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US 12,184,175 B2Granted
Voltage regulator with boost current control circuitry
AssigneeShanghai Dn Semiconductors Co., Ltd.
InventorJaume Tornila Oliver
Life of this patent
Estimating the term…
Abstract
A voltage regulator with an amplifier for comparing a feedback voltage and a reference voltage. The output of the amplifier is adjusted based on the comparison to provide a regulated voltage at the regulator output. The regulator includes a current comparator that compares a current indicative of a current of the amplifier with a reference current to provide a signal used to enable a boost current circuit to provide boost current for the amplifier during a boost current event. The regulator includes current comparator control circuitry for providing improved performance of the current comparator in enabling and disabling the boost current to the amplifier.
Claims20
A circuit comprising:
- a voltage regulator circuit, the voltage regulator circuit comprising:
- an output to provide a regulated voltage;
- an amplifier, the amplifier including:
- a first input to receive a reference voltage;
- a second input to receive a feedback voltage indicative of the regulated voltage;
- an output to provide a control signal for adjusting the regulated voltage based on a comparison between the first input and the second input;
- a boost current path between a node of the amplifier and a supply voltage terminal, wherein the regulator circuit includes a switch to selectively enable and disable the boost current path;
- a switch control circuit configured to compare a first current indicative of a current of the amplifier and a reference current, the switch control circuit including an output for selectively controlling the switch to enable or disable the boost current path based on the comparison of the first current and the reference current;
- wherein the switch control circuit includes an assertion circuit that in response to a detected boost condition based on a comparison between the first current and the reference current, adjusts a voltage of the output of the switch control circuit to enable the boost current path for at least a time independent of a comparison between the reference current and the first current.
6 more elements
A circuit comprising:
- a voltage regulator circuit, the voltage regulator circuit comprising:
- an output to provide a regulated voltage;
- an amplifier, the amplifier including:
- a first input to receive a reference voltage;
- a second input to receive a feedback voltage indicative of the regulated voltage;
- an output to provide a control signal for adjusting the regulated voltage based on a comparison between the first input and the second input;
- a boost current path between a node of the amplifier and a supply voltage terminal, wherein the regulator circuit includes a switch to selectively enable and disable the boost current path;
- a switch control circuit configured to compare a first current indicative of a current of the amplifier and a reference current, the switch control circuit including an output for selectively controlling the switch to enable or disable the boost current path based on the comparison of the first current and the reference current;
- wherein the switch control circuit includes a comparison current path including a device to provide the first current in the comparison current path;
- wherein the switch control circuit includes a delay circuit including an output for providing a voltage indicative of the first current to a control terminal of the device.
7 more elements
A circuit comprising:
- a voltage regulator circuit, the voltage regulator circuit comprising:
- an output to provide a regulated voltage;
- an amplifier, the amplifier including:
- a first input to receive a reference voltage;
- a second input to receive a feedback voltage indicative of the regulated voltage;
- an output to provide a control signal for adjusting the regulated voltage based on a comparison between the first input and the second input;
- a boost current path between a node of the amplifier and a supply voltage terminal, wherein the regulator circuit includes a switch to selectively enable and disable the boost current path;
- a switch control circuit configured to compare a first current indicative of a current of the amplifier and a reference current, the switch control circuit including an output for selectively controlling the switch to enable or disable the boost current path based on the comparison of the first current and the reference current, wherein the switch control circuit includes a comparison current path including a device to provide the first current in the comparison current path for comparing the reference current with the first current;
- wherein the switch control circuit includes a delay circuit including an output for providing a voltage indicative of the first current to a control terminal of the device;
- wherein the switch control circuit includes an assertion circuit that in response to a detected boost condition based on a comparison between the first current and the reference current removes control of the voltage of the control terminal of the device by the delay circuit for at least a period of time.
7 more elements
Dependencies are inferred from the claim text.