Memory systems, control methods thereof, and power loss protection systems

A method of controlling a memory system, wherein the memory system comprises a non-volatile memory device, a volatile memory device, a memory controller, a resistor-capacitor circuit, a power loss protection circuit, and a voltage regulator circuit;

• the non-volatile memory device and the volatile memory device are coupled to the memory controller;
• the resistor-capacitor circuit is coupled to the non-volatile memory device, the volatile memory device, the memory controller, the power loss protection circuit, and the voltage regulator circuit;
• the control method comprises:
• adjusting, by the voltage regulator circuit, an equivalent impedance of the resistor-capacitor circuit in response to a first control signal;
• and
• performing a capacitance inspection operation based on a capacitance of a capacitor after adjusting the equivalent impedance of the resistor-capacitor circuit.

A power loss protection system, comprising

• a resistor-capacitor circuit including a capacitor configured to provide a power;
• a power loss protection circuit coupled to the resistor-capacitor circuit and configured to charge the capacitor;
• a voltage regulator circuit coupled to the resistor-capacitor circuit and configured to adjust an equivalent impedance of the resistor-capacitor circuit in response to a first control signal;
• and
• a control circuit coupled to the voltage regulator circuit and the power loss protection circuit and configured to:
• output the first control signal to the voltage regulator circuit;
• and
• determine a state of health of the capacitor based on a capacitance of the capacitor acquired by using the power loss protection circuit after adjusting the equivalent impedance .