NX2422CMTR

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NX2422CMTR is a voltage monitoring LDO regulator specifically designed to provide precise, low side current sensing up to 3A in applications typically found in telecom and computer equipment. Its unique feature set makes it ideal for use in a variety of applications that require precise current monitoring and low dropout voltage. In this article, we will take a look at the application field and working principle of the NX2422CMTR.

Application Fields

The NX2422CMTR can be used in a variety of applications such as power management systems, DC/DC converters, and as a linear regulator in commercial and industrial applications. The device is also suitable for controlling LCDs, LEDs, and other power sources. It is attractive in applications where a low dropout voltage regulator is necessary but only a low current is required. Among other applications, it can be easily used in power supplies, isolated power systems, and gate drives.

Working Principle

The NX2422CMTR is a simple and reliable, low dropout monitoring linear regulator device that provides a sense resistor-controlled current limit at its output. It can also be configured to operate in a buck/boost configuration, providing one or more rails an output current sweep integration (OCSI) capability. The device is composed of five sections: power, voltage, current sensing, temperature sensing, and programming. The input voltage is applied to the power section, which then regulates and supplies the desired output power level.

The voltage section provides the controller with the necessary voltage reference signals to control the output voltage. It contains a low-dropout regulator (LDO), an active current source (ACS), and a voltage error amplifier (VEA) to sense the voltage sensed at the output. The current sensing section contains a current sense amplifier (CSA) to integrate the output current signal and a temperature sensing diode (TSD) to monitor the device temperature.

The programming section contains an SPI interface to set the output voltage, soft start, current limit and temperature protection limits. The programming section also contains an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC) to ensure very low output voltage ripple and noise. The programming can also be adjusted to control the output voltage and current limit. Finally, there is a power-on reset (POR) generator that provides a reset signal when the device is powered on.

In summary, the NX2422CMTR is a precision voltage monitoring low-dropout regulator specifically designed for applications requiring precise current monitoring and low dropout voltage. The device is composed of five sections, including power, voltage, current sensing, temperature sensing, and programming functions. It is suitable for controlling LCDs, LEDs, and other power sources, as well as power management systems, DC/DC converters, and as a linear regulator in commercial and industrial applications.

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