(19)
(11) EP 1 186 983 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.11.2003 Bulletin 2003/46

(43) Date of publication A2:
13.03.2002 Bulletin 2002/11

(21) Application number: 01120556.4

(22) Date of filing: 29.08.2001
(51) International Patent Classification (IPC)7: H02M 3/156, G05F 1/565
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 31.08.2000 EP 00830594

(71) Applicant: STMicroelectronics S.r.l.
20041 Agrate Brianza (Milano) (IT)

(72) Inventors:
  • Cocetta, Franco
    33040 Premariacco (Udine) (IT)
  • Rossi Giorgio
    20014 Nerviano (IT)

(74) Representative: Botti, Mario 
Botti & Ferrari S.r.l., Via Locatelli, 5
20124 Milano
20124 Milano (IT)

   


(54) Switching type bandgap controller


(57) The invention relates to an integrated self-powered and switching electronic circuit (10) for regulating a stable reference voltage (Vr), comprising a band-gap voltage generator to produce said stable reference voltage (Vr) for a system circuit block (2, 12) that is generally supplied by the output of the band-gap generator through a comparator and an error amplifier. A regulating loop is provided between the output of the system block (12) and the input of the voltage generator circuit (10) to supply a voltage signal (SENSE) produced by the output of the system block. Advantageously, the voltage generator circuit incorporates both the comparator and the error amplifier.






Search report