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