The SC1480A is a single output, constant on-time synchronous-buck, pseudo fixed frequency, PWM controller intended for use in notebook computers and other battery operated portable devices. .eatures include high efficiency and fast dynamic response with no minimum on time, a reference input and a buffered RE.OUT pin capable of sourcing 3mA. The excellent transient response means that SC1480A based solutions will require less output capacitance than competing fixed frequency converters.