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High-Efficiency DC–DC Converter with Charge-Recycling Gate-Voltage Swing Control

1
College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
2
Memory Division, Samsung Electronics Co., Ltd., Hwasung 445701, Korea
*
Author to whom correspondence should be addressed.
Energies 2019, 12(5), 899; https://doi.org/10.3390/en12050899
Received: 14 December 2018 / Revised: 3 March 2019 / Accepted: 4 March 2019 / Published: 8 March 2019
This paper proposes a high-efficiency DC–DC converter with charge-recycling gate-voltage swing control with a light load. By achieving a variable gate-voltage swing in a very efficient manner by charge recycling, the power efficiency has been substantially improved due to the lower power consumption and the achieved balance between the switching and conduction losses. A test chip was fabricated using 65-nm CMOS technology. The proposed design reduces the gate-driving loss by up to 87.7% and 47.2% compared to the conventional full-swing and low-swing designs, respectively. The maximum power conversion efficiency was 90.3% when the input and output voltages are 3.3 V and 1.8 V, respectively. View Full-Text
Keywords: Buck converter; high efficiency; charge-recycling; gate-voltage swing control Buck converter; high efficiency; charge-recycling; gate-voltage swing control
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Suh, J.-D.; Yun, Y.-H.; Kong, B.-S. High-Efficiency DC–DC Converter with Charge-Recycling Gate-Voltage Swing Control. Energies 2019, 12, 899.

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