REG102NA-3/3K

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REG102NA-3/3K Application Field and Working Principle

The REG102NA-3/3K is a low-drop, adjustable three-terminal regulator designed to supply a current of up to 200mA with excellent line and load regulation. This three-terminal voltage regulator can be used to provide a fixed output voltage of 3.3V or an adjustable output voltage on a range of 1.2V to 3.9V, depending on the user\'s requirements. In addition, its low-noise operation, fast transient response, built-in under-voltage protection, and the ability to operate from high-input voltages are just some of its features that make the REG102NA-3/3K an ideal voltage regulator for a wide range of applications.

Application Fields

The REG102NA-3/3K is widely used in a variety of electronic circuits and systems. It is commonly used in portable electronic equipment, industrial systems, and embedded systems, typically as a battery-backed fixed-output voltage regulator. It can be used for powering digital circuits which require an accurate and low-noise voltage reference as well as for providing a stabilized output voltage from a wide input voltage range. Other common applications include stepping down the voltage from a higher voltage DC source and providing protection from over-voltage and over-current.

Working Principle

The REG102NA-3/3K is a linear voltage regulator with three terminals, namely, the input voltage terminal, the output voltage terminal, and the ground terminal. It consists of an external series pass transistor and four control transistors. The voltage drop across the series pass transistor is regulated by the base drive to the control transistors. This is accomplished by using an internal, temperature-compensated bandgap reference in order to provide a precise, stable output voltage. When the voltage drop across the series pass transistor is increased, its current is increased, resulting in an increase in the output voltage. On the other hand, when the voltage drop is decreased, its current is decreased, resulting in a decrease in the output voltage. The output voltage is thus regulated by varying the base current to the control transistors.

The REG102NA-3/3K also features over-voltage and over-current protection to protect the connected device from damage due to over-voltage or over-current. It also features short-circuit protection, where the output current is limited to approximately 200mA when a short-circuit occurs at the output. Furthermore, the power losses in this voltage regulator are minimized thanks to its low-drop design.

Conclusion

In conclusion, the REG102NA-3/3K is a low-drop, adjustable three-terminal voltage regulator designed to provide a fixed output voltage or an adjustable output voltage on a range of 1.2V to 3.9V. It is used in a variety of electronic circuits and systems, and its features make it an ideal voltage regulator for a wide range of applications. Its excellent line and load regulation, low-noise operation, fast transient response, and built-in under-voltage protection are just some of its features that make it a great choice for voltage regulation and power management.

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