Power management system switched capacitor voltage regulator with integrated passive device
AssigneeApple Inc.
InventorsSanjay Dabral, David A. Secker, Jun Zhai, Ralf M. Schmitt, Vidhya Ramachandran, Wenjie Mao
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Abstract
Power management systems are described. In an embodiment, a power management system includes a voltage source, a circuit load located within a chip, and a switched capacitor voltage regulator (SCVR) coupled to voltage source and the circuit load to receive an input voltage from the voltage source and supply an output voltage to the circuit load. The SCVR may include circuitry located within the chip and a discrete integrated passive device (IPD) connected to the chip.
Claims16
A power management system comprising:
- a voltage source;
- a first switched capacitor voltage regulator (SCVR) coupled to the voltage source;
- a second SCVR coupled to the voltage source;
- a plurality of circuit loads;
- and
- a control circuit configured to:
- read performance states, weighted energy use, and binned voltage information for the plurality of circuit loads;
- determine a corresponding operating voltage for each circuit load of the plurality of circuit loads;
- assign a highest priority to a highest energy usage circuit load with a highest energy usage of the plurality of circuit loads;
- select a first SCVR conversion ratio mode of the first SCVR and an SCVR voltage input value from the voltage source for the circuit load with the highest energy usage;
- and
- select a second SCVR conversion ratio mode of the second SCVR for a next highest energy usage circuit load at the SCVR voltage input value;
- wherein the first SCVR is coupled to the circuit load with the highest energy usage to receive an input voltage from the voltage source corresponding to the SCVR voltage input value and supply a first output voltage to the circuit load with the highest energy usage;
- and
- wherein the second SCVR is coupled to the next highest energy usage circuit load to receive the input voltage corresponding to the SCVR voltage input value and supply a second output voltage to the next highest energy usage circuit load.
A method of operating a power management system comprising:
- reading a corresponding performance state for a plurality of circuit loads, weighted energy, and binned voltage information;
- determining a corresponding operating voltage for each circuit load;
- assigning a highest priority to a highest energy usage circuit load with a highest energy usage of the plurality of circuit loads;
- selecting a first switched capacitor voltage regulator (SCVR) conversion ratio mode of a first SCVR and an SCVR voltage input value for the highest energy usage circuit load;
- and
- selecting a second SCVR conversion ratio mode of a second SCVR for a next highest energy usage circuit load at the SCVR voltage input value.
Dependencies are inferred from the claim text.