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IEICE TRANSACTIONS on Electronics

A 65nm CMOS Process Li-Ion Battery Charging Cascode SIDO Boost Converter with 89% Maximum Efficiency for RF Wireless Power Transfer Receiver

Yasuaki ISSHIKI, Dai SUZUKI, Ryo ISHIDA, Kousuke MIYAJI

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Summary :

This paper proposes and demonstrates a 65nm CMOS process cascode single-inductor-dual-output (SIDO) boost converter whose outputs are Li-ion battery and 1V low voltage supply for RF wireless power transfer (WPT) receiver. The 1V power supply is used for internal control circuits to reduce power consumption. In order to withstand 4.2V Li-ion battery output, cascode 2.5V I/O PFETs are used at the power stage. On the other hand, to generate 1V while maintaining 4.2V tolerance at 1V output, cascode 2.5V I/O NFETs output stage is proposed. Measurement results show conversion efficiency of 87% at PIN=7mW, ILOAD=1.6mA and VBAT=4.0V, and 89% at PIN=7.9mW, ILOAD=2.1mA and VBAT=3.4V.

Publication
IEICE TRANSACTIONS on Electronics Vol.E103-C No.10 pp.472-479
Publication Date
2020/10/01
Publicized
2020/04/22
Online ISSN
1745-1353
DOI
10.1587/transele.2019CTP0003
Type of Manuscript
Special Section PAPER (Special Section on Analog Circuits and Their Application Technologies)
Category
Electronic Circuits

Authors

Yasuaki ISSHIKI
  Shinshu University
Dai SUZUKI
  Shinshu University
Ryo ISHIDA
  Shinshu University
Kousuke MIYAJI
  Shinshu University

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