The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 2011
Filed:
Oct. 26, 2010
Tomoaki Uno, Takasaki, JP;
Masaki Shiraishi, Hitachi, JP;
Nobuyoshi Matsuura, Takasaki, JP;
Toshio Nagasawa, Takasaki, JP;
Tomoaki Uno, Takasaki, JP;
Masaki Shiraishi, Hitachi, JP;
Nobuyoshi Matsuura, Takasaki, JP;
Toshio Nagasawa, Takasaki, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A non-insulated DC-DC converter has a power MOS-FET for a highside switch and a power MOS-FET for a lowside switch. In the non-insulated DC-DC converter, the power MOS-FET for the highside switch and the power MOS-FET for the lowside switch, driver circuits that control operations of these elements, respectively, and a Schottky barrier diode connected in parallel with the power MOS-FET for the lowside switch are respectively formed in four different semiconductor chips. These four semiconductor chips are housed in one package. The semiconductor chips are mounted over the same die pad. The semiconductor chips are disposed so as to approach each other.