A dual-phase charge pump regulator with nano-ampere switched-capacitor CMOS voltage reference for achieving low output ripples

In this paper, a regulated dual phase charge pump with switched-capacitor voltage reference is presented. This charge pump uses a dual phase technique to reduce the output ripple and combines the switch-capacitor CMOS voltage reference to diminish the chip area and quiescent current. This charge pump provides output voltage 5V and maximum load current 5mA with the constant frequency regulation. This design is based on TSMC 0.6μm 5V/12V CMOS technology. The output ripples are reduced from 6.1mV to 3.7mV. Besides, the power consumption is minimized because of the integration of the nano-ampere CMOS reference voltage.