All-in-one package ultracompact micropower module using thin-film inductor

Fumihiro Sato, Toshiaki Ono, Naoki Wako, Satoru Arai, Tomomichi Ichinose, Yoshiaki Oba, Sunao Kanno, Eishu Sugawara, Masahiro Yamaguchi, Hidetoshi Matsuki

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Innovative developments for portable electronics devices, typically cellular telephone handsets and the like, have been carried out at a rapid pace, in aim to produce increasingly compact and highly functional mobile devices. Power supply voltage values range widely in electronic circuits and LSI which are built-in in these devices, and for this voltage conversion, it is vital to use a small-sized, high-efficiency switching system, dc-dc converter. This paper describes an ultralow-profile micro dc-dc converter module with thickness 1.3 mm, the world's first single package of inductor, capacitor, and control IC as an ultracompact, high-efficiency voltage converter. The key device that led to realization of this small power supply is a thin-film inductor employing thin-film magnetic core.

Original languageEnglish
Pages (from-to)2029-2031
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number4 II
Publication statusPublished - 2004 Jul


  • All-in-one package
  • Film inductor
  • Microinductor
  • Ultralow profile
  • dc-dc converter


Dive into the research topics of 'All-in-one package ultracompact micropower module using thin-film inductor'. Together they form a unique fingerprint.

Cite this