circuit regulator with soft start and start-up procedure, power system corresponding

摘要

A track regulator circuit includes an input terminal for receiving an input signal, an output stage with an output terminal for applying an output signal to a load, an error amplifier coupled to the input terminal, and a feedback resistor between the output terminal and the error amplifier for transferring to the error amplifier a feedback signal indicative of the output signal. The error amplifier is configured for driving the output stage as a function of the difference between the input signal and the output signal so that the output signal tracks the input signal. The circuit includes a current generator coupled to the feedback resistor for injecting into the feedback resistor a soft-start current to unbalance the error amplifier, with the intensity of the soft-start current gradually ramping down to zero.