Abstract
A single-inductor dual-output (SIDO) step-down DC-DC converter with continuous conduction mode (CCM) operation is proposed to improve efficiency and reduce cost for power management applications. The variable frequency of pulse width modulation (PWM) technique is employed to reduce cross regulation between dual outputs. Through adjusting frequency according to loads, the power and the its margin can be increased. The proposed SIDO converter has been demonstrated with 0.35um CMOS process for a system-on-chip (SoC) design. Besides, the specification of the converter is designed under voltage supply from 2.7V to 3.3V and dual outputs at 1.8V/1.2V.