Transient power control
First Claim
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1. A method useful in control of power to a power domain of an integrated circuit, comprising:
- determining if circuitry of a power domain is to transition from a low power state to a higher power state;
if the circuitry is to transition from the low power state to the higher power state;
providing power from a first power source to the circuitry of the power domain using a DC-DC switching converter, andproviding current from a second power source to the circuitry of the power domain on a plurality of selectable paths, with a number of selected paths of the selectable paths decreasing over time.
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Abstract
Automatic transient control circuitry may be used to alleviate issues relating to large changes in power demands by a load in an integrated circuit. The transient control circuitry may inject current to or retract current from a load, for example charging or discharging a bypass capacitor associated with the load, when circuitry of the load is commanded to an operational state from a standby state or vice-versa, respectively.
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Citations
33 Claims
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1. A method useful in control of power to a power domain of an integrated circuit, comprising:
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determining if circuitry of a power domain is to transition from a low power state to a higher power state; if the circuitry is to transition from the low power state to the higher power state; providing power from a first power source to the circuitry of the power domain using a DC-DC switching converter, and providing current from a second power source to the circuitry of the power domain on a plurality of selectable paths, with a number of selected paths of the selectable paths decreasing over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Circuitry useful in controlling transients in a power distribution system, comprising:
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a DC-DC switching converter coupled to a node for applying voltage to a power domain load; and a digitally controlled current source coupled to the node for applying current to the power domain load, in parallel with the DC-DC switching converter, in a ramping manner. - View Dependent Claims (21, 22, 23, 24)
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25. A system with a power transient control circuitry comprising:
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a first switch and a second switch coupled in series between a higher power source and lower power source; an inductor having one end coupled between the first and second switch and another end coupled to a capacitor and a power load in parallel; and a first plurality of paths selectively couplable between the higher power source and the power load, each of the first plurality of paths having a switch for selectively coupling the path between the higher power source and the power load. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification