The LTC4222 Hot Swap™ controller allows two power paths to be safely inserted and removed from a live backplane. Using external N-channel pass transistors, board supply voltages and inrush currents are ramped up at an adjustable rate. An I2C interface and on-board ADC allows for monitoring of current, voltage and fault status for each channel. The device features adjustable, analog, foldback current limit circuits and a Soft-Start circuit that sets the dI/dt of the inrush currents. An I2C interface may configure the part to latch off or automatically restart after the LTC4222 detects a fault on either channel. The controller has additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a load card and power-up either automatically upon insertion or wait for an I2C command to turn on. Applications * Live Board Insertion * Electronic Circuit Breakers * Computers, Servers * Platform Management * Allows Safe Insertion Into a Live Backplane * 10-Bit ADC Monitors Currents and Voltages * I2C/SMBus Interface * Wide Operating Voltage Range: 2.9V to 29V * dI/dt Controlled Soft-Start * High Side Drive for External N-Channel MOSFETs * No External Gate Capacitors Required * Input Overvoltage/Undervoltage Protection * Optional Latchoff or Auto-Retry After Faults * Alert Host After Faults * Inrush Current Limit with Foldback * Available in 32-Pin (5mm × 5mm) QFN and 36-Pin SSOP Packages https://elecena.pl/product/754551/dual-hot-swap-controller-with-ic-compatible-monitoring 2008-11-07 https://elecena.pl/product/754551/dual-hot-swap-controller-with-ic-compatible-monitoring 2014-06-11 https://elecena.pl/product/754551/dual-hot-swap-controller-with-ic-compatible-monitoring 2025-01-18