The introduction and development of hybrid DC-DC converters present a valuable opportunity in on-chip power management, as they combine the advantages of buck and switched-capacitor converters while alleviating shortcomings such as conversion efficiency and sizing requirements. In this paper, a new control methodology is presented for the recently developed 5-level hybrid DC-DC converter, which utilizes the Virtex 5 LX50T FPGA to drive the converter. This control method allows for a higher switching frequency of 1MHz and an improved conversion efficiency while also allowing for dynamic voltage control based on the desired output voltage. Simulations as well as a test circuit are used to illustrate the proper control functionality, with tabulated results that showcase the efficiency advantage over prior control methods as well as the buck and 3-level hybrid converters.


Electronics & Communications Engineering Department

Degree Name

MS in Electronics & Communication Engineering

Graduation Date


Submission Date

May 2017

First Advisor

Ismail, Yehea

Committee Member 1

Abou Auf, Ahmed

Committee Member 2

Mohamed, Khaled Salah


80 p.

Document Type

Master's Thesis


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Institutional Review Board (IRB) Approval

Not necessary for this item


This thesis could not have happened without the contribution of many people over the past 2 years. First of all, I would like to acknowledge the guidance of my thesis advisor, Dr. Yehea Ismail, as he provided me with immense support during my years of graduate studies, including the many courses I took under his exceptional tutelage. This culminated in his provision of the opportunity to investigate the exciting topic of DC-DC converters, and to utilize the vast resources of the Center of Nano-electronics and Devices at AUC, well as valuable feedback during every stage of development, which had no small part in this project coming to fruition and obtaining satisfactory results. Thanks also must go to Engineer Abdullah Amgad, who provided his assistance and wealth of knowledge whenever possible to help achieve the goal at hand. Thanks also go to my colleagues at Mentor Graphics and at the American University in Cairo, especially Engineer Ahmed Ali who shared plentiful knowledge regarding the programming of microcontrollers, as well as Engineer Mohamed Abdel Salam, whom I consulted often regarding VHDL coding structures and design. Finally, I would like to extend my thanks to my parents, without whose immense support, faith and understanding I could have never made it this far.