Linear voltage regulating circuit with undershoot minimization and method thereof
First Claim
1. A voltage regulating circuit for providing a regulated output voltage, comprising:
- a voltage regulator having a first output producing the regulated output voltage and a second output producing a pass voltage;
a converting circuit, coupled to the voltage regulator, for converting the pass voltage into a first current and a second current, wherein the converting circuit has a voltage input node coupled to the second output for receiving the pass voltage, a first converting node, and a second converting node, the first current flows through the first converting node, and the second current flows through the second converting node;
a capacitive device coupled to the first converting node;
a first current mirror module comprising a first current mirror path coupled to the first converting node and a second current mirror path coupled to the second converting node; and
a second current mirror module comprising a first current mirror path coupled to the second converting node and a second current mirror path coupled to the first output.
1 Assignment
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Accused Products
Abstract
A voltage regulating circuit for providing a regulated output voltage. The voltage regulating circuit includes a voltage regulator, a converting circuit, a capacitive device, a first current mirror module, and a second current mirror module. The voltage regulator has a first output producing the regulated output voltage and a second output producing a pass voltage. The converting circuit converts the pass voltage into a first current and a second current passing through a first converting node and a second converting node respectively, where the first current charges/discharges the capacitive device. The first current mirror module has a first current mirror path coupled to the first converting node and a second current mirror path coupled to the second converting node. The second current mirror module has a first current mirror path coupled to the second converting node and a second current mirror path coupled to the first output.
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Citations
18 Claims
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1. A voltage regulating circuit for providing a regulated output voltage, comprising:
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a voltage regulator having a first output producing the regulated output voltage and a second output producing a pass voltage; a converting circuit, coupled to the voltage regulator, for converting the pass voltage into a first current and a second current, wherein the converting circuit has a voltage input node coupled to the second output for receiving the pass voltage, a first converting node, and a second converting node, the first current flows through the first converting node, and the second current flows through the second converting node; a capacitive device coupled to the first converting node; a first current mirror module comprising a first current mirror path coupled to the first converting node and a second current mirror path coupled to the second converting node; and a second current mirror module comprising a first current mirror path coupled to the second converting node and a second current mirror path coupled to the first output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for providing a regulated output voltage, comprising:
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(a) providing a voltage regulator having a first output producing the regulated output voltage and a second output producing a pass voltage; (b) converting the pass voltage into a first current and a second current, and passing the first current and the second current at a first converting node and a second converting node, respectively; (c) coupling a capacitive device to the first converting node; (d) coupling a first current mirror path to the first converting node and a second current mirror path to the second converting node, wherein the first current mirror path corresponds to the second current mirror path; and (e) coupling a third current mirror path to the second converting node and a fourth current mirror path to the first output, wherein the third current mirror path corresponds to the fourth current mirror path. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification