0.5-V input digital LDO with 98.7% current efficiency and 2.7-µA quiescent current in 65nm CMOS

Research output: Contribution to book/Conference proceedings/Anthology/Report › Conference contribution › Contributed › peer-review

Contributors

  • Yasuyuki Okuma - , Semiconductor Technology Academic Research Center (STARC) (Author)
  • Koichi Ishida - , Chair of Circuit Design and Network Theory, Tokyo University of Agriculture (Author)
  • Yoshikatsu Ryu - , Semiconductor Technology Academic Research Center (STARC) (Author)
  • Xin Zhang - , Chair of Physical Chemistry, Tokyo University of Agriculture (Author)
  • Po-Hung Chen - , Tokyo University of Agriculture (Author)
  • Kazunori Watanabe - , Semiconductor Technology Academic Research Center (STARC) (Author)
  • Makoto Takamiya - , Tokyo University of Agriculture (Author)
  • Takayasu Sakurai - , Tokyo University of Agriculture (Author)

Abstract

Digital LDO is proposed to provide the low noise and tunable power supply voltage to the 0.5-V near-threshold logic circuits. Because the conventional LDO feedback-controlled by the operational amplifier fail to operate at 0.5V, the digital LDO eliminates all analog circuits and is controlled by digital circuits, which enables the 0.5-V operation. The developed digital LDO in 65nm CMOS achieved the 0.5-V input voltage and 0.45-V output voltage with 98.7% current efficiency and 2.7-μA quiescent current at 200-μA load current. Both the input voltage and the quiescent current are the lowest values in the published LDO's, which indicates the good energy efficiency of the digital LDO at 0.5-V operation.

Details

Original languageEnglish
Title of host publicationIEEE Custom Integrated Circuits Conference 2010
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-4
Number of pages4
ISBN (print)978-1-4244-5759-5
Publication statusPublished - 22 Sept 2010
Peer-reviewedYes

Conference

TitleIEEE Custom Integrated Circuits Conference 2010
Duration19 - 22 September 2010
LocationSan Jose, CA, USA

External IDs

Scopus 78649818058
ORCID /0000-0002-4152-1203/work/165453406

Keywords

Sustainable Development Goals

Keywords

  • Clocks, Switches, Shift registers, CMOS integrated circuits, Bidirectional control, Transient analysis, Current measurement