NJM78L09L2A

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The NJM78L09L2A voltage regulator is a low dropout (<1.2V) two-terminal linear regulator with an output current of up to 500mA. It is commonly used in many consumer devices and projects, and is a great choice for providing a regulated DC voltage. The NJM78L09L2A is available in a standard TO-92 package, making it a simple option for almost any circuit.

Features of the NJM78L09L2A

• Low dropout regulator of only 1.2V.
• Output current up to 500mA.
• Available in surface-mount and leaded packages.
• Input and output voltage ranges of between 2V to 20V.

Applications of the NJM78L09L2A

The NJM78L09L2A is a low dropout regulator that can be used in a variety of applications, such as:

• Battery-powered devices, such as tablets and cellphones.
• Creating a regulated supply voltage from an unregulated source.
• Powering microcontrollers.
• Providing a clean supply voltage to sensitive components in projects and circuits.

Working principles of the NJM78L09L2A

The NJM78L09L2A is a low dropout linear voltage regulator, which means that it takes an input voltage and then outputs a regulated stable voltage using an embedded pass-transistor. This voltage regulator works by using the input voltage to turn on the pass-transistor and allow current to flow. As the current passes through the transistor, some of the voltage is lost due to the transistor’s resistance, and the output voltage will be slightly lower than the input voltage. This process is repeated every time a current is drawn, ensuring a stable output voltage.

The NJM78L09L2A also has an embedded error amplifier that acts as a voltage reference. This voltage reference is used to compare the output voltage to the desired output voltage and make any necessary adjustments, such as increasing or decreasing the current. The error amplifier also helps to protect the device from over-voltage or short-circuit conditions.

Conclusion

The NJM78L09L2A voltage regulator is a versatile, low dropout linear voltage regulator that can be used in a variety of applications. The device is available in standard packages, has a maximum output current of 500mA and features a built-in error amplifier to ensure a stable output voltage. Its low dropout voltage of 1.2V makes it suitable for use in battery-powered devices, and its range of compatible input and output voltage make it ideal for powering a wide range of projects.

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