Single Inductor Dual Output DC-DC Converter with Ripple Based Regulator

Abstract

This paper proposes single inductor dual output (SIDO) buck and boost converters with a ripple based regulator. The proposed SIDO converter need no clock signal nor saw-tooth generator but use a triangular signal generated from the PWM signal. In simulation results, static output voltage ripples for buck and boost converters are smaller than 5mVpp and their transient responses are less than 10mV at 0.5 A current step for a buck converter and at 0.2 A for a boost converter. Line regulations are 5mV at E=10士1 V for a buck converter and 15mV at E=3.5士0.5 V for a boost converter.