The LTC4231HUD-1#PBF is a high voltage micropower hot swap controller in 12 pin QFN package. It allows safe circuit board insertion and removal from live power supply. An internal high side switch driver controls gate of an external N channel MOSFET. The back to back MOSFETs can be used for reverse supply protection down to -40V. The LTC4231-1 provides debounce delay and allows GATE to be ramped up at an adjustable rate. After start-up, the quiescent current drops to 4μA during normal operation with output active. The UVL, UVH, OV and GNDSW pins monitor overvoltage and undervoltage periodically by keeping total quiescent current low. Pulling SHDN low shuts down the LTC4231-1 and quiescent current drops to 0.3μA. The device remains off after current fault.
Supply current of 4μA
Shutdown current of 0.3μA
Wide operating voltage range from 2.7V to 36V
Adjustable analogue current limit with circuit breaker
Automatic retry or latch-off on current fault
Controls single or back to back N channel MOSFETs
Operating ambient temperature range from -40°C to 125°C
(EN)
