NJM78L24UA

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The NJM78L24UA is an adjustable three terminal Positive Voltage Regulator. It offers current limiting, thermal overload protection, and safe operating area protection.This IC is an adjustable shunt regulator, essentially a two terminal device which functions like the zener diode which is its principal active component, except that the zener diode is connected in series with a Current Limiting transistor.

The NJM78L24UA employs proprietary output devices to supply up to 800mA of output current with an output voltage range of 1.2V to 37V. The combination of current limiting, safe operating area, thermal overload, and short circuit protection makes the NJM78L24UA an ideal device for a wide variety of applications in a large range of voltage. It is especially well suited for linear power supplies.

The NJM78L24UA is ideal for small power supplies, application requiring low output noise, and voltage regulation applications. It is widely used in telecommunications, personal computers, automotive electronics, gaming, audio/video equipment, battery-operated systems, and industrial control systems.

The NJM78L24UA uses a two-terminal zener diode as the output regulating element which is connected in series with a transistor for current limiting. This linear voltage regulator is designed to maintain a set output voltage even when the input voltage, current or temperature varies. This is done by using a negative temperature coefficient of resistance (NTC) which depends on the ambient temperature. The NTC acts as a variable resistor reducing the amount of voltage through the transistor as the temperature increases, thus reducing the output voltage. As the temperature decreases, the NTC opens and current flows freely through the transistor and the output voltage increases.

The NJM78L24UA also offers a low dropout voltage and is designed to draw a minimum quiescent current. It features short circuit protection, thermal over-load protection, and a current-limiting circuit which allow the device to protect itself and the load it is powering against damage. It also has an adjustable pin that allows the output voltage to be adjusted to the desired voltage for a given load.

In summary, the NJM78L24UA is a three terminal, linear voltage regulator that is used for a variety of applications, such as telecommunications, automotive electronics, battery-operated systems and industrial control systems. It is able to provide an adjustable output voltage from 1.2V to 37V with up to 800mA of output current and offers a low dropout voltage, current limiting, thermal over-load protection, and a current-limiting circuit for good self-protection capabilities.

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