The LM51772 features a short circuit protection or over current protection. This protection uses cycle-by-cycle peak current sensor connected to the CSA and CSB-pin. There are two modes for this protection. In hiccup mode, the controller stops the converter operation after detecting cycle-by-cycle peak current longer as the hiccup mode on-time. The converter logic initiates a discharge of the soft-start capacitor and the output stays off until the hiccup mode off-time elapses. Then the logic will exit the hiccup mode and re-start the output with a normal soft-start sequence where the soft-start capacitor is charged with the internal current source. If the short or overload condition persist the hiccup timer starts again after the soft-ramp finishes. If hiccup mode protection is not enabled, the device will operate in cycle-by-cycle current limiting as long as the overload condition persists. The peak inductor current limit in steady state is calculated as shown in Equation 14