A Wide Load-Range Synchronous Dual-Mode Boost Regulator with enhanced Light-Load Efficiency and Suppressed Output Ripple

• Main Authors: Wei, Chung-Hsuan, 魏崇軒
• Other Authors: Hung, Chung-Chih
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/3wc3cb

碩士 === 國立交通大學 === 電機工程學系 === 103 === In recent years, portable products have become the most popular commodity for consumers, so the market share has been rising rapidly. Because handheld devices rely on the battery power, therefore, the voltage conversion for a variety of batteries has become an important issue. This thesis also committed to the various DC-DC converters for portable products. The output voltage might become unstable due to load or supply voltage variations, which might cause abnormal operation or deteriorate the performance of the portable device. This thesis presents a dual mode boost DC-DC converter to achieve high efficiency. The converter uses the on-chip current sensing technique to increase efficiency and reduce the compensation complexity. The output voltage is 5 V while the input voltage ranges from 2.7 V to 3.3 V. The average conversion efficiency is about 90% and the maximum load current is 500mA. Using different on time in PFM mode, the output ripple can be reduced than other art.. The chips presented in this thesis were fabricated by Taiwan Semiconductor Manufacturing Company （TSMC）0.35μm 2P4M 3.3V mixed‐signal CMOS process. The chip area is 1.647mm×1.647mm.