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US 7,454,637 B2Granted
Voltage regulator having reduced droop
AssigneeIntel Corporation
InventorsKim Soi Er, Yick Yaw Ho, Chuen Ming Tan
Life of this patent
Estimating the term…
Abstract
An on-die voltage regulator having a suspend mode voltage generator and an active mode voltage generator. Output drivers of the active mode voltage generator are disabled in stages to reduce voltage droop when transitioning between the active mode voltage generator and the suspend mode voltage generator.
Claims18
A method comprising
- in response to a first mode of operation, enabling a plurality of output drivers to supply an output voltage, and
- in response to a second mode of operation, enabling an operational amplifier to supply the output voltage, and disabling the plurality of output drivers in a plurality of stages to compensate for a slew rate of the operational amplifier;
- wherein disabling the plurality of output drivers comprises disabling one output driver at a time.
An apparatus comprising
- a suspend mode voltage generator to provide an output voltage in response to being enabled, and
- an active mode voltage generator to provide the output voltage in response to being enabled and to compensate for a slew rate of the suspend mode voltage generator in response to being disabled;
- wherein the active mode voltage generator comprises
- a plurality of output drivers to provide the output voltage in response to being enabled, and
- a plurality of delay elements to disable the plurality of output drivers in a plurality of stages.
2 more elements
A system comprising
- a power supply to provide electrical power, and
- an integrated circuit comprising a core logic to implement functions of the integrated circuit and a voltage regulator to receive electrical power from the power supply, to provide the core logic with a voltage during an active mode, and to maintain the voltage above a predetermined level during a transition between an active mode and a suspend mode, wherein the voltage regulator comprises a plurality of output drivers to provide the voltage to the core logic during the active mode;
- wherein the voltage regulator comprises a plurality of delay elements to disable the plurality of output drivers in a plurality of stages during the transition between the active mode and the suspend mode.
Dependencies are inferred from the claim text.