Supply voltage regulation with temperature scaling

A method of regulating a supply voltage of an integrated circuit based on temperature, comprising:

• coupling a scaling resistor between a feedback node and a power grid of the integrated circuit;
• comparing a voltage of the feedback node with a reference voltage and providing a control voltage;
• developing the supply voltage based on the control voltage and providing the supply voltage to the power grid;
• sensing a temperature of the integrated circuit;
• providing a bias current based on the temperature to the scaling resistor via the feedback node;
• converting a voltage between a hot point of a ground grid of the integrated circuit and a ground input of the integrated circuit to a bias current;
• and
• applying the bias current to the scaling resistor via the feedback node.

A supply voltage regulation system, comprising:

• an integrated circuit having a ground pad coupled to a ground grid incorporated on said integrated circuit and a having a power pad coupled to a power grid incorporated on said integrated circuit;
• a temperature sensor provided on said integrated circuit that provides a temperature sense signal indicative of a die temperature of said integrated circuit;
• a scaling resistor having a first end coupled to said power grid and having a second end coupled to a feedback node;
• a voltage regulator amplifier having a first input receiving a reference voltage, having a second input coupled to said feedback node, and having an output for driving a supply voltage to said power pad of said integrated circuit;
• and
• a temperature scaling circuit having an input receiving said temperature sense signal and having an output coupled to said feedback node, wherein said temperature scaling circuit drives a scaling current to said scaling resistor via said feedback node to adjust said supply voltage based on said temperature sense signal, wherein said temperature scaling circuit comprises:
• a current source having an output providing a bias current;
• a switch having a first current terminal coupled to an output of said current source, having a second current terminal coupled to said feedback node, and having a control input;
• and
• a comparator having a first input receiving said temperature sense signal having a second input receiving a temperature threshold, and having an output coupled to a control input of said switch.

A method of regulating a supply voltage of an integrated circuit based on temperature, comprising:

• coupling a scaling resistor between a feedback node and a power grid of the integrated circuit;
• comparing a voltage of the feedback node with a reference voltage and providing a control voltage;
• developing the supply voltage based on the control voltage and providing the supply voltage to the power grid;
• sensing a temperature of the integrated circuit;
• and
• providing a bias current based on the temperature to the scaling resistor via the feedback node, comprising:
• comparing the temperature with a predetermined temperature threshold;
• and
• applying the bias current to the feedback node when the temperature reaches the predetermined temperature threshold.