本論文針對切換式升壓轉換器進行漣波控制技術的探討並進行實作，更提出一個可達到低成本的漣波控制技術「斜波仿真迴授」。論文內容包括升壓轉換器的原理、漣波控制於升壓轉換器的適應程度與利用實作驗證的兩個例子。
第一個例子是針對目前已出現的控制架構「結合V2與適應性不導通/導通時間控制升壓轉換器」進行探討。並對其電感電流偵測電路進行改善以獲得轉換效率的進一步提升。此系統在適應性不導通與導通時間控制下，可以操作於較廣負載的範圍。在CCM時，適應性不導通時間讓系統可以維持較穩定的切換頻率操作。而在DCM時，PFM的特性讓輕載效率可以獲得提升。另外，V2的迴路也讓系統可以保有較好的輸出調節律兼顧暫態響應的能力。本系統是採用TSMC 0.25μm HV-CMOS製程透過國家晶片中心進行晶片實作。結果顯示，系統在輸入電壓4.5-5-5V與0-300mA的負載範圍均可提供穩定的輸出電壓12V，並且維持堪用的轉換效率，而最高轉換效率可以達到93.8%。在此系統在CCM操作時，可維持950kHz的準定頻特性，而在DCM也可以展現PFM的特性。當系統進行100-300mA的負載變化，最短的回復時間可以達到26μs。另外，於5-300mA的負載變換也可以達到28μs。
本論文在第二個例子中共實現了兩個控制系統。第一個系統為「遲滯電壓控制升壓轉換器使用斜坡仿真迴授技術」，不僅讓原本無法應用於升壓轉換器的遲滯電壓控制得以實現，也讓系統可達到不須補償的低成本的特性。另外，第二個系統「V2遲滯電壓控制升壓轉換器使用斜坡仿真迴授技術」也加入V2迴授的技巧，進一步證明此技術與其他漣波控制技術的結合性。模擬結果顯示，遲滯電壓控制的系統不須要補償元件，在輸入電壓4.5-5.5V與負載電流100-300mA的範圍中，都可讓輸出電壓提升至11.8V並具有一個好的輸出漣波表現。而在使用V2的控制系統在相同的條件下，讓負載調節率可以由250mV/A提升至23.5mV/A，而輸入調節率也從290mV/V提升至20.7mV/V。系統於100-300mA的負載電流變化，也可以達到29μs的回復時間。

This thesis focuses on the study and design of the topic “ripple-based control switching boost converters”. In addition, a ripple-based control technique named “Emulated-Ramp Feedback, ERF” would be newly proposed. The contents of this study includes the fundamental of switching DC/DC boost converter, the analysis of ripple-based control converters and two case design of chip implementation.
First, an inductor switching DC/DC boost regulators with adaptive off/on time (AOOT) control is presented. This system works with the adaptive-off-time control in CCM while the adaptive-on-time control in DCM. The burden caused by the switching frequency variation is reduced due to the quasi-fixed frequency switching by adaptive-off-time modulation under heavy-load. In DCM, adaptive-on-time takes over the operation and improves the power efficiency under light-load condition. In another way, an on-chip sense-FET current sensor is used to decrease the conduction loss caused by the conventional sensing resistor on power stage. The AOOT control boost regulator was implemented with a 0.25 μm high voltage (HV) CMOS process. For conversion specification of 5 V to 12V with a 0-300mA load range, peak efficiency of 93.2% is achieved. Measurement results show that the switching frequency keeps constant at 950 kHz in CCM.
Another case consists of two control system. First system named “Hysteretic Voltage Control Switching Boost Converter with Enulated-Ramp Feedback” achieves the hysteretic voltage control in boost converter and can get the low cost characteristic without any compensator. Besides, the second system named “V2 Hysteretic Voltage Control Switching Boost Converter with Enulated-Ramp Feedback” proves the compatibility of ERF technique in ripple-based control boost converters. The regulator was implemented with a 0.25 μm high voltage (HV) CMOS process. Simulation results show the system which uses hysteretic voltage control can work in conversion specification of 5 V to 12V with a 100-300mA load range. And peak efficiency of 93.7% is achieved. Another system improves the load regulation from 250mV/A to 23.5mV/A, and the line regulation from 290mV/V to 20.7mV/V with V2 feedback. Measurement results show that the switching frequency keeps constant at 950 kHz in CCM. The ability of transient response is promoted, for 28μs recovey time with a 100-300mA load current step.

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