Chapter 105

Highly integrated high efficiency DC/DC conversion

San-Hwa Chee and Howard Haensel

Abstract

The LTC1574 and LTC1265, high efficiency step-down regulators that minimize external components by using integrated low RDS(ON) P-channel switches, are described.

Keywords

Switching regulator

LTC1574

LTC1265

The LTC1574 and LTC1265 high efficiency step-down regulators minimize external components by using integrated low RDS(ON) P-channel switches. The LTC1574 goes one step further by including a low forward drop Schottky diode—an industry first. Both regulators also include on-chip low-battery detectors.

Burst Mode operation allows the LTC1574 and LTC1265 to achieve over 90% efficiency for load currents as low as 10mA. Current mode ...

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