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:
May. 01, 2012
Filed:
Feb. 25, 2009
Applicant:
Tun-shih Chen, Pingtung County, TW;
Inventor:
Tun-Shih Chen, Pingtung County, TW;
Assignee:
Mediatek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
Low dropout regulators capable of preventing damage caused by a short circuit or a heavy load are provided, in which a pass transistor receives an unregulated power supply voltage to generate a regulated output voltage according to a control signal. Additionally, a constant overcurrent limiting circuit limits an output current through the pass transistor to below a predetermined current, and a foldback overcurrent limiting circuit enables the constant overcurrent limiting circuit to further decrease the output current, when the regulated output voltage is lower than a predetermined voltage.