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. 10, 2012
Filed:
Nov. 03, 2009
Jue Wang, Hillsborough, NJ (US);
Jue Wang, Hillsborough, NJ (US);
Intersil America Inc., Milpitas, CA (US);
Abstract
An apparatus comprises a voltage regulator including an high side switching transistor and a low side switching transistor. An high side drive controls operation of the high side switching transistor. A low side driver controls operation of the low side switching transistor. A bootstrap capacitor provides an operating voltage to the high side switching driver. The bootstrap capacitor is charged to a predetermined level responsive to a supply voltage. A low side driver drives the low side switching transistor according to a process that charges the bootstrap capacitor to the predetermined level. The process turns on the low side switching transistor for a first predetermined number of cycles and turns off the low side switching transistor for a second predetermined number of cycles. The process is repeated for a predetermined number of times during startup of the voltage regulator when a prebias load is applied to the voltage regulator.