Bias-starving circuit with precision monitoring loop for voltage regulators with enhanced stability

摘要

A regulator circuit includes a voltage regulator having a stability control input and an output for providing a regulated output voltage, an amplifier circuit having an input for receiving an error voltage of the voltage regulator, and an output, and a control circuit having an input coupled to the output of the amplifier and an output coupled to the stability control input of the voltage regulator, such that the regulator stability is maximized while the error voltage is minimized. The voltage regulator includes an LDO voltage regulator, the amplifier circuit includes an operational amplifier circuit, and the control circuit includes a load-sensing or load-replicating circuit.