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:
Aug. 26, 2025
Filed:
Sep. 04, 2020
Applicant:
SG Micro Corp, Beijing, CN;
Inventor:
Lidi Zhang, Beijing, CN;
Assignee:
SG MICRO CORP, Beijing, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/575 (2006.01); G05F 1/46 (2006.01); G05F 1/563 (2006.01); G05F 3/26 (2006.01);
U.S. Cl.
CPC ...
G05F 1/575 (2013.01); G05F 1/461 (2013.01); G05F 1/563 (2013.01); G05F 3/262 (2013.01);
Abstract
Disclosed is a low dropout linear voltage regulator and a control circuit thereof. The control circuit includes an error amplifier and a backflow prevention circuit, which compares an input voltage with an output voltage, to switch a substrate voltage and a voltage at a control terminal of the power transistor to a higher one of the input voltage and the output voltage, thus the power transistor and its parasitic diode can be turned off in time when the output voltage is greater than the input voltage, so as to prevent the power transistor from being damaged by current backflow and improve reliability of the low dropout linear regulator.