Continuously Tunable Switched-Capacitor DC-DC Conversion Beyond Discrete Ratios
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Title: Continuously Tunable Switched-Capacitor DC-DC Conversion Beyond Discrete Ratios
Abstract:
Switched-capacitor (SC) DC-DC converters are easy to integrate in CMOS, but they typically offer only a few discrete conversion ratios, so efficiency drops once Vin or Vout moves away from those points. This talk presents a continuously scalable conversion-ratio (CSCR) SC approach that enables fine-grain ratio control over a wide range. The operating principle is explained from a charge-transfer perspective, followed by what this implies for practical IC design: where the main losses come from, how they change across the tuning range, and which constraints set the usable ratio window. The talk then sketches how the same idea can be adapted to step-down and step-up use cases, and summarizes circuit/architecture techniques that help extend the ratio range while keeping efficiency high. Example application settings include energy-harvesting power management and low-power embedded systems with large voltage variability.
Speaker Biography:
Sijun Du is an Assistant Professor in the Department of Microelectronics at Delft University of Technology, Netherlands. His research interests include energy-efficient integrated circuits and systems, with a special emphasis on energy harvesting, wireless power transfer, and DC/DC converters for IoT and biomedical applications. He has authored or co-authored over 100 peer-reviewed technical papers and holds 5 patents. He has served as a program committee member of ISSCC and ESSERC, and as a sub-committee chair for ICECS and ISCAS. Additionally, he is a technical committee member for IEEE PELS and CASS, a Senior Member of IEEE, and a recipient of the prestigious NWO VENI grant.
Date and Time
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No. 825 Zhangheng Road
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Fudan University, Zhangjiang Campus, Pudong New District
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Shanghai, Shanghai
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China
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Building:
No. 1 Research Building
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Room Number:
Lecture Hall 222, 2F
- Starts
17 March 2026 04:00 PM UTC
- Ends
23 March 2026 04:00 PM UTC
- No Admission Charge
Speakers
Prof. Sijun Du of Delft University of Technology
Topic:
Continuously Tunable Switched-Capacitor DC-DC Conversion Beyond Discrete Ratios
Switched-capacitor (SC) DC-DC converters are easy to integrate in CMOS, but they typically offer only a few discrete conversion ratios, so efficiency drops once Vin or Vout moves away from those points. This talk presents a continuously scalable conversion-ratio (CSCR) SC approach that enables fine-grain ratio control over a wide range. The operating principle is explained from a charge-transfer perspective, followed by what this implies for practical IC design: where the main losses come from, how they change across the tuning range, and which constraints set the usable ratio window. The talk then sketches how the same idea can be adapted to step-down and step-up use cases, and summarizes circuit/architecture techniques that help extend the ratio range while keeping efficiency high. Example application settings include energy-harvesting power management and low-power embedded systems with large voltage variability.
Biography:
Sijun Du is an Assistant Professor in the Department of Microelectronics at Delft University of Technology, Netherlands. His research interests include energy-efficient integrated circuits and systems, with a special emphasis on energy harvesting, wireless power transfer, and DC/DC converters for IoT and biomedical applications. He has authored or co-authored over 100 peer-reviewed technical papers and holds 5 patents. He has served as a program committee member of ISSCC and ESSERC, and as a sub-committee chair for ICECS and ISCAS. Additionally, he is a technical committee member for IEEE PELS and CASS, a Senior Member of IEEE, and a recipient of the prestigious NWO VENI grant.
Email:
Address:Netherlands
This event is sponsored by the IEEE Solid-State Circuits Society Distinguished Lecturer Program.
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