自動基體電壓切換電路整合於單輸入電壓單電感雙輸出直流-直流電源轉換器

Abstract

隨著科學的進步與科技的日新月異，人們為了滿足自我本身的需求， 設計了許多可攜式的裝置(Protoble Device)，而這些可攜式的裝置在你我的生活與身邊都是隨手可見，例如: 行動電話(Mobile Phone) 、個人隨身數位助理(Personal digital assistance)、MP3/MP4、Netbook、...etc。這些可攜式的行動裝置不外乎短小輕薄，擁有強大的功能或是長效的使用時間，在現在節能減碳的風潮下，如何能有效的使用能源並且降低碳排放量的趨勢已成為當代的顯學，其中如何有效的管理及使用能源更是目前強調的重點，所以如何增加電源效率，是目前電源管理設計中很重要的一項因素。除此之外，體積小也是現今市場上重要的趨勢。因此要如何設計出體積小、效率高的電源轉換器就成為電源管理設計中的一大挑戰。 為了能增加電池的使用時間及提高電池的效能，本論文提出一個具有自動基體電壓切換單輸入雙輸出電源轉換器。此電源轉換器使用單一輸入電源產生出兩個不同準位的輸出電壓，用此方式來達到節省電源電路元件的使用數量以及有效的使用輸入能量，同時利用自動基體電壓切換電路，減少漏電和防止latch-up 發生，更是能有效地增加電源使用效率。 本論文實現了一個新型的自動基體電壓切換電路搭配上單電源輸入單電感雙輸出直流-直流電源轉換器。輸入電壓為1.8V，輸出電壓為1.2V和2.4V，最大電源負載為40mA。新型自動基底電壓切換電路(ASVSC)是利用VIS 0.35um 3.3V/5V 2P4M製程進行模擬及製作驗證。

In the recently year, the science and the technology continue to enter into a new stage. A lot of high technology device is made to meet human desired function. These portable devices have slim, light, and powerful advantags. People always need them to help their life and job comfortable. For example: mobile phone, personal digital assistants (PDA), MP3/MP4, netbook, and etc, these portable devices have fashion, light weight, powerful function, and long operating time. However, it is an important for energy saving and carbon reduction. How to save more energy and raise the power efficiency for the portable device becomes more and more essential owing to the variety of electronic devices. That is power management control field needs to further discuss to effectively reduce the power consumption. As a result, it is a big challenge to design a power management IC to have high power efficiency and small die size at the same time. This thesis achieves the goal for increasing the battery life time and raising power efficiency. In other words, a single-inductor dual-output converter (SIDO) SIMO with a novel design circuit of automatic substrate switching circuit is presented to reduce the sze of power module and provide high power conversion efficiency. The proposed SIDO coverter with only one inductor outputs two output voltages, which contain one step-up voltage and one step-down voltage. The proposed circuit can reduce the number of power device and thus resudces the chip size. Furthermore, the automatic substrate switching circuit is utilized in the SIDO converter to avoid the leakage and latch-up effects. The novel automatic substrate voltage switching circuit (ASVSC) can improve the performance of the SIDO converter. The automatic substrate switching circuit in the SIDO DC-DC converter uses the supply voltage of 1.8V and provides the dual outputs of 1.2V and 2.4V. The maximum load is approximated to 40mA for each output. The ASVSC chip was simulated and fabricated by VIS 0.35um 3.3V/5V 2P4M process of CMOS technology. The power consumption can be reduced to half that of the previous low power design. Besides, the accuracy can be higer than those of conventional designs