الفهرس 
2 BACKGROUND AND PROPOSED SC TOPOLOGYOnly 14 pages are availabe for public view
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Abstract
The power management unit appropriate for dynamic voltage scaling (DVS) and energy harvesting shall have the capability to operate across a wide input/output voltage levels and achieve high efficiency in the operating range, while providing voltage regulation. This work presents a reconfigurable switched capacitor (SC) DC-DC converter which targets DVS and energy harvesting applications. The proposed converter employs a 4-capacitor interleaving topology. It has 11 conversion ratios 6 stepdown (1/4, 1/3, 1/2, 2/3, 3/4, 1/1) and 5 step-up (4/3, 3/2, 2/1, 3/1, 4/1), making it efficient over wide input/output voltage range. Line and load regulations are provided with the aid of a nearly digital controller to illuminate the static power dissipation.
After expressing the output impedance of the proposed SC topologies and the total power loss, an optimization problem is formulated to maximize the power efficiency. The optimum decision is obtained by a Python program. The program uses a robust derivative-less optimizer. Simulation results are provided to validate the new analysis methods, and show the system outputs.
The thesis is divided into six chapters and one appendix. It includes a list of contents, a list of figures, a list of tables, a list of symbols, and references.
Chapter 1 is the introductory chapter. It includes the problem statement, and the target applications of this work. Also, it explains the loss mechanisms of SC DC-DC converters.
Chapter 2 contains a literature survey which presents and classifies the state of art reconfigurable SC DC-DC converters. Also, it explains the characteristics of the proposed SC topology and the new output impedance analysis.
Chapter 3 formulates an optimization problem to maximize the power efficiency.
Chapter 4 presents the system architecture and circuit implementation in 130-nm CMOS technology.
Chapter 5 shows the system simulation results.
Chapter 6 compares the proposed reconfigurable SC DC-DC converter with the state of art converters, and states the advantages and disadvantage of the proposed system. Finally, it concludes the work and gives suggestions for future work.