• DocumentCode
    11342
  • Title

    90% High Efficiency and 100-W/cm ^{bm 3} High Power Density Integrated DC - DC Converter for Cellular Phones

  • Author

    Sugahara, S. ; Yamada, Koji ; Edo, Masaharu ; Sato, Takao ; Yamasawa, Kiyohito

  • Author_Institution
    Fuji Electric Company, Ltd., Nagano, Japan
  • Volume
    28
  • Issue
    4
  • fYear
    2013
  • fDate
    Apr-13
  • Firstpage
    1994
  • Lastpage
    2004
  • Abstract
    This paper describes a small-size buck-type dc–dc converter for cellular phones. Output power MOSFETs and control circuitry are monolithically integrated. The newly developed pulse frequency modulation control integrated circuit, mounted on a planar inductor within the converter package, has a low quiescent current below 10 μA and a small chip size of 1.4 mm × 1.1 mm in a 0.35-μm CMOS process. The converter achieves a maximum efficiency of 90% and a power density above 100 W/cm ^3 .
  • Keywords
    Capacitors; Delay; Inductors; Integrated circuits; MOSFETs; Switching frequency; Current consumption reduction; dc–dc converter; efficiency; miniaturization; negative current prevention; power density; pulse frequency modulation (PFM); thin inductor;
  • fLanguage
    English
  • Journal_Title
    Power Electronics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0885-8993
  • Type

    jour

  • DOI
    10.1109/TPEL.2012.2197762
  • Filename
    6195026
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=11342