题目/Title：
                        A variable step-down conversion ratio switched capacitor DC-DC converter for energy harvesting systems working in intermittent mode

作者/Author：
                        Wenhan Hao,Chen Jia,Hong Chen,Chun Zhang,Zhihua Wang

期刊/Journal：半导体学报 Chinese Journal of Semiconductors

年份/Issue Date：2009.Dec.

卷（期）及页码/Volume（No.）&pages：Vol.30, No.12, pp. 1250081 - 5

摘要/Abstract：

Energy harvesting systems stimulate the development of power management for low power consumption applications. Improving the converter efficiency of power management circuit has become the significant issue of the energy harvesting system design. This paper presents a variable step-down conversion ratio switched capacitor (SC) DC-DC converter to advance the converter efficiency of charge on the stored capacitor in a Wireless Monitoring System of Orthopedic Implants. The converter is designed to work at 1MHz switching frequency and achieves 15V to 2V conversion. Measurement results show that the converter efficiency can reach 42% including all circuit power consumption, which is much higher than previous work.