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   Vol.E84-C   No.10   pp.1602-1611
Publication Date: 2001/10/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
charge-pump circuit,  DC-DC converter,  high-efficiency high-voltage generation,  

Full Text: PDF>>
Buy this Article

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.