本論文實作具動態電壓調節之無電流感測多模式數位控制直流直流控制器，使用漸嶄露頭角的數位電源技術，提出了以無需電流感測的方式，實現三種模式(PWM、PFM和ACP) 操作和自動切換，能有效提升輕載效率和擁有寬負載範圍…等好處。同時，也提出adaptive current position (ACP)轉態中介模式，改善極輕載到極重載嚴重的電壓擾動現象。此外，亦針對本論文特性，發展一套適合動態電壓調整操作流程，配合支援動態電壓調的處理器，進而改善應用端的效率。本論文以FPGA為實驗平台，進行量測並驗證所提出之概念，證明確實能提昇效率，可改善劇烈負載變動下的暫態表現，結果與預期相符。最後將驗證過的矽智財以TSMC 1P6M 0.18um Cell-Based製程下線。

This thesis presents a current-sensorless multi-mode digital DC-DC controller for DVS application. The duty compare algorithm (DCA) and the pseudo current roof design approach are proposed for automatic mode changing and pulse frequency modulation (PFM). The controller can seamlessly change modes between pulse width modulation (PWM), PFM, and adaptive current position (ACP). The PWM and PFM modes increase light-load efficiency and maintain good regulation over a wide load range. When the load rapidly changes from light to heavy, ACP can enhance the transient response. In the presence of dynamic voltage scaling (DVS) capability, the DC-DC converter in this thesis can adjust its output voltage to meet the application requirements. The FPGA experimental results show that the proposed architecture improves both efficiency and regulation. After FPGA prototyping, the proposed DC-DC converter has been implemented in TSMC 1P6M 0.18μm CMOS technology.

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