A Fully-Integrated Multi-Mode Switched-Capacitor DC-DC Converter with Switch Array Modulation

• Main Authors: Cheng, Hao-Chung, 鄭皓中
• Other Authors: Chen, Po-Hung
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/zrxa89

碩士 === 國立交通大學 === 電子工程學系 電子研究所 === 104 === Recently, low operating voltage and low power consumption for SoC system have become a solution to extend the lifespan of battery. In this case, power management unit is required to convert the output voltage produced by battery to proper dc voltage, and also provides from several uW up to several mW output power to loading circuits. However, in SoC system, any off-chip element will lead to not only the rising of cost, but also increase the difficulty of fully-integration on a multi-core chip. As a result, off-chip elements are not allowed, especially in SoC application. Therefore, fully-integrated dc-dc converter is an essential technique to be implemented in multi-core application and SoC system. In this thesis, the requirement of fully-integration is fulfilled by using switched-capacitor (SC) dc-dc converter. Besides, the topology of digital linear regulator (DLDO) is combined into the converter core circuit. The proposed SC circuit is able to scale output voltage by the characteristic of DLDO. In order to improve the effect of regulation, interleaving technique is utilized to reduce the output voltage ripple. Moreover, to reduce quiescent current, all the control circuits in this thesis are designed as digital circuits. The simulation results show that the proposed circuit is able to provide 86% peak conversion efficiency and remains more than 60% within the range of desired output voltage