XC6122C333MR-G

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The XC6122C333MR-G is a member of the Mitsubishi Electric XC6120 Series of low-dropout voltage regulators (LDOs). This device is a fixed 3.3V bipolar output low-noise regulator.The main application field of XC6122C333MR-G includes powering microprocessors, memory, and many analog ICs. This IC is suitable for audio application with its low output impedance and low noise characteristics. It is also suitable for use in mobile purposes and in applications requiring high reliability.The major features of XC6122C333MR-G include high efficiency, low dropout voltage, wide input voltage range from 2.5V to 12V, current limit protection, protection against short-circuit, over-voltage, and under-voltage.The working principle of XC6122C333MR-G is based on an internal PMOS pass-transistor and an N-Channel MOSFET that works as a low-dropout regulator. The input voltage is connected to the gates of the NMOS and PMOS transistors. The current then flows through the pass transistor, while the voltage across the pass transistor is controlled by the error amplifier. This voltage is then regulated at the desired output voltage. The error amplifier then compares the output voltage with a reference voltage. If there is a difference between the two, the error amplifier then amplifies this difference. The result is then fed through a loop compensation network and back to the gates of the NMOS and PMOS transistors. This ensures that the output voltage remains at the desired value.In addition to the error amplifier, XC6122C333MR-G also employs a bandgap voltage reference. This reference voltage is used as the voltage reference for the error amplifier. The bandgap voltage reference is also utilized for reporting the output voltage by the status pin.The XC6122C333MR-G also integrates several protection features to ensure its safe operation. This includes under-voltage detection, over-voltage detection, and current limit protection. The over-voltage detection is used to monitor the output voltage and provides a signal to the error amplifier if the target voltage has been exceeded. The current limit protection is used to prevent excessive current from flowing into the output if the load current exceeds the device\'s limit. In summary, XC6122C333MR-G is a PMIC - Supervisors device that is suitable for powering microprocessors, memory, and many analog ICs. It is designed with an internal PMOS pass-transistor and an N-Channel MOSFET that works as a low-dropout regulator. The device also provides several protection features such as under-voltage protection, over-voltage detection, and current limit protection.

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