LP3981ILDX-2.7

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The LP3981ILDX-2.7 is a low-noise, low-dropout (LDO) linear voltage regulator that provides a stable DC voltage supply with a current capability of up to 100mA. It is a member of the LP3981 Linear Voltage Regulator Series manufactured by Renesas Electronics and it is classified under Power Management IC (PMIC) category – Voltage Regulators – Linear.

The LP3981ILDX-2.7 offers the user a variety of features that make it ideal for a wide range of applications, such as consumer and industrial electronics, personal digital assistants (PDAs), communication equipment, and embedded systems. It has a wide operating temperature range of -40 to +85°C, low quiescent current at 175μA, and low dropout voltage of 0.2V. It also features an active-high/active-low shutdown pin for power savings during periods of inactivity, as well as a thermal shutdown for over-temperature protection.

In addition to its features, the LP3981ILDX-2.7 also has several application fields. It is often used to provide the necessary voltage output from lithium ion battery sources, such as cell phones and PDAs, to power various peripherals that require an accurate voltage supply. It can be used as a reference voltage supply for analog and digital circuits as well. It is also suitable for power supplies that need to maintain low noise and high output ripple rejection.

The working principle of the LP3981ILDX-2.7 is based on the properties of the various components it contains, including transistors and resistors. Basically, it translates the input voltage into an output voltage that is adjustable through a feedback loop, allowing the user to set the desired voltage output. It works by measuring the amount of current flowing through the base-emitter combination of the transistor, and comparing it with the voltage at the inputs of the regulation circuit. If there is a difference between the two, the output voltage is adjusted accordingly until the desired output voltage is achieved. The output is then regulated via a PNP transistor that controls the current and acts as a stabilizer.

The LP3981ILDX-2.7 is an ideal choice for a variety of applications requiring a low-dropout linear voltage regulator. Its features make it an excellent choice for a wide range of applications, from consumer electronics to industrial and embedded systems. Its wide operating temperature range, low-noise and ripple rejection capabilities make it an ideal choice for portable applications including cellular phones, PDAs, communication equipment, and embedded systems.

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