Tunable voltage regulator circuit

A method of regulating a voltage by a voltage regulator comprising:

• an output terminal;
• an output driver current mirror circuit comprising an output driver transistor and a diode-connected transistor with a tunable resistance circuit coupled therebetween;
• and a first control circuit being a low power control circuit and comprising a first comparator,
• the method comprising:
• providing, by the output driver transistor, an output voltage to the output terminal;
• controlling, by the first comparator, a first current to the output driver current mirror circuit in response to a first feedback signal from the output terminal;
• controlling, by a second comparator comprised in a second control circuit being a high power control circuit, a second current to the output driver current mirror circuit in response to a second feedback signal from the output terminal;
• and
• providing by the tunable resistance circuit, a variable resistance to control an electrode of the output driver transistor in response to a control signal, thereby providing di/dt control for the output voltage.

A voltage regulator comprising:

• an output terminal;
• an output driver current mirror circuit comprising an output driver transistor and a diode-connected transistor with a tunable resistance circuit coupled therebetween, the output driver transistor coupled to provide an output voltage to the output terminal;
• and
• a first control circuit comprising a first comparator, the first comparator for controlling a first current to the output driver current mirror circuit in response to a first feedback signal from the output terminal.

A voltage regulator comprising:

• an output driver transistor having a first current electrode coupled to a first power supply voltage terminal, a control electrode, and a second current electrode coupled to an output terminal;
• a tunable resistance having a first terminal coupled to the control terminal of the output driver transistor, a second terminal, and a control terminal for receiving a control signal;
• a first transistor having a first current electrode coupled to the first power supply voltage terminal, a control electrode, and a second current electrode coupled to the second terminal of the tunable resistance;
• a second transistor having a first current electrode coupled to the second current electrode of the first transistor, a control electrode, and a second current electrode;
• and
• a first comparator having a first input for receiving a first reference voltage, a second input coupled to the output terminal for receiving a first feedback signal, and an output coupled to the control electrode of the second transistor.