In order to prevent excessive heating and power consumption under sustained short circuit conditions, a hiccup mode is included. If an overcurrent condition is maintained, the LM53625/35-Q1 shuts off its output and waits for TW (approximately 6 ms), after which the LM53625/35-Q1 restarts operation beginning by activating soft start.
During hiccup mode operation the switch node of the LM53625/35-Q1 is high impedance after a short circuit or overcurrent persists for a short duration. Periodically, the LM53625/35-Q1 attempts to restart. If the short has been removed before one of these restart attempts, the LM53625/35-Q1 operates normally.