Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Multiple-Voltage Single-Output DC/DC Up/Down Converter

UP/DOWN 변환이 동시에 지원되는 다중 전압 단일 출력 DC/DC 변환기

  • 조상익 (서경대학교 컴퓨터공학과) ;
  • 김정열 (서경대학교 컴퓨터공학과) ;
  • 임신일 (서경대학교 컴퓨터공학과) ;
  • 민병기 (크로스 반도체 기술(주))
  • Published : 2002.06.01
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Abstract

This paper describes a design of multiple-mode single-output DC/DC converter which can be used in both up and down conversion. Proposed up/down converter does not produce a negative voltage which is generated in conventional buck-boost type converter. Three types of operation mode(up/down/bypass) are controlled by the input voltage sense and command signals of target output voltage. PFM(pulse frequency modulation) control is adopted and modified for fast tracking and for precise output voltage level with an aid of output voltage sense. Designed DC/DC converter has the performance of less than 5 % ripple and higher than 80 % efficiency. Chip area is 3.50 mm ${\times}$ 2.05 mm with standard 0.35 $\mu\textrm{m}$ CMOS technology.

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