A voltage regulator includes a supply filter, a bias filter, and first and second circuits. The supply filter is configured to operate from a supply voltage, and to generate a filtered supply voltage at a first node. The supply filter includes a transistor and a capacitor. First and control terminals of the transistor receive the supply voltage. A second terminal of the transistor and a first terminal of the capacitor are connected to the first node. The first circuit is configured to operate from both the supply voltage and the filtered supply voltage, and to generate a second reference voltage based on an input reference voltage. The bias filter is configured to generate a filtered second reference voltage based on the second reference voltage. The second circuit is configured to operate from the filtered supply voltage, and to generate a regulated voltage based on the filtered second reference voltage.