METHOD AND APPARATUS FOR OPTIMIZING LINEAR REGULATOR TRANSIENT PERFORMANCE
First Claim
1. A voltage regulator compensation circuit configured to provide power to a dynamic load, the compensation circuit comprising:
- a power transistor configured to drive the dynamic load;
a reference determining transistor configured to establish a voltage reference proportional to a regulated output voltage of the power transistor;
a control circuit coupled to a control input of the power transistor and coupled to a control input of the reference determining transistor;
a comparison engine configured to compare the regulated output voltage and the voltage reference;
a current consuming transistor operatively coupled to an output of the power transistor and configured to provide a varying secondary load;
wherein the comparison engine is configured to control the current consuming transistor to increase current draw or decrease current draw from the power transistor based on a difference between the regulated output voltage and the voltage reference.
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Accused Products
Abstract
A voltage regulator compensation circuit provides power to a dynamic load and includes a power transistor configured to drive the dynamic load, a reference determining transistor configured to establish a voltage reference proportional to a regulated output voltage of the power transistor, and a control circuit coupled to a gate input of both the power transistor and the reference determining transistor. Also included is a comparison engine configured to compare the regulated output voltage and the voltage reference, and a current consuming transistor operatively coupled to an output of the power transistor and configured to provide a varying secondary load. The comparison engine is configured to control the current consuming transistor to increase current draw or decrease current draw from the power transistor based on the difference between the regulated output voltage and the voltage reference.
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Citations
25 Claims
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1. A voltage regulator compensation circuit configured to provide power to a dynamic load, the compensation circuit comprising:
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a power transistor configured to drive the dynamic load; a reference determining transistor configured to establish a voltage reference proportional to a regulated output voltage of the power transistor; a control circuit coupled to a control input of the power transistor and coupled to a control input of the reference determining transistor; a comparison engine configured to compare the regulated output voltage and the voltage reference; a current consuming transistor operatively coupled to an output of the power transistor and configured to provide a varying secondary load; wherein the comparison engine is configured to control the current consuming transistor to increase current draw or decrease current draw from the power transistor based on a difference between the regulated output voltage and the voltage reference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A voltage regulator compensation circuit configured to provide a voltage output and a current output to a dynamic load, the compensation circuit comprising:
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a linear voltage regulator having; a power transistor having an output coupled to the dynamic load; the power transistor providing the regulated output voltage and the output current; and a control circuit coupled to a gate input of the power transistor and configured to control the power transistor; an optimization circuit having; a reference determining transistor configured to establish a voltage reference and a current threshold that are proportional to the regulated output voltage and the output current of the power transistor, respectively; a gate input of reference determining transistor coupled to the gate input of the power transistor and controlled by the control circuit; a comparison engine configured to compare the regulated output voltage and the voltage reference; a current consuming transistor operatively coupled to the output of the power transistor and configured to provide a varying secondary load, the current consuming transistor controlled by the comparison engine; wherein the comparison engine controls the current consuming transistor to increase current draw or decrease current draw from the power transistor based on the difference between the regulated output voltage and the voltage reference. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for compensating an output of a voltage regulator, comprising:
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driving a dynamic load with a power transistor, the power transistor providing a regulated output voltage to the dynamic load; selectively loading the power transistor with a current consuming transistor coupled to an output of the power transistor to provide a secondary load; establishing, using a reference determining transistor, a voltage reference proportional to the regulated output voltage of the power transistor; controlling, using a control circuit, a gate input of the power transistor and a gate input of the reference determining transistor; comparing the regulated output voltage and the voltage reference; wherein an output of the comparison engine controls the current consuming transistor to increase current draw or decrease current draw from the power transistor based on the difference between the regulated output voltage and the voltage reference.
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Specification