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US 9,806,620 B2Granted
Multi-phase hysteretic buck switching regulator
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsDaniel Melendy, Mark Rutherford
Life of this patent
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Abstract
Methods, systems, circuits, devices, and apparatuses are described for multi-phase hysteretic buck switching regulators. Systems, circuits, devices, and apparatuses for multi-phase hysteretic buck switching regulators may include master phase components, multi-phase delay generators, and one or more slave phase components. Methods for multi-phase hysteretic buck switching regulation are also provided.
Claims20
A multi-phase hysteretic buck switching regulator, comprising:
- a master phase circuit configured to generate a master converted voltage in phase with a received master control signal at an output node;
- a variable delay generator configured to receive the master control signal and generate at least one pulse width modulated signal that is a representation of the master control signal;
- and
- at least one slave phase circuit, each slave phase circuit of the at least one slave phase circuit configured to:
- receive a corresponding pulse width modulated signal generated by the variable delay generator;
- and
- generate a corresponding slave converted voltage in phase with its corresponding pulse width modulated representation at the output node.
4 more elements
A variable delay generator, comprising:
- divider circuitry configured to:
- receive a maximum value of a peak of a ramp voltage;
- and
- divide the maximum value of the peak of the ramp voltage based on a number of output phases to generate one or more divided values;
- and
- output circuitry comprising one or more comparators, each comparator being in an open-loop configuration and configured to:
- generate a phase-shifted signal that is a representation of a control signal based on the one or more divided values and a comparator ramp voltage for either of a falling edge or a rising edge of the control signal.
4 more elements
A device, comprising:
- at least one circuit that includes:
- peak detector circuitry comprising;
- an output switch configured to provide a peak voltage signal;
- a first voltage source electrically coupled to a first input of the output switch;
- and
- a peak input node electrically coupled to a second input of the output switch;
- and ramp generator circuitry comprising:
- a first current source electrically coupled in series at a shield node to a first capacitor in parallel with a first reset switch;
- and
- a second current source electrically coupled in series at a ramp node to parallel circuitry comprising:
- a first control switch in series with a second capacitor;
- a second control switch in series with a third capacitor;
- and
- a second reset switch;
- the first control switch and the second control switch configured to exclusively alternate connections between the ramp node and the peak input node responsive to an active edge of a control signal;
- and
- the second current source configured to generate a ramp voltage via the first capacitor and the second capacitor.
14 more elements
Dependencies are inferred from the claim text.