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
