Abstract: A circuit for detecting failure of a device includes an on-phase detector, an off-phase detector, and protection switch circuitry. The on-phase detector is configured to determine whether a first failure has occurred at the device based on a rate of change of a current at a high-side switching element. The off-phase detector is configured to determine whether a second failure has occurred at the device based on both a current at a low-side switching element and a voltage at a switch node that is electrically coupled to the high-side switching element and the low-side switch. The protection switch circuitry is configured to electrically disconnect the high-side switching element from a supply circuit in response to the on-phase detector determining that the first failure has occurred at the device or in response to the off-phase detector determining that the second failure has occurred at the device.