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:
Jul. 21, 2015
Filed:
Dec. 17, 2007
Neil Hendin, Mountain View, CA (US);
Zahid Najam, San Jose, CA (US);
Neil Hendin, Mountain View, CA (US);
Zahid Najam, San Jose, CA (US);
NVIDIA CORPORATION, Santa Clara, CA (US);
Abstract
A power management unit for improving power efficiency of an electronic device. The power management unit includes a first and a second stage power regulator and a control circuitry. The first stage power regulator includes a switching regulator to efficiently adjust an input voltage based on a feedback signal. The adjusted input voltage provides the second stage power regulator that includes low dropout voltage regulators with an input voltage close to its output. Thus, power dissipation in the second stage is reduced by reducing the voltage differential between the input and desired output voltages. The second stage turns on/off power to units of the electronic device. The control circuitry generates the feedback signal based on dropout voltages of the low dropout voltages, the desired output voltage and the adjusted input voltage. The largest dropout voltage is selected and adds it to the desired output voltage to generate the feedback signal.