The FAULT open-drain output is asserted (active low) during an overcurrent, overtemperature or overvoltage condition. The TPS25200 asserts the FAULT signal until the fault condition is removed and the device resumes normal operation. The TPS25200 is designed to eliminate false FAULT reporting by using an internal delay "deglitch" circuit for overcurrent (8-ms typical) conditions without the need for external circuitry. This ensures that FAULT is not accidentally asserted due to normal operation such as starting into a heavy capacitive load. The deglitch circuitry delays entering and leaving current-limit induced fault conditions.

The FAULT signal is not deglitched when the MOSFET is disabled due to an overtemperature condition but is deglitched after the device has cooled and begins to turnon. This unidirectional deglitch prevents FAULT oscillation during an overtemperature event.

The FAULT signal is not deglitched when the MOSFET is disabled into OVLO or out of OVLO. The TPS25200 does not assert the FAULT during output voltage clamp mode.

Connect FAULT with a pull up resistor to a low voltage I/O rail.