2022 International Conference on Solid State Devices and Materials

Presentation information

Oral Presentation

12: Advanced Circuits / Systems Interacting with Innovative Devices and Materials

[K-9] Advanced Device-based Circuits and Power Management Systems

Thu. Sep 29, 2022 1:30 PM - 3:15 PM 304 (3F)

Session Chair: Kousuke Miyaji (Shinshu Univ.), Kiichi Niitsu (Nagoya Univ.)

2:45 PM - 3:00 PM

[K-9-06] Fully Integrated Switched-Capacitor Buck Converter with Variable Ratio and Frequency Controllers for Ultra-Low Power LSI Systems

〇Ryo Matsuzuka1, Tetsuya Hirose1, Shuto Kanzaki2, Kaori Matsumoto1, Nobutaka Kuroki2, Masahiro Numa2, Daisuke Kanemoto1 (1. Osaka Univ. (Japan), 2. Kobe Univ. (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.K-9-06

This paper presents a switched-capacitor (SC) buck converter with a variable ratio and frequency controllers. The variable ratio controller monitors an input voltage and then changes the step-down ratio of the SC converter, enabling the converter to operate with a wide range of input voltage. The frequency controller changes a frequency in accordance with the load current for highly efficient power conversion. Measurements of a prototype chip demonstrated that our SC buck converter achieved a high efficiency of 84%.

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