本文提出以漣波模式控制之單電感雙輸出降壓型轉換器，漣波模式不僅降低了補償器設計之複雜度，同時也減少了暫態恢復時間。為了利於固定頻率的設計，應用於單電感雙輸出降壓轉換器的漣波控制模型必須詳加定義，因此本文探討操作於連續導通模式之單電感雙輸出降壓轉換器之直流分析；除此之外，此設計附加之相序切換機制可避免能量分配法所帶來之電壓湧升現象。本晶片實現於台灣積體電路公司0.35μm 2P4M 5V混合訊號製程，轉換器輸入及輸出電壓分別設定為5V及1.8V/1.5V，實驗測試所得之切換頻率在輕重載可固定1MHz左右，暫態時間上升與下降分別為12μs與13μs。

This thesis proposes a ripple-based control for a single-inductor dual-output (SIDO) buck converter. The ripple-based control not only reduces the complexity of the compensator design, but also reduces the load transient time. However, the variable frequency operation under different loading conditions can complicate the filter design. In order to understand the variable frequency operation, the ripple-based control model applied to a single-inductor dual-output buck converter must be understood in detail. Therefore, this thesis demonstrates the DC analysis of a SIDO operating in continuous conduction mode. In addition, the phase-sequence interchange mechanism is introduced to this design to avoid the voltage surge caused by the energy distribution method.
To verify the feasibility of the proposed method, the chip-scaled circuit is implemented under the 0.35μm 2P4M 5V mixed signal process of Taiwan Semiconductor Manufacturing Corporation. The input and output voltages of the converter are set to 5V and 1.8V / 1.5V, respectively. The switching frequency can be fixed around 1MHz under heavy or light load condition, and the transient rise and fall times are within 12μs and 13μs, respectively.

Keywords: SIDO, Power distribution mechanism, Fast transient response, Adaptive off-time control(AFT)

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