NJM79M18FA

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Introduction

NJM79M18FA is one of the products in the an extensive range of low power regulators offered by the New Japan Radio Company. This voltage regulator comes with an integrated linear regulator, enabling it to provide smooth voltage regulation and precise current regulation, while having unbeatable performance, due to its multi-tier structure and high reliability. This makes the NJM79M18FA a solid choice for power systems both in the industrial and consumer markets.

Application Field

The NJM79M18FA is typically used for applications in battery powered systems, such as portable equipment and cellular phones that need precise voltage and current regulation. Other application fields of the device includes power supplies for LCD TVs, household appliances, automotive applications, USB controllers, and various other portable devices. It is also suitable for a wide range of battery sizes and types, and is fully qualified to comply with regulations around the world.

Features and Benefits

Typically, a system that uses the NJM79M18FA will benefit from its multi-tier structure, which provides high efficiency and low power consumption, as well as a better thermal performance and higher stability. The regulator also features low output noise and output current protection, which make it suitable for applications that require precision and stability. In addition, the device offers a wide input voltage range of 5.5V to 16V, and the ability to support a wide range of output current requirements.

The NJM79M18FA also comes with a wide range of protection functions, such as thermal shutdown protection, predated thermal protection, overcurrent protection, and overvoltage protection. This enables it to provide greater reliability and safety, and make excellent choices as power regulators for a variety of different electronic circuits.

Working Principle

The NJM79M18FA is an linear regulator, which uses an internal circuit consisting of a voltage reference, an error amplifier and a series of PNP transistors, which provide current limiting and current control. The error amplifier serves to compare the output voltage of the regulator to the reference voltage and outputs a proportional error voltage. This error voltage is then used to determine the output voltage of the regulator.

When the current passing through the circuit exceeds the current limit, the voltage drop across the PNP transistors is increased, thus reducing the current flow through the circuit. This, in turn, reduces the output voltage and provides the desired current and voltage regulations. The NJM79M18FA also has an internal temperature sensor, which is used for temperature protection and over temperature protection, ensuring better reliability and safety in operation.

Conclusion

The NJM79M18FA is an efficient and reliable linear voltage regulator from the highly respected New Japan Radio Company. It has a multi-tier structure, enabling it to provide fine-grain regulation, while still maintaining high stability and efficiency. It is also designed with a wide input voltage range, as well as several protection features, making it suitable for a variety of electronic circuits. Furthermore, the NJM79M18FA has a working principle that relies on a voltage reference, an error amplifier, and some PNP transistors, which allows it to accurately regulate both voltage and current. This makes it a perfect choice for battery-powered systems such as portable devices, LCD TVs, and automotive applications, where reliability and precision are needed.

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