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:
Sep. 04, 2018
Filed:
Nov. 07, 2016
Realtek Semiconductor Corp., Hsinchu, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
A low dropout regulator includes a PMOS power transistor, a feedback network, an error amplifier and an active enhanced PSRR unit. The PMOS power transistor has a first end coupled to an input voltage, and a second end coupled to a load and the feedback network. The error amplifier receives a feedback signal generated from the feedback network, compares the feedback signal with a reference voltage to generate a difference value, and amplifies the difference value to generate an error signal. The active enhanced PSRR unit has one end coupled to the first end, and another end coupled to a control end of the PMOS power transistor and the error amplifier, detects an input voltage of the first end, and correspondingly adjusts a voltage of the control end to stabilize a voltage between the control end and the first end according to a variation of the input voltage.