LP3891EMR-1.2

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The LP3891EMR-1.2 is a low-noise, low-dropout linear regulator with excellent line and load regulation. This linear regulator is designed to provide an adjustable output voltage between 0.8V and 15V with extremely low noise. It is excellent for powering voltage sensitive applications such as microprocessors, amplifiers and other millisecond-sensitive circuits.In this article, we will discuss the application fields of the LP3891EMR-1.2 and its working principle.

Application Fields

The LP3891EMR-1.2 is suitable for use in a wide range of applications. It can be used to provide power supply to any type of system with a very low noise output. It is ideal for use in systems such as laptop computers, personal digital assistants (PDAs), digital cameras, cell phones, gaming consoles and many other battery-powered applications. The LP3891EMR-1.2 is also suitable for use in medical, automotive, industrial and high-temperature applications. The device has a wide temperature range (-40°C to +125°C) which makes it suitable for use in extreme environments.It can also be used for powering applications that require a very low output voltage or a very low output noise level. This device is capable of providing an adjustable output voltage between 0.8V and 15V with a noise level of less than 8uVrms. This makes it ideal for powering ultra-sensitive applications such as microprocessors and amplifiers that require very low noise levels.

Working Principle

The LP3891EMR-1.2 linear regulator operates on the principle of controlling output voltage by controlling input current. It is a very efficient device that offers very low current consumption and low quiescent currents. To regulate the output voltage, the device utilizes a voltage reference and an N-channel MOSFET. When the device is supplied with input voltage, the voltage reference forms a fixed voltage across the MOSFET which can be set using external resistors. By control of the voltage reference, the output voltage of the device can be adjusted to the desired level. The LP3891EMR-1.2 also has a built-in power good indicator which signals when the input voltage is within an acceptable range and the output is within regulation. It also offers protection against short-circuits, over-voltage, over-current and reverse polarity. The device is also equipped with an enable input that can be used to enable or disable the device. It also has an open-drain output that can be used to indicate the current state of the device.

Conclusion

The LP3891EMR-1.2 is a low-noise, low-dropout linear regulator with excellent line and load regulation. It is capable of providing an adjustable output voltage between 0.8V and 15V with a noise level of less than 8uVrms. This makes it suitable for use in a wide range of applications such as laptops, PDAs, digital cameras, cell phones, gaming consoles and many other battery-powered applications. In addition, it offers protection against short-circuits, over-voltage, over-current and reverse polarity. It also has a built-in power good indicator and an enable input and output for monitoring. All these features make the LP3891EMR-1.2 an ideal choice for powering many ultra-sensitive applications.

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