Document
LT4256-1/LT4256-2
Positive High Voltage Hot Swap Controllers
U U
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
U APPLICATIO S
■ 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
DESCRIPTIO
The LT®4256-1/LT4256-2 are high voltage Hot SwapTM controllers that allow 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.
T.