Title :
A 0.5V start-up 87% efficiency 0.75mm2 on-chip feed-forward single-inductor dual-output (SIDO) boost DC-DC converter for battery and solar cell operation sensor network micro-computer integration
Author :
Nakase, Yasunobu ; Hirose, Shinichi ; Onoda, Hiroshi ; Ido, Yasuhiro ; Shimizu, Yoshiaki ; Oishi, Tsukasa ; Kumamoto, Toshio ; Shimizu, Toru
Author_Institution :
Renesas Electron. Corp., Itami, Japan
Abstract :
An on-chip low power single-inductor dual-output DC-DC converter is proposed for battery and solar cell operating sensor network applications. By a new feed-forward control, a test chip fabricated by 190nm CMOS achieves a high efficiency of 87% at the practical load condition with a small area size of 0.75mm2 without any compensation capacitor. In addition, the fluctuation of the output voltage remains within 100mV when the input voltage changes from 1V to 2V. For a solar cell operation, 0.5V start-up is achieved with a process technology of flash-memory embedded micro-computers by utilizing forward back bias. A super capacitor is charged up to 5V from a solar cell with an implemented MPPT.
Keywords :
CMOS integrated circuits; DC-DC power convertors; cells (electric); feedforward; flash memories; inductors; maximum power point trackers; microcomputers; solar cells; supercapacitors; wireless sensor networks; CMOS process; MPPT; SIDO boost DC-DC converter; battery; compensation capacitor; efficiency 87 percent; feedforward control; flash-memory embedded microcomputers; forward back bias; on-chip feedforward single-inductor dual-output boost DC-DC converter; size 190 nm; solar cell operation sensor network microcomputer integration; supercapacitor; voltage 0.5 V; voltage 100 mV; Batteries; Capacitors; Clocks; Logic gates; Microcomputers; Photovoltaic cells;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2012 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1555-5
Electronic_ISBN :
0886-5930
DOI :
10.1109/CICC.2012.6330632
