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:
Oct. 29, 2002
Filed:
Apr. 27, 2001
Pierre Andre Genest, Rouffiac Tolosan, FR;
Joel Turchi, Toulouse, FR;
Semiconductor Components Industries LLC, Phoenix, AZ (US);
Abstract
Voltage regulator ( ) provides current sense comparator ( ) to detect the normal and standby modes of operation for voltage regulator ( ). During a normal mode of operation, current sense comparator ( ) de-asserts signal (MODE), causing voltage regulator ( ) to regulate the output voltage to a predetermined level. Once the current (I ) has diminished below a predetermined value, current sense comparator ( ) asserts signal (MODE) to indicate a standby mode. During the standby mode, regulator ( ) regulates the output voltage (V ) between first and second reference levels, requiring a quiescent current level much less than the quiescent current level required during normal mode, due to the deactivation of current sense comparator ( ) and error amplifier ( ) during standby mode. An alternate method of quiescent current reduction uses switched voltage reference ( ). Bandgap reference ( ) supplies voltage reference (V ) during normal mode of operation and depletion MOS reference supplies voltage reference (V ) during standby mode of operation.