SLVSDT3D January 2018 – December 2019 TPS25221
PRODUCTION DATA.
The FAULT open-drain output is asserted (active low) during an over-current or over-temperature condition. The TPS25221 asserts the FAULT signal until the fault condition is removed and the device resumes normal operation. The TPS25221 is designed to eliminate nuisance FAULT reporting by using an internal 8 ms deglitch delay when reporting a fault. This ensures that FAULT is not accidentally asserted due to normal transient conditions, such as starting into a heavy capacitive load. The deglitch circuitry delays asserting and de-asserting current limit induce FAULT reports. The FAULT signal is not deglitched when the MOSFET is disabled due to an over-temperature condition, but is deglitched after the device has cooled and begins to turn on. This unidirectional deglitch prevents FAULT oscillation during an over-temperature event.