Design of a CMOS DC-to-DC Converter for Portable Devices

휴대용 기기를 위한 CMOS DC-DC 변환기 설계

  • O, N.G. (Dept. of Electronics Engineering, University of Incheon) ;
  • Lee, J.K. (Dept. of Electronics Engineering, University of Incheon) ;
  • Cho, I.H. (Dept. of Electronics Engineering, University of Incheon) ;
  • Jang, S.H. (Dept. of Electronics Engineering, University of Incheon) ;
  • Cha, C.H. (Dept. of Electronics Engineering, University of Incheon) ;
  • Yu, C.G. (Dept. of Electronics Engineering, University of Incheon)
  • 오남걸 (인천대학교 전자공학과) ;
  • 이재경 (인천대학교 전자공학과) ;
  • 조인형 (인천대학교 전자공학과) ;
  • 장수훈 (인천대학교 전자공학과) ;
  • 차충현 (인천대학교 전자공학과) ;
  • 유종근 (인천대학교 전자공학과)
  • Published : 2008.10.31

Abstract

This paper describes a low voltage, low-power CMOS buck DC/DC converter, which has a simple common-gate current sensing circuit. It consumes low power because it includes less transistors than other converters which use operational amplifiers for current sensing. The designed DC-DC converter is fabricated in a 0.18um CMOS technology. A maximum efficiency of 88% has been obtained with the proposed circuit. It has $2V{\sim}3.7V$ input voltage range, $1V{\sim}2.5V$ output voltage range and maximum output current of 1000mA.

Keywords