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:
Nov. 10, 2020
Filed:
Jul. 11, 2019
Qorvo Us, Inc., Greensboro, NC (US);
Bruce John Tesch, Melbourne, FL (US);
Qorvo US, Inc., Greensboro, NC (US);
Abstract
A low drop-out (LDO) voltage regulator employs combined compensation methods for reduced capacitor area. Frequency compensation internal to a LDO voltage regulator is accomplished by introducing a metal-insulator-metal (MIM) compensation capacitor in series with a compensation resistor between an input to a second stage of the LDO voltage regulator and a regulator output. This achieves a good settling response over a wide range of load conditions at the expense of relatively large capacitor area. Alternatively, a metal-oxide semiconductor (MOS) compensation capacitor may be coupled between an intermediate node of a cascode circuit in a first stage of the LDO voltage regulator and the regulator output. This requires less capacitor area but exhibits instability at some corners. In combination, a good settling response over all corners may be achieved with stacked MIM/MOS capacitors occupying significantly less area than the MIM capacitor of the first method alone.