All the devices in the family have a cycle-by-cycle current limit function. When the device detects that the current in the high-side FET exceeds the high-side current limit, either due to a heavy load or a short-circuit condition, the device immediately turns off the high-side FET and turns on the low-side FET. The high-side FET turns on again at the start of the next switching cycle. Note that because of the propagation delay in the current limit comparator (typically 60 ns), the current flowing in the high-side FET when the device detects a current limit condition can be slightly higher than the current limit specified in the device Electrical Characteristics.

Devices with an 'A' and 'K' suffix in their part number respond to repeated current limit events with hiccup behavior (see Device Options).

Devices with a 'B' suffix in their part number respond to repeated current limit events with latch-up behavior (see Device Options).