VOLTAGE REGULATOR WITH RIPPLE COMPENSATION
First Claim
1. An apparatus for regulating voltage, comprising:
- a driving mechanism coupled to an output node, wherein the driving mechanism is configured to provide current to the output node to sustain a predetermined voltage on the output node; and
a boost circuit coupled to the output node, wherein the boost circuit is configured to drive an additional current onto the output node to reduce fluctuations in a voltage of the output node when a load coupled to the output node requires a transient switching current on the output node that must be provided faster than the loop response time of the driving mechanism.
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Abstract
Embodiments of the present invention provide a voltage regulator. The voltage regulator includes a driving mechanism coupled to an output node (VREG), wherein the driving mechanism is configured to provide current to the output node to sustain a predetermined voltage on the output node. In addition, the voltage regulator includes a boost circuit coupled to the output node, wherein the boost circuit is configured to drive an additional current onto the output node to reduce fluctuations in the output node voltage when a load coupled to the output node requires a transient switching current that is faster than the loop response time of the driving mechanism. Furthermore, the boost circuit is biased using a self-tracking mechanism to provide accurate duration and level of the current to the output node in a transient switching event.
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Citations
25 Claims
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1. An apparatus for regulating voltage, comprising:
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a driving mechanism coupled to an output node, wherein the driving mechanism is configured to provide current to the output node to sustain a predetermined voltage on the output node; and a boost circuit coupled to the output node, wherein the boost circuit is configured to drive an additional current onto the output node to reduce fluctuations in a voltage of the output node when a load coupled to the output node requires a transient switching current on the output node that must be provided faster than the loop response time of the driving mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for regulating voltage, comprising:
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providing current from a driving mechanism to an output node to sustain a predetermined voltage on the output node; and driving an additional current from a boost circuit to the output node to reduce fluctuations in a voltage of the output node when a load coupled to the output node requires a transient switching current on the output node that must be provided faster than the loop response time of the driving mechanism. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An electronic device, comprising:
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one or more circuits coupled to an output node, wherein the output node is configured to provide power for the circuit at a predetermined voltage; a driving mechanism coupled to an output node, wherein the driving mechanism is configured to provide current to the output node to sustain a predetermined voltage on the output node; and a boost circuit coupled to the output node, wherein the boost circuit is configured to drive an additional current onto the output node to reduce fluctuations in a voltage of the output node when the circuits require a transient switching current on the output node that must be provided faster than the loop response time of the driving mechanism. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification