An Area Efficient, High-Resolution Fully Foldable Switched-Capacitor DC-DC Converter with 16% Efficiency Improvement

A Fully foldable modified Dickson architecture (FFMDA) based switched-capacitor dc-dc converter is proposed in this paper. The proposed converter uses only 4-stages in contrast to 5-stages in a regular Foldable Dickson converter to achieve the same number of gain settings, thereby becomes 20% area efficient. Peak efficiency improvement of 16% is achieved with a fully-foldable nature of proposed architecture in combination with subtraction mode. The converter is implemented in 130nm technology and uses stacked MOS and MIM capacitors to get the highest density. Operating at 2V input, the converter provides a wide range of regulated output voltages from 0.2 to 1.28V and delivers load current from 100 mu A to 2mA with average and peak efficiency of 71.35% and 87.5%, respectively.