NCV551SN50T1

NCV551SN50T1 Application Field and Working Principle

The NCV551SN50T1 is a regulator chip from ON Semiconductor, which belongs to the Linear PMIC - Voltage Regulators family. The chip is a low dropout regulator specifically designed for products that need very low quiescent current from the power supply. It offers high efficiency and low noise, and the voltage output is adjustable from 1.25V to 10.5V.

The NCV551SN50T1 supports a wide input voltage range. It can be used as a regulator for both low voltages and high voltages, and also features high efficiency, adjustable output voltage and low quiescent current - among other features. It is available in a variety of packages and provides adjustable outputs over a range of 1.25V to 10.5V.

The NCV551SN50T1 is particularly suitable for applications that require small size and high power efficiency, such as wireless charging, wearables, medical devices, digital audio players and portable power supplies. It is an ideal choice for applications which require high efficiency, low noise and a low output voltage.

Working Principle

The NCV551SN50T1 consists of an internal power transistor, two voltage references and two calibrated resistors on board. The regulator\'s output voltage is created by a sum of two voltage references. The first reference is connected to the output of the power transistor, while the second reference is connected to the feedback resistor divider. The regulator has many features like low dropout, over power and over temperature protection, and a wide input voltage range.

The response time of the regulator is controlled by the thermally compensated voltage reference circuit. The regulator will start as soon as the input voltage reaches the minimum operating voltage of the device, and it will stop whenever the input voltage is lower than that. The regulators start to work in order to provide the correct output voltage.

Conclusion

The NCV551SN50T1 chip is an excellent choice for applications requiring small size, high power efficiency and adjustable output voltage up to 10.5V. It is particularly suitable for digital audio players, portable power supplies and wireless charging systems. It has low quiescent current and a wide input voltage range, as well as many other features. Its working principle is based on two voltage references, two calibrated resistors and a power transistor.