Analog Circuit Design Volume Three

Chapter 279

Multiple power supplies track during power-up

Vladimir Ostrerov

Abstract

A five supply voltage tracker circuit is described. The key components are the LTC1728-1.8 triple supply monitor and the LTC1422 single Hot Swap controller.

Keywords

Multiple power supplies

LTC1728-1.8 triple supply monitor

LTC1422 single Hot Swap controller

Introduction

Many modern circuits require multiple power supplies that must turn on in a certain order to avoid damaging sensitive components. In many cases, forcing the supplies to ramp up together is the preferred solution. Unfortunately, this can be difficult when the supplies are generated from multiple sources, each with its own power-up timing and transient response. However, there is a ...