A Fully-Integrated Flexible Dual-Ring Switched-Capacitor DC-DC Converter With Fractional VCRs and Parasitic Reduction

Jiang, Yifan1,2,3; Lu, Yan1,2; Jiang, Junmin3

2024-06-01

10.1109/TCSI.2024.3415955

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS   影响因子和分区

1549-8328

1558-0806

This paper presents a fully-integrated flexible dual-ring switched-capacitor (SC) converter to address the limited output voltage resolution in conventional SC converters. Based on the concept of reconfiguring multiple SC cells in series, the proposed dual-ring SC (DRSC) converter offers various combinations of cascading stages through the outer main ring configuration. Furthermore, the inner sub-ring operation allows for a more flexible selection of output nodes, enabling different power path interconnections and increasing the number of available voltage conversion ratios (VCRs). With 9 fractional VCRs, the converter offers a wide output range and fine output resolution. Compared to traditional SC topologies, the proposed topology exhibits the lowest slow switching limit resistance (R-SSL) and the most favorable G-V-2 metric, indicating high power efficiency. In addition, to reduce the parasitic capacitance, triple-well junction capacitors with increased reverse bias voltage were proposed. Parasitic capacitance with as low to 0.4% of the main capacitance was achieved. 3.9% efficiency improvement was measured. The chip was fabricated in a 180nm CMOS process and measured with 83% peak efficiency and 200mA maximum load current.

Converter ring DC-DC converter dual-ring fractional VCRs G-V-2 metric fully-integrated voltage regulator (FIVR) parasitic reduction switched capacitor (SC) converter

SCI ; EI

英语

通讯

National Natural Science Foundation of China["62122001","62104093"] ; Macao Science and Technology Development Fund (FDCT)[0103/2022/AFJ] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515010557] ; Shenzhen Fundamental Research Program[JCYJ20220818100609021]

Engineering

Engineering, Electrical & Electronic

WOS:001258823500001

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

ENGINEERING

Web of Science

1.Univ Macau, Inst Microelect, State Key Lab Analog Mixed Signal VLSI, Taipa, Macau, Peoples R China
2.Univ Macau, FST DECE, Macau, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Jiang, Yifan,Lu, Yan,Jiang, Junmin. A Fully-Integrated Flexible Dual-Ring Switched-Capacitor DC-DC Converter With Fractional VCRs and Parasitic Reduction[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS,2024.

Jiang, Yifan,Lu, Yan,&Jiang, Junmin.(2024).A Fully-Integrated Flexible Dual-Ring Switched-Capacitor DC-DC Converter With Fractional VCRs and Parasitic Reduction.IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS.

Jiang, Yifan,et al."A Fully-Integrated Flexible Dual-Ring Switched-Capacitor DC-DC Converter With Fractional VCRs and Parasitic Reduction".IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS (2024).