The device is protected from overcurrent conditions with cycle-by-cycle current limiting on both the high-side and the low-side MOSFETs.

The device turns off the high-side MOSFET and discharges the COMP capacitor when the drain current exceeds 4.8-A typical. The low-side switch is turned on to discharge the inductor current and output capacitor.

When the low-side switch is turned on, the switch current is also sensed and monitored. The device turns off both high-side and low-side MOSFETs and discharges the COMP capacitor when the drain current (from drain to PGND) exceeds 3.2-A typical.

The device employs hiccup mode overcurrent protection. In hiccup mode, the device shuts itself down and attempts to start after T_OC. Hiccup mode helps reduce the device power dissipation under severe overcurrent conditions.