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. 28, 2020
Filed:
Oct. 10, 2018
Applicant:
Ablic Inc., Chiba-shi, Chiba, JP;
Inventors:
Tsutomu Tomioka, Chiba, JP;
Masakazu Sugiura, Chiba, JP;
Assignee:
ABLIC INC., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 1/08 (2006.01); H02M 3/156 (2006.01); G05F 1/10 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 1/08 (2013.01); G05F 1/10 (2013.01); H02M 3/156 (2013.01); H02M 2001/0003 (2013.01);
Abstract
A source-grounded amplifier circuit supplied with a signal of an error amplifier circuit, and an output transistor supplied with a control voltage of the source-grounded amplifier circuit are provided. The source-grounded amplifier circuit has, in a signal path, a current limiting circuit including a cascode circuit controlled by a voltage having a positive temperature coefficient. A voltage regulator capable of reducing a dropout voltage of an output voltage without exceeding a gate breakdown voltage of the output transistor is provided.