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:
Mar. 09, 2004
Filed:
Jul. 08, 2002
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A composite loop compensation circuit and method for a low drop-out regulator configured to facilitate stable operation at very low output load currents is provided. An exemplary low drop-out regulator includes an error amplifier, a pass device, and a composite loop compensation circuit. The compensation loop compensation circuit includes a plurality of segmented sense devices, a plurality of switches and a biasing component. The plurality of segmented sense devices are configured to sense an output load current, i.e., the current from the output terminal of the pass device. The plurality of switches are coupled between the plurality of segmented sense devices and a biasing component. Composite loop compensation circuit is configured to adjust the dominant first pole of the composite feedback loop based on the output load current through biasing of the active resistor component. As a result, the low drop-out regulator can include a very large pass device form addressing high currents and can remain stable for extremely low currents.