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Design and Fabrication of Buck-Boost DC-DC Converter and Linear Regulator With Digitally-Tunable Output Voltage in 0.18µm-HV BCD CMOS Process

Kargaran, Masoud | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52358 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Medi, Ali
  7. Abstract:
  8. In this project, an inverting Buck-Boost converter with two negative linear regulator is designed, implemented and measured in CMOS 0.18μm-HV BCD technology. Input voltage of Buck-Boost converter can vary from +15V to +28 and output voltage is digitally adjustable from -1V to -10V. Maximum output current of the converter is 300mA. A current mode controller and a lag compensator is used to control the converter. A high speed highside current sensor is designed and used in current mode controller. Sampled current of the current sensor is also used in a current limit circuitary to limit the maximum current of highside switch. Two negative linear regulators are placed at the output of the conrverter to mitigate the switching noise of the converter. One of these proposed structure only sinks current and the other is able to sink and source current. Each regulator has an over current flag circuitary. Output voltage of each regulator is independently and digitally adjustable from zero to -10V and the maximum output current of each regulators is 30mA. The output voltage level of the converter and regulators and other parts of system including over current flag levels are digitally programmable
  9. Keywords:
  10. Buck/Boost Converter ; Current Mode Controller ; Linear Regulator ; High Voltage CMOS Technology ; Complementary Metal Oxide Semiconductor Technology (CMOS) ; High-Voltage DC-DC Converter

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