Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process

Choi, Minho; Jeong, Deog-Kyoon

doi:10.3390/electronics9020372

Open AccessArticle

Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process

by

Minho Choi

^1,2 and

Deog-Kyoon Jeong

^1,*

¹

Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Korea

²

System LSI Business, Samsung Electronics, Hwaseong 18848, Korea

^*

Author to whom correspondence should be addressed.

Electronics 2020, 9(2), 372; https://doi.org/10.3390/electronics9020372

Submission received: 30 January 2020 / Revised: 19 February 2020 / Accepted: 19 February 2020 / Published: 21 February 2020

(This article belongs to the Section Circuit and Signal Processing)

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Abstract

A soft-switching hybrid DC-DC converter with a 2-phase switched capacitor is proposed for the implementation of a fully-integrated voltage regulator in a 65 nm standard CMOS process. The soft-switching operation is implemented to minimize power loss due to the parasitic capacitance of the flying capacitor. The 2-phase switched capacitor topology keeps the same resonance value for every soft-switching operation, resulting in minimizing the voltage imbalance of the flying capacitor. The proposed adaptive timing generator digitally calibrates the turn-on delay of switches to achieve a complete soft-switching operation. The simulation results show that the proposed soft-switching hybrid DC-DC converter with a 2-phase 2:1 switched capacitor improves the efficiency by 5.1% and achieves 79.5% peak efficiency at a maximum load current of 250 mA.

Keywords: DC-DC converter; soft switching; switched capacitor; hybrid converter; fully-integrated voltage regulator

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MDPI and ACS Style

Choi, M.; Jeong, D.-K. Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process. Electronics 2020, 9, 372. https://doi.org/10.3390/electronics9020372

AMA Style

Choi M, Jeong D-K. Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process. Electronics. 2020; 9(2):372. https://doi.org/10.3390/electronics9020372

Chicago/Turabian Style

Choi, Minho, and Deog-Kyoon Jeong. 2020. "Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process" Electronics 9, no. 2: 372. https://doi.org/10.3390/electronics9020372

APA Style

Choi, M., & Jeong, D.-K. (2020). Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process. Electronics, 9(2), 372. https://doi.org/10.3390/electronics9020372

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process

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