Abstract: In the era of rapid development of information and intelligence,the requirement for portable power supply is getting higher and higher. The excellent charge-discharge performance of Farah Capacitance makes it a hotspot in the research of power supply technology. In this paper,the key parameters the impedance function of Farah Capacitance is modeled and analyzed,the key parameters affecting Farah Capacitance were found. The high efficiency TPS63020 that is a step-up and step-down chip is selected to simulate the parameters. The key circuit of high efficiency and low power output current tracking management of Farah Capacitance is designed. The high precision output tracking output of Farah Capacitance is realized by using LED as energy consumption object. The output efficiency is over 88%. This research has certain research significance and application value for the replacement of lithium batteries by Farah Capacitance and the development of intellectualization.