LP2981IBP-3.3/NOPB

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LP2981IBP-3.3/NOPB is a high-performance Voltage Regulator belonging to the series of Linear Voltage Regulators. It is a low drop-out(LDO) regulator which has numerous application fields.

The power supply of LP2981IBP-3.3/NOPB is typically between 2.7V to 16V and the output voltage is 3.3V for fixed output type. It also has an adjustable output voltage between 1.25V to 13V. Maximum output current of the device is 600mA.

LP2981IBP-3.3/NOPB is available in small packages such as SOT23, SC70 and MLP. The device has high power supply rejection ratio and low output noise voltage. It is designed for low EMI operation.

LP2981IBP-3.3/NOPB is used in various applications such as CD-ROM/CD-R drives, DVD players and cell phones. It is also used in battery operated applications where low quiescent current and high power supply rejection ratio is desirable. The device can also be used in portable communications equipments to increase the endurance.

The working principle of LP2981IBP-3.3/NOPB involves an error amplifier and a voltage reference. The error amplifier senses the output voltage and compare it with the reference voltage. If there is any increase or decrease in the output voltage, the error amplifier will drive the whole system to balance it out.

The device has a power transistor at its output stage which is connected to the non-inverting input of the error amplifier. If the output voltage is higher than the reference, the transistor will be turned off thus reducing the output voltage. On the other hand, if the output voltage is lower than the reference voltage, the transistor will be turned on thus increasing the output voltage.

LP2981IBP-3.3/NOPB also has a current limit circuit which helps in preventing over-current in the output stage. The current limit circuit is connected to the output. If the current in the output stage exceeds the maximum limit, the circuit will be activated and it will limit the output current to a safe value.

LP2981IBP-3.3/NOPB also features thermal protection which will shut down the device if the internal temperature reaches over 125°C. The device has an internal soft-start circuit which is used to reduce inrush current and also to reduce output voltage ringing in the output stage.

LP2981IBP-3.3/NOPB is an ideal choice for systems which require high power supply rejection ratio, accurate voltage regulation, low output noise and excellent thermal stability. It is widely used in various applications due to its compact size, low power consumption and high-end features.

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