الفهرس 
Switched-Capacitor DC-DC ConvertersOnly 14 pages are availabe for public view
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Abstract
This thesis presents all-digital fully-integrated switched-capacitor DC-DC convert- ers. Being all-digital, it allows the ease of design porting to different technology nodes. Two proposed switched-capacitor DC-DC converters are presented in this work to cover a wide range of applications.
The first prototype should fit with the applications with load currents that do not exceed 10 mA. The implementation complexity of this prototype is not high because the dynamic range is not very large. This proposed DC-DC converter prototype uses a new technique called Enhanced Ripples Technique (ERT) along with the Pulse Frequency Modulation (PFM) to enhance the voltage ripples of the conventional PFM regulation-based SC DC-DC converter.
System-level design is done through MATLAB models to extract the design param- eters of the DC-DC converter to achieve maximum efficiency and smallest values of the load regulation and the output voltage ripples.
Circuit implementation is done on 0.13 mm CMOS technology using thick oxide devices to convert the input voltage from the battery (3.3 - 4 V) to an output voltage of 1 V. The proposed design achieves peak efficiency of 69% and delivers up to 12.5 mA load current. Output voltage ripples is less than 50 mV.
The second prototype should fit with the applications with load currents up to 100 mA. This prototype is targeting high-performance applications which requires very low voltage ripples and low values of load regulation while the dynamic range is large.
This proposed DC-DC converter prototype is based on using capacitance modulation and pulse frequency modulation techniques to be able to cover a wide dynamic range of load currents while keeping the load regulation and the output voltage ripples at small values and the efficiency at maximum possible value. Phase interleaving has been used to further reduce the output voltage ripples.
System-level design is done through MATLAB models to extract the design param- eters of the DC-DC converter to achieve maximum efficiency and smallest values of the load regulation and the output voltage ripples. A controller has been introduced to track the optimum point across different values of the load current.
Circuit implementation is done on 0.13 mm CMOS technology using thick oxide devices to convert the input voltage from the battery (3.3 - 4 V) to an output voltage of 1 V. The proposed design achieves peak efficiency of 63% at power density of 0.095
W/mm2 and delivers up to 100 mA load current. Output voltage ripples and load
regulation are less than 16 mV and 0.02%/mA, respectively.