APPLICATION NOTE 6498

Explaining Valley Current Protection for MAX20730, MAX20733, MAX20734, MAX20735, MAX20743, and MAX20745

By: Don Corey

Abstract: The MAX20730, MAX20734, and MAX20743 switching regulators with PMBus operate from 4.5V to 16V and require up to 35A. When using switching regulators for 12V bus systems, overcurrent protection (OCP) is important. This application note explains how to use Maxim’s implemented valley current-mode algorithm to set the OCP values. This application note also applies to the MAX20733, MAX20735, and MAX20745 devices without the PMBus interface.