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:
Sep. 10, 2013
Filed:
Mar. 01, 2011
Ikuo Fukami, Kanagawa, JP;
Masaji Nakano, Kanagawa, JP;
Ikuo Fukami, Kanagawa, JP;
Masaji Nakano, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A semiconductor device of the present invention includes an output transistor connected between a power supply terminal and an output terminal; a detection transistor generating a detection current that is proportional to a current flowing through the output transistor; a detection voltage generation unit generating a detection voltage based on a detection current; a protection transistor drawing a current from a control terminal of the output transistor to the output terminal according to the detection voltage; and a limited current generation circuit that generates a limited current that is obtained by converting a limit setting current that sets a current flowing through the output transistor in a protection state according to a variation of a threshold voltage of the protection transistor and a variation of the detection voltage with respect to the detection current, and supplies the limited current to a first terminal of the protection transistor.