Texas Instruments

LP2981IM5X-3.0

LP2981IM5X-3.0 Description

The LP2981IM5X-3.0 is a fixed output linear voltage regulator designed by Texas Instruments, offering a robust and efficient solution for applications requiring a stable 3V output at up to 100mA. This regulator is housed in a compact SOT23-5 package, making it ideal for space-constrained designs. Despite its small form factor, the LP2981IM5X-3.0 delivers high performance with a maximum input voltage of 16V and a dropout voltage of only 0.37V at full load. The regulator also features low quiescent current (95 µA) and excellent power supply rejection ratio (PSRR) of 63dB at 1kHz, ensuring minimal noise and high stability in the output voltage.

LP2981IM5X-3.0 Features

• Fixed Output Voltage: Provides a stable 3V output, ensuring consistent power supply to connected devices.
• High Input Voltage Range: Capable of handling input voltages up to 16V, making it versatile for various power sources.
• Low Dropout Voltage: With a maximum dropout voltage of 0.37V at 100mA, the regulator maintains efficiency even at low input-to-output voltage differentials.
• Low Quiescent Current: Consumes only 95 µA in quiescent state, minimizing power loss and extending battery life in portable applications.
• High PSRR: Achieves 63dB PSRR at 1kHz, effectively filtering out noise from the power supply and providing a clean output.
• Enable Control Feature: Includes an enable pin for easy control and shutdown, allowing for power savings and dynamic power management.
• Protection Features: Equipped with over-current, over-temperature, and short-circuit protection, ensuring reliable operation and safeguarding against potential faults.
• Surface Mount Packaging: The SOT23-5 package is suitable for surface mount technology, facilitating automated assembly and compact board designs.
• Moisture Sensitivity Level: MSL 1 (Unlimited) ensures the component is suitable for a wide range of manufacturing environments without additional handling precautions.

LP2981IM5X-3.0 Applications

The LP2981IM5X-3.0 is well-suited for a variety of applications where a reliable and efficient power supply is critical. Its low dropout voltage and high PSRR make it ideal for battery-powered devices, where maintaining a stable output voltage as the battery discharges is essential. The regulator's compact size and low quiescent current also make it suitable for portable electronics, such as smartphones, tablets, and wearable devices. Additionally, its robust protection features and enable control make it a reliable choice for industrial and automotive applications, where reliability and dynamic power management are paramount.

Conclusion of LP2981IM5X-3.0

The LP2981IM5X-3.0 from Texas Instruments stands out as a high-performance linear voltage regulator with a fixed 3V output and up to 100mA current capability. Its low dropout voltage, high PSRR, and low quiescent current offer significant advantages over similar models, making it an excellent choice for applications requiring stable and efficient power supply solutions. Despite being marked as obsolete, the LP2981IM5X-3.0 remains a reliable option for designers seeking a compact, high-performance regulator.