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本文提出一种混合Dickson开关电容DC-DC转换器，可直接连接锂电池，实现从3-4.2V到0.3-0.5V的大降压比转换。该转换器峰值效率达94.2%，输出电流1.53A，解决了便携设备中高效紧凑电源转换的难题。
University of Illinois, Urbana, IL Owing to the need for low power consumption, portable and wearable electronics operate at low voltages, typically below 1V, with recent designs in near- and subthreshold operation resulting in voltages down to 0.3 to 0.5V. Meanwhile, voltage range of the most common energy source – the Li-ion battery – is 3 to 4.2V, motivating the need for compact power converters capable of large conversion ratio with wide and efficient voltage regulation. It is challenging for conventional buck converters [1] to achieve high power density and efficiency at large conversion ratios, due to the large device voltage stress relative to the output. The inductor remains the largest component, owing to the limited switching frequency achievable at a reasonable efficiency. On the other hand, switched-capacitor (SC) converters [2] have been shown to achieve high efficiencies at some discrete high conversion ratios, but their applications
Wen-Chuen Liu, Pourya Assem, Yutian Lei, Pavan Kumar Hanumolu, Robert Pilawa-Podgurski