■ Allows Safe Board Insertion and Removalfrom a Live Backplane
■ Adjustable Analog Current Limitwith Circuit Breaker
■ Fast Response Limits Peak Fault Current
■ Automatic Retry or Latch Off On Current Fault
■ Adjustable Supply Voltage Power-Up Rate
■ High Side Drive for External MOSFET Switch
■ Controls Supply Voltages from 2.7V to 16.5V
■ Undervoltage Lockout
■ Adjustable Overvoltage Protection
■ Low Profile (1mm) SOT-23 (ThinSOTTM) Package
■ Hot Board Insertion
■ Electronic Circuit Breaker
■ Industrial High Side Switch/Circuit Breaker
The LTC®4210 is a 6-pin SOT-23 Hot SwapTM controllerthat allows a board to be safely inserted and removed froma live backplane. An internal high side switch drivercontrols the GATE of an external N-channel MOSFET for asupply voltage ranging from 2.7V to 16.5V.
The LTC4210provides the initial timing cycle and allows the GATE to beramped up at an adjustable rate.The LTC4210 features a fast current limit loop providingactive current limiting together with a circuit breakertimer.
The signal at the ON pin turns the part on and off andis also used for the reset function.This part is available in two options: the LTC4210-1 forautomatic retry on overcurrent fault and the LTC4210-2for latch off on an overcurrent fault.
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