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本文设计并实现了一款宽输入电压范围的开关电容DC-DC转换器，通过优化拓扑和控制策略实现了92%的高效率，解决了传统开关电容转换器效率低、输入范围窄的问题。
The traditional inductor-based buck converter has been the dominant design for step-down switched-mode voltage regulators for decades. Switched-capacitor (SC) DC-DC converters, on the other hand, have traditionally been used in lowpower (<10mW) and low-conversion-ratio (<4:1) applications where neither regulation nor efficiency is critical. However, a number of SC converter topologies are very effective in their utilization of switches and passive elements, especially in relation to the ever-popular buck converters [1,2,5]. This work encompasses the complete design, fabrication, and test of a CMOS-based switched-capacitor DC-DC converter, addressing the ubiquitous 12 to 1.5V board-mounted point-of-load application. In particular, the circuit developed in this work attains higher efficiency (92% peak, and >80% over a load range of 5mA to 1A) than surveyed competitive buck converters, while requiring less board area and less
Vincent Ng, Seth Sanders
University of California, Berkeley, CA