LT4256-2IS8#TRPBF Description

The LT4256-2IS8#TRPBF is a high-voltage Hot SwapTM controller that allows a board to be safely inserted and removed from a live backplane. An internal driver drives an external N-channel MOSFET switch to control supply voltages ranging from 10.8V to 80V. The LT4256-2IS8#TRPBF features an adjustable analog foldback current limit. If the supply remains in the current limit for more than a programmable time, the N-channel MOSFET shuts off and the PWRGD output asserts low. The LT4256-2IS8#TRPBF automatically restarts after a time-out delay. The LT4256-2IS8#TRPBF latches off until the UV pin is cycled low.

LT4256-2IS8#TRPBF Features

Allows Safe Board Insertion and Removal from a Live Backplane

Controls Supply Voltage from 10.8V to 80V

Foldback Current Limiting

Overcurrent Fault Detection

Drives an External N-Channel MOSFET

Programmable Supply Voltage Power-Up Rate

Undervoltage Protection

Latch Off Operation Mode (LT4256-1)

Automatic Retry (LT4256-2)

Available in an 8-Pin SO Package

LT4256-2IS8#TRPBF Applications

Hot Board Insertion

Electronic Circuit Breaker/Power Bussing

Industrial High Side Switch/Circuit Breaker

24V/48V Industrial/Alarm Systems

Ideally Suited for 12V, 24V and 48V Distributed Power Systems

48V Telecom Systems