The ADM1177 is an integrated hot-swap controller which offers digital current and voltage monitoring via an on-chip 12-bit ADC, communicated through an I2C interface. An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC and SENSE pins. The ADM1177 limits the current through this resistor by controlling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage (and hence the inrush current) is kept below a preset maximum. The ADM1177 protects the external FET by limiting the time that it spends with the maximum current running in it. This current limit period is set by the choice of capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events at times after the hot-swap event is complete. In the case of a short-circuit event the current in the sense resistor will exceed an overcurrent trip threshold, and the FET will be switched off immediately by pulling down the GATE pin.