The gate drive output turns the MOSFET on in normal steady state operation, while achieving highspeed turn-off during input power source fault conditions, that cause reverse current flow, with auto-reset once the fault clears. The MOSFET drain-to-source voltage is monitored to detect normal forward, excessive forward, light load and reverse current flow. The PI2001 provides an active low fault flag output to the system during excessive forward current, reverse current, light load, overvoltage, under-voltage and over-temperature fault conditions. There is an internal shunt regulator at the VC input for high voltage applications and the under-voltage and over-voltage thresholds are programmable via external resistor dividers.