Abstract: A memory module includes a circuit board, a plurality of memory devices, and a power management integrated circuit (PMIC). The circuit board includes first connectors, a second connector, and a third connector connected to an external device. The plurality of memory devices are mounted on the circuit board, and connected to the first connectors. The PMIC receives a first voltage through the second connector, generates a second voltage using the first voltage, and provides the second voltage to the plurality of memory devices The PMIC adjusts the second voltage based on a signal received through the third connector such that a voltage difference of the first voltage and the second voltage is reduced in a training mode of the memory module.

Abstract: A memory module includes a circuit board, a plurality of memory devices, and a power management integrated circuit (PMIC). The circuit board includes first connectors, a second connector, and a third connector connected to an external device. The plurality of memory devices are mounted on the circuit board, and connected to the first connectors. The PMIC receives a first voltage through the second connector, generates a second voltage using the first voltage, and provides the second voltage to the plurality of memory devices The PMIC adjusts the second voltage based on a signal received through the third connector such that a voltage difference of the first voltage and the second voltage is reduced in a training mode of the memory module.

Abstract: A memory module includes semiconductor memory devices, a power management integrated circuit (PMIC), and a control device. The semiconductor memory devices, mounted on a circuit board, operate based on a power supply voltage. The PMIC, mounted on the circuit board, generates the power supply voltage, provides the power supply voltage to the semiconductor memory devices, and stores a trimming control code associated with a minimum level of the power supply voltage when the semiconductor memory devices operate normally in a test mode. During the test mode, the PMIC adjusts a level of the power supply voltage, tests the semiconductor memory devices using the adjusted power supply voltage, and stores the trimming control code based on a result of the test. The control device controls the PMIC based on a first control signal received from an external device.

Abstract: A memory module includes semiconductor memory devices, a power management integrated circuit (PMIC), and a control device. The semiconductor memory devices, mounted on a circuit board, operate based on a power supply voltage. The PMIC, mounted on the circuit board, generates the power supply voltage, provides the power supply voltage to the semiconductor memory devices, and stores a trimming control code associated with a minimum level of the power supply voltage when the semiconductor memory devices operate normally in a test mode. During the test mode, the PMIC adjusts a level of the power supply voltage, tests the semiconductor memory devices using the adjusted power supply voltage, and stores the trimming control code based on a result of the test. The control device controls the PMIC based on a first control signal received from an external device.