General Description

The MAX4370 is a circuit-breaker IC designed to offer protection in hot-swap applications using Maxim’s

DualSpeed/BiLevel™ detection. This controller, designed to reside either on the backplane or on the

removable card, is used to protect a system from startup damage when a card or board is inserted into a rack

with the main system power supply turned on. The card’s discharged filter capacitors provide a low impedance that can momentarily cause the main power supply to collapse.

Features

♦DualSpeed/BiLevel Protection During Normal Operation

♦Inrush Current Regulated at Start-Up

♦Resides Either on the Backplane or on the Removable Card

♦Programmable Start-Up Period and Response Time

♦Allows Safe Board Insertion and Removal from Live Backplane

♦Protection for +3V to +12V Single Supplies

♦Latched Off After Fault Condition

♦Status Output Pin

♦Internal Charge Pump Generates Gate Drive for External N-Channel MOSFET

Applications

Hot Board Insertion

Solid-State Circuit Breaker