本論文提出一個可提供高速負載暫態響應的降壓型電壓調節器。經由應用變動式鋸齒波在電壓模式控制上，切換式電壓調節器可以擁有簡易的電路設計、固定的切換頻率以及高速的負載暫態響應。在本論文中提出了變動式鋸齒波的電路模型及一個為變動式鋸齒波所設計的控制晶片，此晶片是經由台灣積體電路公司0.35微米製程所實現。在此晶片中具有控制電路及固態開關且控制電路可單獨視為控制器來使用，因此切換式電壓調節器的輸出功率可以經由使用外接開關而被提升。在本論文中有兩個實驗分別針對晶片上開關及晶片外開關來實現低、中功率的實驗。實驗結果顯示出變動式鋸齒波的負載暫態響應可以在10微秒內完成。

A Variable Ramp Signal (VRS) scheme which can provide fast load transient response is proposed. By applying the VRS scheme with the voltage-mode control, buck regulator can have simple circuit design, fixed switching frequency and fast load transient response. The circuit model and IC chip design for the VRS scheme are illustrated in detail in this thesis. The IC chip is fabricated by TSMC 0.35μm 2P4M process. The IC chip has the control circuit and the solid state switch, and the control circuit of the IC chip can serve as a controller independently so that the output power of buck regulator can be enhanced by using the off-chip switch. Two experiments for the on-chip switch and the off-chip switch are performed and the experimental results show that the load transient response for the VRS scheme is within 10μs.

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