DESCRIPTION
The LTC®4212 is a Hot SwapTM controller that allows a board to be safely inserted and removed from a live backplane. An internal high side switch driver controls the gate of an external N-channel MOSFET for supply voltages ranging from 2.5V to 16.5V. The LTC4212 provides soft-start and inrush current limiting during the start-up period. It features a power-up timeout circuit that disconnects the system supply when the onboard supplies do not enter into regulation within an adjustable timeout period.

FEATURES
■ Allows Safe Board Insertion and Removal
   from a Live Backplane
■ Controls Supply Voltages from 2.5V to 16.5V
■ Adjustable Soft-Start with Inrush Current
   Limiting
■ Fast Turn-Off Time
■ No External Gate Capacitor is Required
■ Power Good Input with Adjustable Timer and
   Glitch Filter
■ Power-Up Timeout Circuit Interfaces with External
   Supply Monitors
■ Dual Level Overcurrent Fault Protection
■ Automatic Retry or Latched Mode Operation
■ High Side Drive for an External N-Channel FET
■ MS10 Package

APPLICATIONS
■ Electronic Circuit Breaker
■ Hot Board Insertion and Removal
■ Self-Isolating Hot Swap Boards