- 著者
-
Kojima Yuta
Hirose Tetsuya
Tsubaki Keishi
Ozaki Toshihiro
Asano Hiroki
Kuroki Nobutaka
Numa Masahiro
- 出版者
- Institute of Physics
- 雑誌
- Jpn. J. Appl. Phys. (ISSN:00214922)
- 巻号頁・発行日
- vol.55, no.4, 2016-03-16
- 被引用文献数
-
9
In this paper, we present a fully on-chip switched-capacitor DC–DC converter for low-voltage CMOS LSIs. The converter has three terminals of input, ground, and output, by developing control circuits with fully on-chip configuration. We employ an ultra low-power nanoampere bias current and voltage reference circuit to achieve ultra low-power dissipation of control circuits. It enables us to realize a highly efficient power conversion circuit at light-load-current applications. The converter achieves highly efficient and robust voltage conversion using a pulse frequency modulation control circuit and a start-up/fail-safe circuit. Measurement results demonstrated that the converter can convert a 3.0 V input into 1.2 V output successfully. The start-up and fail-safe operations were confirmed through the measurement. The efficiency was more than 50% in the range of 2–6 µA load current.