Minimum on-time specification determines the maximum operating frequency of the design. During soft-start, if the required duty cycle is less than the minimum controllable on-time, the device can enter into a pulse-skipping mode. Thus, instantaneous output pulses can be higher or lower than the desired voltage. This behavior is only evident when operating at high frequency with high bandwidth. When the minimum on-pulse is greater than the minimum controllable on-time, the turn-on behavior is normal.