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High-Efficiency Charge-Pump Circuits with Large Current Output for Mobile Equipment Applications
Takao MYONO Akira UEMOTO Shuhei KAWAI Eiji NISHIBE Shuichi KIKUCHI Takashi IIJIMA Haruo KOBAYASHI
IEICE TRANSACTIONS on Electronics
Publication Date: 2001/10/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
charge-pump circuit, DC-DC converter, high-efficiency high-voltage generation,
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This paper presents improved versions of three-stage positive-output and two-stage negative-output Dickson charge-pump circuits which are intended to replace switching regulators in video-product CCD driver applications (where 12 V and -6.5 V are needed), and are designed and fabricated in a custom CMOS process. From a power supply Vdd of 4.0 to 5.5 V, the positive charge pump generates a positive output voltage of greater than 3.9Vdd, while the negative charge pump generates a negative voltage of greater than -1.9Vdd, both with efficiencies of greater than 94% at 2 mA output currents.