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. 24, 2001
Filed:
Jun. 16, 2000
Giovanni Cali′, Catania, IT;
Mario Paparo, S. Giovanni la Punta, IT;
Roberto Pelleriti, Catania, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
Presented is a low-drop type of voltage regulator formed with BiCMOS/CMOS technology. The regulator includes an input terminal that receives a stable voltage reference connected to one input of an operational amplifier through a switch controlled by a power-on enable signal. A supply voltage reference powers the operational amplifier. The regulator includes an output transistor connected to an output of the amplifier to generate a regulated voltage value to be fed back to the amplifier input. A second transistor is connected in series between the output transistor and the supply voltage reference. The regulator uses a control circuit portion connected between the control terminal of the second transistor and the supply voltage reference to prevent the breakdown of the output transistor from occurring.