IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
A 1.2 mV ripple, 4.5 V charge pump using controllable pumping current technology
Cece HuangYu WangTeng ChenLiyin FuQi WangZongliang Huo
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JOURNALS FREE ACCESS

2017 Volume 14 Issue 18 Pages 20170699

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Abstract

This paper represents a 4.5 V regulated charge pump with extremely small ripple. The pump designed with Voltage Doubler (VD) significantly reduces the output ripple voltage. In addition, this circuit utilizes a controllable pumping current (CPC) technology, which achieves automatically adjusting output current by feedback mechanism and resizing transfer transistors. The proposed charge pump has been demonstrated in 0.32 µm 3D NAND periphery technology under 3 V power supply. Simulation results show that the output ripple voltage is 1.2 mV at 5 mA load current with 0.1 µF load capacitance. The maximum current drivability and power efficiency is 8 mA and 81% respectively.

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© 2017 by The Institute of Electronics, Information and Communication Engineers
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