Chang M.-CWu M.-HSHEN-IUAN LIU2021-09-022021-09-022020https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093648107&doi=10.1109%2fVLSI-DAT49148.2020.9196387&partnerID=40&md5=621e687b6bc83b5033c68fd8a168d1d5https://scholars.lib.ntu.edu.tw/handle/123456789/581137A 500nW-50 \mu \mathrm{W} indoor photovoltaic energy harvester is presented with a multi-mode maximum power point tracking (MPPT) circuit. Three switched-capacitor DC-DC converters (SCDCs) with different switch sizes and flying capacitors are realized. A multi-mode MPPT circuit is presented to tune the voltage conversion ratios and the switching frequency of the SCDCs. In addition, this multi-mode MPPT circuit also utilizes three reconfigurable SCDCs to cover the input power range of 500nW \sim 50 \mu \mathrm{W}. This indoor photovoltaic energy harvester is realized in a 0.18m CMOS process and its active area is 1.15mm2. The measured peak power conversion efficiency is 64.4%. ? 2020 IEEE.Conversion efficiency; Energy harvesting; Maximum power point trackers; Switching frequency; VLSI circuits; Flying capacitor; Input power; Maximum Power Point Tracking; Photovoltaic energy; Reconfigurable; Switch size; Switched-capacitor dc-dc converter; Voltage conversion ratio; DC-DC converters[SDGs]SDG7Conversion efficiency; Energy harvesting; Maximum power point trackers; Switching frequency; VLSI circuits; Flying capacitor; Input power; Maximum Power Point Tracking; Photovoltaic energy; Reconfigurable; Switch size; Switched-capacitor dc-dc converter; Voltage conversion ratio; DC-DC convertersconference paper10.1109/VLSI-DAT49148.2020.91963872-s2.0-85093648107