Power management integrated circuit and method of operating the power management integrated circuit
AssigneeSamsung Electronics Co., Ltd.
InventorsHyunseok Nam, Daehan Yu
Life of this patent
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Abstract
A power management integrated circuit and a method of operating the power management integrated circuit are disclosed. The power management integrated includes an upper regulator circuit that receives a system voltage as an input and outputs a first output voltage; a lower regulator circuit having the first output voltage as an input; and a Kelvin switch circuit connected between the upper regulator circuit and the lower regulator circuit. The Kelvin switch circuit includes a plurality of switches that connect any one of a plurality of upper regulators included in the upper regulator circuit to any one of a plurality of lower regulators included in the lower regulator circuit.
Claims20
A power management integrated circuit comprising:
- an upper regulator circuit configured to receive a system voltage as a first input and output a first output voltage;
- a lower regulator circuit having the first output voltage as a second input;
- and
- a Kelvin switch circuit connected between the upper regulator circuit and the lower regulator circuit,
- wherein the Kelvin switch circuit includes a plurality of switches configured to connect any one of a plurality of upper regulators included in the upper regulator circuit to any one of a plurality of lower regulators included in the lower regulator circuit.
A power management integrated circuit comprising:
- a first switching regulator and a second switching regulator each receiving a system voltage as an input;
- a first low drop-output (LDO) regulator and a second LDO regulator respectively connected to a first output terminal of the first switching regulator or a second output terminal of the second switching regulator;
- a first Kelvin sensing circuit connected between a first feedback voltage terminal of the first switching regulator and a first power node of the first LDO regulator, and between a second feedback voltage terminal of the second switching regulator and the first power node of the first LDO regulator;
- and
- a second Kelvin sensing circuit connected between the first feedback voltage terminal of the first switching regulator and a second power node of the second LDO regulator, and between the second feedback voltage terminal of the second switching regulator and the second power node of the second LDO regulator.
A method of operating a power management integrated circuit, the method comprising:
- applying a system voltage to an upper regulator circuit;
- generating a primary output voltage through the upper regulator circuit;
- and
- feedback-sensing the primary output voltage by controlling a Kelvin switch circuit connected between a lower regulator circuit to which the primary output voltage is applied and the upper regulator circuit.
Dependencies are inferred from the claim text.