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. 21, 2010
Filed:
Apr. 22, 2008
Richard Hull, Puyallup, WA (US);
Vivien Delport, Chandler, AZ (US);
Zacharias Marthinus Smit, Chandler, AZ (US);
Sean Steedman, Phoenix, AZ (US);
Jerrold S. Zdenek, Maricopa, AZ (US);
Michael Charles, Gilbert, AZ (US);
Ruan Lourens, Austin, TX (US);
Richard Hull, Puyallup, WA (US);
Vivien Delport, Chandler, AZ (US);
Zacharias Marthinus Smit, Chandler, AZ (US);
Sean Steedman, Phoenix, AZ (US);
Jerrold S. Zdenek, Maricopa, AZ (US);
Michael Charles, Gilbert, AZ (US);
Ruan Lourens, Austin, TX (US);
Microchip Technology Incorporated, Chandler, AZ (US);
Abstract
An integrated circuit device provides a choice of external pins (connections) that may be user selectable for coupling an external filter/stabilization capacitor to an internal voltage regulator. However, connecting the output of a internal voltage regulator to an uncharged external filter/stabilization capacitor (or to a capacitor charged to a different voltage level than the internal regulation voltage) through a low impedance path can cause the regulator output voltage to sag/spike if the internal voltage regulator tries to charge/discharge the capacitor up/down to equilibrium with the regulator output voltage. To minimize this potential sag/spike, the voltage on the external filter/stabilization capacitor may be adjusted in a controlled manner to substantially the same voltage as the voltage on the output of the internal voltage regulator, and then the internal voltage regulator is operationally coupled through a low impedance to the external regulator filter/stabilization capacitor.