The LM25149 includes an internal hiccup-mode protection function. After an overload is detected, 512 cycles of cycle-by-cycle current limiting occurs. The 512-cycle counter is reset if four consecutive switching cycles occur without exceeding the current limit threshold. Once the 512-cycle counter has expired, the internal soft start is pulled low, the HO and LO driver outputs are disabled, and the 16384 counter is enabled. After the counter reaches 16384, the internal soft start is enabled and the output restarts. The hiccup-mode current limit is disabled during soft start until the FB voltage exceeds 0.4 V.