Current-mode DC-DC buck converter with reliable hysteretic-mode control and dual modulator for fast dynamic voltage scaling

Jungmoon Kim, Hyunho Chu, Chulwoo Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


This paper describes an integrated current-mode buck converter with reliable hysteretic mode controller and modulators for fast dynamic voltage scaling (DVS). The proposed mode controller and modulators enable the DC-DC buck converter to perform its smooth mode transitions at optimal points. The continuous current-limiting and DCM controls drive the DVS to track the reference at the maximum speed in both PWM and PFM modes. The DC-DC buck converter is implemented in a 90-nm 3.3V CMOS process. The maximum efficiency reaches 94.5%. The hysteretic mode controller keeps its efficiency always at more than 75% for any load conditions. During a mode transition, the output voltage has no overshoots, and it can track the reference voltage instantly.

Original languageEnglish
Title of host publicationMidwest Symposium on Circuits and Systems
Number of pages4
Publication statusPublished - 2009 Dec 1
Event2009 52nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS '09 - Cancun, Mexico
Duration: 2009 Aug 22009 Aug 5


Other2009 52nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS '09


ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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