NCP551SN18T1G

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The NCP551SN18T1G is a linear voltage regulator with the capability to regulate output voltages ranging from 1.2V to 18V. This regulator is effective for making power-factor corrections in zener diode voltage regulator circuits, as well as in applications where an adjustable output voltage is desired.

This NCP551SN18T1G voltage regulator is designed to sustain a current load up to 1.5A and can operate in both fixed and adjustable configurations. It features an overvoltage protection circuit that sense and limits the output voltage above 18V. This state-of-the-art voltage regulator also offers thermal shutdown, current limit protection, and output short-circuit protection.

Features

• 1.2V to 18V adjustable voltage output
• Current capability up to 1.5A
• Temperature protection
• Improved line regulation
• In-built thermal shutdown and current limit protection
• Output short-circuit protection

Applications

The NCP551SN18T1G linear voltage regulator can be used in a variety of applications that require adjustable and reliable voltage regulation. Some of these applications include portable device power supplies, laptop computer displays, LED lighting, consumer electronics, and power adapters. This versatile voltage regulator is also suitable for automotive and industrial equipment, precision instrumentation and measurement, audio and video equipment, and many other consumer and industrial applications.

Working Principle

The NCP551SN18T1G linear voltage regulator consists of a resistor, an amplifier, and an output transistors. The resistor connected between the input and output terminals serves as the primary factor in controlling the output voltage. When a voltage is applied to the input, the amplifier monitors the voltage level and adjusts the resistor to ensure that the output voltage remains constant. The output transistors are then responsible for providing the necessary current to the load and protecting the circuit from overvoltage and thermal damage by reducing the current flow.

This linear voltage regulator can be used to regulate a large variety of power sources, such as external DC sources, rectified AC sources, or battery-powered sources. Its adjustable output voltage capabilities and built-in protection features make it an ideal choice for many applications.

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