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:
Apr. 17, 2012
Filed:
Nov. 02, 2009
Vadim V. Ivanov, Tucson, AZ (US);
Keith E. Kunz, Bryan, TX (US);
Vadim V. Ivanov, Tucson, AZ (US);
Keith E. Kunz, Bryan, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An LDO regulator () produces an output voltage (Vout) by applying the output voltage to a feedback input () of a differential input stage (A) and applying an output () of the differential input stage to a gate of a first follower transistor (MP) having a source coupled to an input () of a class AB output stage (C) which generates the output voltage. Demanded load current is supplied by the output voltage during a dip in its value to a gate of a second follower transistor (MP) having a gate coupled to the output of the input stage to decrease current in a current mirror (MN) having an output coupled to a current source (I) and a gate of an amplifying transistor (MN). This causes the current source to rapidly turn on the amplifying transistor to cause it to rapidly turn on a cascode transistor (MN), causing it to turn on a pass transistor (MP) of the output stage.