DocumentCode :
2064971
Title :
20.5 A 2-/3-phase fully integrated switched-capacitor DC-DC converter in bulk CMOS for energy-efficient digital circuits with 14% efficiency improvement
Author :
Junmin Jiang ; Yan Lu ; Cheng Huang ; Wing-Hung Ki ; Mok, Philip K. T.
Author_Institution :
Hong Kong Univ. of Sci. & Technol., Hong Kong, China
fYear :
2015
fDate :
22-26 Feb. 2015
Firstpage :
1
Lastpage :
3
Abstract :
Reducing the supply voltage of digital circuits to the sub- or near-threshold regions minimizes dynamic power consumption and achieves better efficiency [1]. This technique is widely used in energy-efficient applications, and is especially beneficial for wirelessly powered devices such as wearable electronics, biomedicai implants and smart sensor networks. Such devices have long standby times and battery-less operation is highly desirable. As shown in Fig. 20.5.1, for a typical wireless power transmission system, there is a gap between the rectified VIN (>2V) and the low supply voltage VOUT (<;700mV) for powering up energy-efficient digital circuits. To bridge this voltage gap without sacrificing compact size, fully integrated power converters with a low voltage conversion ratio (M=Vout/VIN) and high efficiency are needed. However, a low M results in low efficiency for linear regulators and fully integrated buck converters. On the other hand, fully integrated switched-capacitor power converters (SCPCs) are good alternatives that can achieve high efficiency at low M in low power applications [2-5].
Keywords :
CMOS integrated circuits; DC-DC power convertors; digital integrated circuits; energy conservation; power consumption; radiofrequency power transmission; switched capacitor networks; switching convertors; SCPC; battery-less operation; bulk CMOS; digital circuit energy efficiency improvement; digital circuit supply voltage reduction; dynamic power consumption minimization; fully integrated switched capacitor DC-DC power converter; integrated buck converter; linear regulator; wireless power transmission system; Capacitance; Capacitors; DC-DC power converters; MOS capacitors; Switches; System-on-chip; Voltage measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid- State Circuits Conference - (ISSCC), 2015 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4799-6223-5
Type :
conf
DOI :
10.1109/ISSCC.2015.7063078
Filename :
7063078
Link To Document :
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