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A 470-nA Quiescent Current and 92.7%/94.7% Efficiency DCT/PWM Control Buck Converter with Seamless Mode Selection for IoT Application
Zeng,Wen Liang1,2,3; Ren,Yuan1; Lam,Chi Seng1,2,3; Sin,Sai Weng1,2,3; Che,Weng Keong2,5; Ding,Ran4; Martins,Rui Paulo1,2
2020-11-01
Source PublicationIEEE Transactions on Circuits and Systems I: Regular Papers
ISSN1549-8328
Volume67Issue:11Pages:4085-4098
AbstractAn ultra-low quiescent current dual-mode buck converter system is designed for IoT application, which includes a double clock time (DCT) and a pulse-width-modulation (PWM) control modes. The proposed DCT mode can reduce the conversion loss over a wide loading range from nA-to-mA and achieve seamless mode transition from DCT to PWM control. Implemented in a 0.18μm CMOS, this converter achieves a peak efficiency of 92.7%94.7% in DCT/PWM and >80% efficiency from 10μ A to 50 mA (5000x), with a wide input voltage from 2 V to 5 V. A quiescent current of 470 nA including bandgap voltage reference and internal oscillator is achieved. The DCT-to-PWM mode selection mechanism achieves an undershoot of 80 mV at 11μs recovery time when load current jumps from 6.67μ A to 50 mA.
Keywordbuck converter discontinuous conduction mode (DCM) double clock time (DCT) control Internet of things (IoT) mode selection pulse-width-modulation (PWM) current mode control ultra-low-quiescent current
DOI10.1109/TCSI.2020.3006200
URLView the original
Language英语
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.State Key Laboratory of Analog and Mixed-Signal,VLSI,University of Macau,999078,Macao
2.Institute of Microelectronics,University of Macau,999078,Macao
3.Department of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,999078,Macao
4.Allwinner Technology Company Ltd.,Zhuhai,519085,China
5.Instituto Superior Técnico,Universidade de Lisboa,Lisbon,1049-001,Portugal
First Author AffilicationUniversity of Macau;  Faculty of Science and Technology
Recommended Citation
GB/T 7714
Zeng,Wen Liang,Ren,Yuan,Lam,Chi Seng,et al. A 470-nA Quiescent Current and 92.7%/94.7% Efficiency DCT/PWM Control Buck Converter with Seamless Mode Selection for IoT Application[J]. IEEE Transactions on Circuits and Systems I: Regular Papers,2020,67(11):4085-4098.
APA Zeng,Wen Liang,Ren,Yuan,Lam,Chi Seng,Sin,Sai Weng,Che,Weng Keong,Ding,Ran,&Martins,Rui Paulo.(2020).A 470-nA Quiescent Current and 92.7%/94.7% Efficiency DCT/PWM Control Buck Converter with Seamless Mode Selection for IoT Application.IEEE Transactions on Circuits and Systems I: Regular Papers,67(11),4085-4098.
MLA Zeng,Wen Liang,et al."A 470-nA Quiescent Current and 92.7%/94.7% Efficiency DCT/PWM Control Buck Converter with Seamless Mode Selection for IoT Application".IEEE Transactions on Circuits and Systems I: Regular Papers 67.11(2020):4085-4098.
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