NJM79L09L2A

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NJM79L09L2A - PMIC Voltage Regulators - Linear

NJM79L09L2A is a three terminal fixed output voltage linear regulator integrated circuit (IC) designed by New Japan Radio Co. Ltd. It is a part of the family of linear type voltage regulators incorporated in the power management integrated circuit (PMIC) – voltage regulators - linear. It is used for various kinds of devices such as audiovisual, computer, measurement and communications equipment, home appliances, and office automatic equipment.

The NJM79L09L2A features an operating voltage range from 3V to 18V and a fixed output voltage of 9V. It has a high reliability and general-purpose functions such as over-current protection and thermal shutdown. The current-limiting circuit protects the output by limiting the current over a wide range.

NJM79L09L2A consists of a three-terminal adjustable regulator, current limiting and thermal shutdown circuits. The output voltage is regulated through an externally added resistor, which allows the user to set the proper voltage for the application. The current-limiting circuit is used to protect the output from excessive load current. The thermal protection circuit shuts down the output until the temperature of the device drops to a safe operating level.

The features of NJM79L09L2A include low output voltage ripple, low temperature coefficients, and low quiescent current. It has a high current output capability of 1.45A and its thermal resistance is around 50℃/W. The device is designed to provide excellent electrical performance and is available in three different packages: TO-220, SO-8, and SOT-23.

NJM79L09L2A is a useful and reliable device in a variety of applications. It is used, for example, as a power supply of portable devices that require high reliability and the supply voltage, which changes widely and often slightly, including mobile electronic equipment, digital cameras, and home electronics. It is widely used in computer, communication and automotive applications, wheresize, weight, and cost are important factors. It is also applicable for on/off control of AC motor driver, such as step motor, as well as non-inverting DC/DC converter.

NJM79L09L2A Working Principle

The NJM79L09L2A IC is a monolithic integrated circuit constructed in a single chip. The integrated circuit is utilized for controlling the current of a load that may consist of a power resistor or a transistor. There are three terminals on the device, which includes the input voltage (VIN), the output voltage (VOUT) and the ground (GND). The VIN pin of the IC is connected to the voltage source and the VOUT pin should be connected to the load. The GND pin should be connected to the ground.

The NJM79L09L2A IC works using an external resistor, resistor R. The resistance value of R can be easily obtained using the product data sheets. The IC provides a voltage drop between the input voltage and the output voltage, depending on the value of R. The current flowing through R determines the drop in voltage between the input and the output of the IC. The relationship between the voltage drop and the current is given in the form of the typical characteristics curves given in the product data sheets.

The NJM79L09L2A IC also contains various protection circuits, such as over current protection circuit, thermal protection circuit, short-circuit protection circuit, and the reverse polarity protection circuit, which protects against the sudden changes in the external circuit. These protection circuits ensure the function and stability of the NJM79L09L2A IC, even when faced with unexpected conditions.

Conclusion

NJM79L09L2A is a three terminal linear voltage regulator integrated circuit (IC) designed by New Japan Radio Co. Ltd as a part of the PMIC – voltage regulators - linear family. It has an operating voltage range from 3V to 18V with a fixed output voltage of 9V. The current-limiting circuit protects the output over a wide range. The device is useful in a variety of applications and requires the external resistor R to regulate the voltage drop between the input and the output. The protections circuits integrated in the device protect against sudden changes in the external circuit and maintain the stability of the device.

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