Foldback protection modes are entered when the duty cycle exceeds the minimum on- and off-times of the device. At very high duty cycles, where the minimum off-time is not satisfied, the frequency folds back to allow more time for the peak current command to be reached. The maximum on-time is 8 µs, which limits the maximum duty cycle in dropout to 98%. At very low duty cycles when the minimum on-time is reached, the device maintains regulation by dropping the frequency to allow more time for the inductor current to discharge the output capacitor. Foldback mode is exited once the minimum on-time and off-times are satisfied.