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