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:
Jul. 26, 2022
Filed:
Nov. 19, 2020
Apple Inc., Cupertino, CA (US);
Sujan K. Manohar, Austin, TX (US);
Jay B. Fletcher, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A dropout detection circuit for an LDO voltage regulator is disclosed. An LDO voltage regulator includes a power transistor having a drain terminal coupled to an output voltage node and a gate terminal coupled to an output of an error amplifier. A source terminal of the power transistor is coupled to an input voltage node. The circuit further includes a detection circuit having a first input coupled to the gate terminal and a second input coupled to the drain terminal. The detection circuit is configured to generate an indication responsive to detecting that the LDO voltage regulator has entered operation below a minimum dropout.