Electronic switching regulator circuit for producing a reference voltage variable with temperature

The invention relates to a switching regulator circuit (10) producing a varying reference voltage (Vr) with temperature, which circuit includes a band-gap generator (2) for supplying at a power stage through an error amplifier (4) and a comparator (5). To the error amplifier (4) is also applied a regulated voltage (Vs) which may be produced by the regulator itself. Advantageously, the regulator (10) comprises a plurality of band-gap generators (12) being all supplied by the regulated voltage (Vs) and input a fraction of the regulated voltage (Vs) through a voltage divider (6), the respective outputs of the band-gap generators (12) being connected to a logic network (11) which has an output connected to the power stage. The error amplifier and comparator are incorporated to each of the generators (12).