Power-gated electronic device
AssigneeTexas Instruments Deutschland GmbH
InventorsJohannes Gerber, Frank Dornseifer
Life of this patent
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Abstract
A power-gated electronic device and a method of operating the same is provided. The power-gated electronic device comprises a low drop out voltage power supply (LDO), an auxiliary power supply and at least one electronic domain having a power gate. The LDO provides a supply voltage to the at least one electronic domain which is coupled to a supply rail of the LDO via a switch, acting as a power gate. The auxiliary power supply comprises at least one current source which is coupled to the electronic domain via an auxiliary switch acting as an auxiliary power gate. The auxiliary power supply is configured to control the auxiliary switch as a function of a voltage difference between a reference voltage and the auxiliary supply voltage.
Claims7
A power-gated electronic device comprising:
- a low drop out voltage power supply (LDO);
- an auxiliary power supply;
- and
- at least one electronic domain having a power gate;
- wherein the LDO is coupled to a primary voltage supply node and to a supply voltage rail for providing a supply voltage to the at least one electronic domain, wherein each electronic domain is coupled to the supply voltage rail of the LDO via a switch acting as a power gate for connecting the electronic domain to the supply voltage rail in an active mode and for disconnecting the electronic domain in a low power mode of the electronic device;
- wherein the auxiliary power supply comprises at least one current source which is coupled to the electronic domain via an auxiliary switch acting as an auxiliary power gate for providing an auxiliary supply voltage to the electronic domain;
- and
- wherein the auxiliary power supply is configured to control the auxiliary switch as a function of a voltage difference between a reference voltage and the auxiliary supply voltage.
A power-gated electronic device comprising:
- a low drop out voltage power supply (LDO);
- an auxiliary power supply;
- and
- a plurality of power-gated electronic domains;
- wherein the LDO is coupled to a primary voltage supply node and to a supply voltage rail for providing a supply voltage to the plurality of power-gated electronic domains, wherein each electronic domain in the plurality of power-gated electronic domains is coupled to the supply voltage rail of the LDO via a switch acting as a power gate for connecting the electronic domain to the supply voltage rail in an active mode and for disconnecting the electronic domain in a low power mode of the electronic device;
- wherein auxiliary power supply comprises a plurality of current sources and auxiliary switches, wherein each auxiliary current source and each auxiliary switch is dedicated and coupled to a respective electronic domain in the plurality of power-gated electronic domains, wherein the current sources of the auxiliary power supply are configured to provide an individual auxiliary supply voltage and/or current to each electronic domain in the plurality of power-gated electronic domains;
- wherein the auxiliary power supply is configured to control the auxiliary switches as a function of a voltage difference between a reference voltage and the auxiliary supply voltage.
Dependencies are inferred from the claim text.