Integrated circuit with modulable low dropout voltage regulator

Details Integrated circuit with modulable low dropout voltage regulator Integrated circuit with modulable low dropout voltage regulator

2007-05-15

2007-05-15

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S273000, C323S280000

Reexamination Certificate

active

11179782

ABSTRACT:
A low dropout voltage (LDO) regulator comprises an output stage (EtS) of the amplifier (AMP), which has a main output and n auxiliary outputs which can respectively deliver a main control voltage (VGPRINC) and n auxiliary control voltages (VG1, . . . , VGn); and a power stage (EtP) which has a main power transistor (PmosPrinc), controlled at its gate by the main control voltage (VGPRINC), and p power modules (module1, . . . , module n) of identical layout with p less than or equal to n, respectively having p auxiliary power transistors (PMos1, . . . , PMosn) each controlled at their gate by p auxiliary control voltages (VG1, . . . , VGn). The number p is selected as a function of an intended maximum output current.

REFERENCES:
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patent: 6518737 (2003-02-01), Stanescu et al.
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patent: 6703816 (2004-03-01), Biagi et al.
patent: 6765374 (2004-07-01), Yang et al.
patent: 2003/0178978 (2003-09-01), Biagi et al.
patent: 0 403 942 (1990-12-01), None
patent: 1 061 428 (2000-12-01), None
French Preliminary Search Report dated Mar. 2, 2005 for French Application No. 04 07853.

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