Patent ID: 8199531

Claim:
A voltage converter, comprising: a voltage-transformer having a primary side, designed to receive an input voltage, and a secondary side, designed to supply an output voltage; a control-switch coupled to said primary side; and a control circuit, coupled to a control terminal of said control-switch and configured to control switching thereof as a function of a first signal correlated to said output voltage; said control circuit including an error-amplifier stage, configured to process a difference between said first signal and a reference signal, wherein said error-amplifier stage is configured so as to have a transconductance characteristic with a linear-operation region, having a given slope, and at least one first clamped region, which has a slope lower than said given slope and is contiguous to said linear-operation region; wherein said first clamped region has a slope that is approximately zero and corresponds to an approximately constant value of an output current from said error-amplifier stage, as a voltage at input to said error-amplifier stage varies.