The relationship between output voltage and capacitance in switched-capacitor DC-DC converter was investigated

and the reasons for output voltage ripple in the converter were analyzed.Aiming at the difficulties in fabricating large capacitors in the converter

a new topology of active capacitance multiplier based on OTA and CCⅡ was proposed.This circuit realized the functions of floating capacitor and grounded capacitor in switched-capacitor converter with fewer components.Taking second-order switched-capacitor DC-DC converter as an example

we simulated output performances of traditional and novel circuit structures respectively by software PSPICE.The results show that the performance of novel converter with 100pF capacitors is equivalent to the conventional converter with 200nF capacitors.And also the converter based on active capacitance multiplier has much lower output voltage ripple.