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:
Apr. 07, 2020
Filed:
Sep. 13, 2018
Applicant:
Rohm Co., Ltd., Kyoto-shi, Kyoto, JP;
Inventors:
Makoto Yasusaka, Kyoto, JP;
Hiroki Inoue, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/575 (2006.01); G05F 1/46 (2006.01); G05F 3/26 (2006.01);
U.S. Cl.
CPC ...
G05F 1/575 (2013.01); G05F 1/461 (2013.01); G05F 3/262 (2013.01);
Abstract
A regulator circuit supplies an output voltage Vto a load. A second transistor is arranged in parallel with a first transistor, and has a relatively small size. A feedback circuit generates a first feedback signal and a second feedback signal according to the output voltage V. A first error amplifier controls the first transistor such that the first feedback signal approaches a first reference value. A second error amplifier controls the second transistor such that the second feedback signal approaches a second reference value. In a light-load state, the operation of the first error amplifier is maintained.