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High-Frequency Switching Power Converters

High-Frequency Switching ConvertersThe off-chip passive components (inductors and capacitors) in conventional switching power converters are becoming increasingly difficult to accommodate in many electronic devices due to their high cost and large footprint. This difficulty is exacerbated by the fact that many that many of these devices now require a large number of separate power supplies in order to manage power consumption and avoid coupling effects between the different parts of the system.



This research focuses on leveraging the dramatic scaling in CMOS technologies to build switching power converters with very high switching frequencies in order to reduce the size of passive components to levels where they can be implemented on chip or on package substrates while achieving higher power conversion efficiency than on-chip linear alternatives.

Related Publications:

  1. Wei Fu, and Ayman Fayed, “A Feasibility Study of High-Frequency Buck Regulators in Nanometer CMOS Technologies,” 2009 IEEE Dallas circuits & Systems Workshop (DCAS), Dallas, Texas, Oct. 2009, pp. 31-34.

  2. Wei Fu and Ayman Fayed, “A Self-Regulated 588 MHz Buck Regulator with On-chip Passives and Circuit Stuffing in 65nm,” 2014 IEEE Midwest Symposium on Circuits and Systems (MWSCAS), College Station, Texas, Aug. 2014, pp. 338-341. Recipient of best student paper award (shared with other papers).

  3. Wei Fu and Ayman Fayed, “Power Conversion Schemes in Mixed-Signal SoCs,” 2014 IEEE Int. symposium on circuits and Systems (ISCAS), Melbourne VIC, Australia, Jun. 2014, pp. 606-609.

  4. Yongjie Jiang and Ayman Fayed, “On-Chip Input and Ground Ringing Suppression in High-Frequency Buck Converters,” 2015 Midwest Symposium on Circuits and Systems (MWSCAS), Fort Collins, Colorado, Aug. 2015, pp. 1-4.

  5. Wei Fu, Siang Tan Tong, and Ayman Fayed, “Switching and Conduction Loss Analysis of Buck Converters Operating in DCM-only Scenarios,” 2013 IEEE Int. symposium on circuits and Systems (ISCAS), Beijing, China, May 2013, pp. 921-924.

  6. Yogesh K. Ramadass, Ayman A. Fayed, and Anantha P. Chandrakasan, “A Fully-Integrated Switched-Capacitor Step-Down DC-DC Converter With Digital Capacitance Modulation in 45 nm CMOS,” IEEE Journal of Solid-State Circuits, vol. 45, no. 12, pp. 2557-2565, Dec. 2010.

  7. Yogesh K. Ramadass, Ayman A. Fayed, Baher Haroun, and Anantha P. Chandrakasan, “A 0.16mm2 Completely On-Chip Switched-Capacitor DC-DC Converter using Digital Capacitance Modulation for LDO Replacement in 45nm CMOS,” 2010 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, Feb. 2010, pp. 209-210,209a.