H³Reg™ control is an advanced version of fixed on-time control and ROHM's unique control method. If the load current increases rapidly, the output voltage drops, and the feedback voltage does not rise above the reference voltage after the specified on-time, extend the on-time of the high-side switch to provide more power. to hasten the recovery of the output voltage. This provides faster transient response characteristics than fixed on-time control, and reduces the number of switching times during sudden load changes, reducing noise generation.