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

Article ID: 14.20170699

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This paper represents a 4.5V 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 0.32µm 3D NAND periphery technology under 3V power supply. Simulation results show that the output ripple voltage is 1.2mV at 5mA load current with 0.1µF load capacitance. The maximum current drivability and power efficiency is 8mA and 81% respectively.

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