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:
Feb. 18, 2014
Filed:
Jun. 02, 2010
Takatsugu Wachi, Kyoto, JP;
Masashi Nagasato, Kyoto, JP;
Yuki Iwata, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
The step-up DC/DC converter () of the present invention has a synchronous rectifier transistor (M); an output transistor (M); a first back-gate control transistor (M) connected between an external terminal (T) and a back gate of the synchronous rectifier transistor (M); a discharge transistor (M) connected between the external terminal (T) and a ground terminal; and a control unit (X) for controlling the on/off state of the components described above. The control unit (X) switches off the first back-gate control transistor (M) and switches on the discharge transistor (M) when stopping the switching operation of the output transistor (M) and the synchronous rectifier transistor (M).