Single inductor quad output switching converter with priority-scheduled program for fast transient and unlimited-load range in 40nm CMOS technology

Wei Chung Chen*, Tzu Chi Huang, Tsu Wei Tsai, Ruei Hong Peng, Kuei Liang Lin, Ke-Horng Chen, Ying Hsi Lin, Tsung Yen Tsai, Chen Chih Huang, Chao Cheng Lee, Li Ren Huang, Chao Jen Huang, Chung-Chih Hung, Chin Long Wey, Hsin Yu Luo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

System-on-a-chip (SoC) applications need multiple power supplies with low noise for analog circuits and high efficiency for digital circuits. Thus, this paper proposes the priority-scheduled program (PSP) for single inductor quad output (SIQO) switching converter to manage energy delivery for four outputs. Consequently, SIQO converter with PSP can provides fast transient response and reduce cross-regulation. Besides, the level bypass detector (LBD) provides unlimited load range between each output through the shared inductor. The PSP cooperates with the LDB to transfer energy to low priority outputs to avoid overshoot at high priority outputs. With the two low-dropout regulator (LDR) working as buffers at low priority outputs, voltage disturbance can be filtered out. The SIQO converter fabricated in 40nm CMOS technology satisfies power requirements in portable electronics with 0.2% low noise, 15μs fast transient response, and cross-regulation smaller than 30mV.

Original languageEnglish
Title of host publicationESSCIRC 2014 - Proceedings of the 40th European Solid-State Circuit Conference
EditorsGaudenzio Meneghesso, Pietro Andreani, Andrea Bevilacqua
PublisherIEEE Computer Society
Pages167-170
Number of pages4
ISBN (Electronic)9781479956944
DOIs
StatePublished - 31 Oct 2014
Event40th European Solid-State Circuit Conference, ESSCIRC 2014 - Venezia Lido, Italy
Duration: 22 Sep 201426 Sep 2014

Publication series

NameEuropean Solid-State Circuits Conference
ISSN (Print)1930-8833

Conference

Conference40th European Solid-State Circuit Conference, ESSCIRC 2014
CountryItaly
CityVenezia Lido
Period22/09/1426/09/14

Keywords

  • Single inductor quad output (SIQO)
  • cross-regulation
  • fast transient
  • level bypass detector (LBD)
  • priority scheduled program (PSP)

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