LP3881ESX-1.2/NOPB

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The LP3881ESX-1.2/NOPB is a type of voltage regulators classified as PMIC (Power Management ICs) - Voltage Regulators - Linear. This device is a low-dropout voltage regulator, which provides the benefits of low quiescent current and provides a regulated output voltage with space-saving features that make it suitable for a variety of applications and circuit types. It includes features such as current limiting, thermal overload protection, and reverse voltage protection.

Application Field

The LP3881ESX-1.2/NOPB is designed for applications such as computer peripherals, consumer electronics, telecom equipment, industrial systems and battery powered systems, where a low-dropout (LDO) regulation is required. It is also suitable for point-of-load regulation, where space and power are at a premium. Its low dropout voltage and high output current capability allow for powering of digital loads, processors, ASICs, FPGA’s, microcontrollers and more.

Working Principle

Like all voltage regulators, the LP3881ESX-1.2/NOPB uses a variation of the Zener Barrier system. A Zener barrier is, in basic terms, a specially configured resistor element which, when connected to a potential source and load, forms a rectifying circuit, the output of which will maintain a pre-determined and regulated voltage. This system works by having two variable resistances connected in series and one connected in parallel with these two variable resistances.

The variable resistances are adjusted by using a control signal which is applied to the control input of the device. The control signal enables the load line to move in the vertical direction, thereby allowing the output voltage to remain at a constant level. As the control voltage is increased, the load line moves up the graph, and when the control voltage is decreased, the load line moves down the graph. As the load line moves in either direction, the difference between the input voltage and output voltage remains constant, thereby resulting in a regulated output voltage.

Other Features

The LP3881ESX-1.2/NOPB also provides several advanced features such as: adaptive off-mode current limit for extended battery life; over-voltage protection; reverse polarity protection; and a low-power shutdown mode. Additionally, its foldback current limit feature helps to ensure minimal power dissipation even under extreme fault conditions.

Overall, the LP3881ESX-1.2/NOPB offers a variety of beneficial features to it’s users. Its ability to maintain a constant regulated output voltage despite inputs fluctuations make it an ideal choice for a variety of applications and circuit types. Additionally, the other advanced features only add to its attractiveness as a voltage regulator choice.

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