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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 109

A simple high efficiency, step-down switching regulator

San-Hwa Chee

Abstract

The LTC1174, which requires only four external components to construct a complete high efficiency step-down regulator, is described.

Keywords

Step-down switching regulator

LTC1174

The new LTC1174 requires only four external components to construct a complete high efficiency step-down regulator. Using Burst Mode operation, efficiency of 90% is achievable at output currents as low as 10mA. The LTC1174 is protected against output shorts by an internal current limit which is pin selectable to either 340mA or 600mA. This current limit also sets the inductor’s peak current. This allows the user to optimize the converter’s efficiency depending upon the ...

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