A 0.3V–1.2V ultra-low input voltage, reconfigurable switched-capacitor DC-DC converter for energy harvesting system

Abstract

A fully integrated, reconfigurable step-up DC-DC switched-capacitor power supply solution for energy harvesting system is presented in this paper. A new series-parallel architecture of step-up switched-capacitor converter with Pulse Skip Modulation (PSM) is proposed. This converter generates a stable regulated output (1.2V) from an ultra-low input voltage of 0.3V-1.2V. The designed converter achieves a 76% simulated efficiency @520mV and 30μA load current and operates down to 300mV(44% simulated efficiency@1μA).