近年來單電感雙輸出直流/直流轉換器常應用於手持式消費性電子產品上。相較於單電感單輸出(SISO)轉換器而言，單電感雙輸出(SIDO)降壓轉換器因為有輸出能量分配以及互擾效應之影響，因此操作較為複雜。本論文利用PSI作為基本架構加入放電路徑並提出了低互擾效應之SIDO降壓轉換器。相較於傳統的PSI降壓轉換器，改良後的PSI架構不僅可以解決能量分配的問題也可簡化PSI的操作程序。值得注意的是本論文所提出的轉換器操作於連續導通模式下，所以對於負載能力的部分可以得到顯著的改善。為了驗證本論文所提出之架構的有效性，本論文使用了PCB板去做實現，實測結果證實了當本論文所提出的SIDO操作於連續導通模式下輸入電壓為5V輸出電壓1.8V及1.5V時具有低互擾特性。

In recent years, single inductor dual output(SIDO) DC-DC converter is widely used in 3C electronic devices. Compared to the control of a single inductor single output (SISO) converter, the SIDO buck converter control is much more complex. The energy distribution and cross regulation problems are the key points that SIDO design should solve. This thesis proposes a low cross regulation SIDO converter using the PSI control with a discharge path. Compared to the original PSI scheme buck converter, the refined PSI scheme not only solves the energy dissipation problem but also simplified the PSI procedures. It is noted that the proposed converter operates at continuous conduction mode (CCM) so that loading capability is evidently improved. To validate efficacy of the proposed scheme, a prototype circuit is implemented on a PCB board. Test results confirm the performance of the low cross regulation on the SIDO converter when it steps down 5V input voltage to both 1.8V and 1.5V output voltages at CCM.

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