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. 28, 2024
Filed:
Sep. 04, 2020
SG Micro Corp, Beijing, CN;
Yu Lin, Beijing, CN;
SG MICRO CORP, Beijing, CN;
Abstract
Disclosed is a low dropout linear regulator including a power transistor and an error amplifier having a first input stage, a second input stage and a control circuit. The first input stage includes a first pair of transistors receiving an output voltage and a reference voltage, the second input stage includes a second pair of transistors receiving the output voltage and the reference voltage, the first and second pairs of transistors have different conductivity types. The control circuit controls turn-on and turn-off states of the first input stage according to the reference voltage, and turns on the first input stage when the reference voltage is less than a preset threshold, so that the error amplifier operates normally and the output voltage changes smoothly. When the reference voltage is greater than the preset threshold, the control circuit turns off the first input stage so that only the second input stage operates.