In order to achieve the voltage regulation for high power switched-capacitor converters,the voltage regulation method of LC equivalent circuit using capacitor charging  loop is studied.The concrete implementation is that the analysis on the charging current and the charge-discharge process of the capacitors is made,then the output voltage regulation can be realized by changing the switching angle of the sinusoidal charging current.At the same time,it is necessary that the third quadrant operation of MOSFETs and special stray inductance arrangement be utilized in order to reduce the power dissipation and EMI noises from stray inductors in switches.The analysis and experiment results,on which voltage doubler has been built using two switched-capacitor prototype boards with variable output voltage regulation capability,show that the proposed voltage regulation method can not only achieve the soft switch function,and its efficiency can exceed the theoretical maximum efficiency value by traditional method.