隨著可攜式電子產品的蓬勃發展，我們需要一個高轉換效率的電源控管晶片去延長電池的使用壽命。一般而言，基本的切換式電壓轉化器 (如：降壓型直流-直流轉換器、升壓型直流-直流轉換器) 皆無法有效的利用電池的輸出電壓特性，(以鋰電池為例：其輸出電壓為2.7 V~4.2 V之間)來產生一個穩定的輸出電壓 (如3.3 V)。在本論文中，將介紹一個以平均電流模式控制之非反向升降壓型直流-直流轉換器。此轉換器具有可以完整利用鋰電池輸出電壓特性的優點，因此可以有效的延長電池的使用時間。並且，此轉換器更同時具有高轉換效率、快速的暫態響應以及優異的抗雜訊能力等優點。
此晶片使用台灣積體電路公司0.35μm 2P4M 5V混合訊號製程，以40 S/B封裝，尺寸為1.9×1.7mm2。此轉換器輸出電壓固定為3.3 V，且在輸入電壓範圍為2.5 V ~ 5 V之間時，皆可以提供高達300 mA 的負載電流。

With the increasing use of electrical portable devices, an efficient power management solution is needed to extend battery life. Generally, basic switching regulators (e.g., buck, boost) are not capable of using the entire battery output characteristics effectively (e.g., 2.7–4.2 V for Li-ion) to provide a fixed output voltage (e.g., 3.3V). In this work, an average-current-mode non-inverting buck-boost dc-dc converter is introduced, which can use the full-range output voltage of Li-ion battery with the advantages of high power efficiency, faster transient response, and excellent noise immunity.
The die area of this chip is 1.9x1.7 , which is fabricated by using Taiwan Semiconductor Manufacturing Company (TSMC) 0.35μm 2P4M 5V mixed-signal polycide process. The converter output is set to 3.3V, and can supply up to 300 mA load current. Its input votlage can range from 2.5V to 5V.

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