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. 20, 2025
Filed:
Dec. 28, 2022
Industry-university Cooperation Foundation Hanyang University Erica Campus, Ansan-si, KR;
Abstract
Disclosed herein is a low dropout (LDO) voltage regulator including an amplifier configured to receive a reference voltage through a negative input terminal, receive a feedback voltage through a positive input terminal, and amplify a difference between the feedback voltage and the reference voltage; a buffer which has an input connected to an output of the amplifier and an output and performs a buffering operation; a pass transistor configured to generate a driving current according to an output signal of the buffer; a voltage divider configured to form an output signal according to the driving current and generate a feedback voltage through a feedback resistor connected thereto; and a negative resistor circuit connected between the reference voltage and the feedback resistor and configured to generate a compensation current compensating for a loss current generated in the feedback resistor. In accordance with the present invention, the LDO voltage regulator, which greatly improves load regulation with a wide bandwidth by increasing a gain without increasing a size and current consumption of a transistor inside an amplifier, can be provided.