NJU7222U50

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The NJU7222U50 belongs to a class of voltage regulators, specifically linear voltage regulators. Its application fields and working principles are explained more thoroughly in this article.

A linear regulator allows for controlling the output voltage of a power supply that consists of a positive input supply and a negative ground reference. This regulator is composed of three main components: an operational amplifier, a transistor, and a voltage reference. The operational amplifier is utilized to generate an output voltage proportional to the difference between the input and output voltages. The output voltage ultimately produced is referred to as the feedback voltage. The transistor then amplifies the output of the operational amplifier and adjusts the output voltage to a predetermined level.

The NJU7222U50, in particular, is a single chip voltage regulator. It has a single integrated temperature compensation circuit, making it possible to obtain very stable output voltages even under high temperature environments. This linear regulator is ideal for use in solutions that require stable power at high temperatures. It has the ability to adjust output voltage in the range of 0.62V to 2.48V and can source and sink up to 5mA of output current.

When it comes to its working principle, the NJU7222U50 operates in a very simple manner. All it requires is the input voltage and an adjustable reference voltage for it to determine the output voltage. Current flows through the voltage reference and then to the input terminal. The voltage detector circuitry inside the regulator then produces the predetermined reference voltage onto the output terminal. This reference voltage is compared to the input voltage by an internal comparator. The output of the comparator then adjusts the gate voltage of the transistor to control the output voltage.

Due to its high temperature capability and wide range of adjustable output voltages, the NJU7222U50 is suitable in many different applications. It can be used to build high accuracy voltage references, battery powered systems, voltage monitoring systems, regulated DC-DC converters, and many other applications that require highly stable power.

In summary, the NJU7222U50 linear voltage regulator is a single chip solution that can be used to control output voltage over a wide range of temperatures. By controlling the adjustable reference voltage, it is capable of maintaining very stable output voltages in any application.

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