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

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3 Author(s)
Yean-Kuo Luo ; Department of Electrical Engineering, National Cheng Kung University Tainan, Taiwan ; Ke-Horng Chen ; Wei-Chou Hsu

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 5 V and maximum load current 5 mA with the constant frequency regulation. This design is based on TSMC 0.6 mum 5 V/12 V CMOS technology. The output ripples are reduced from 6.1 mV to 3.7 mV. Besides, the power consumption is minimized because of the integration of the nano-ampere CMOS reference voltage.

Published in:

Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on

Date of Conference:

Aug. 31 2008-Sept. 3 2008