Texas Instruments

LP2981-28DBVR

LP2981-28DBVR Description

The LP2981-28DBVR is a fixed output linear regulator from Texas Instruments, designed to provide a stable 2.8V output voltage with a maximum output current of 100mA. This regulator is housed in a compact SOT23-5 package, making it ideal for space-constrained applications. Despite its small form factor, the LP2981-28DBVR offers robust performance features, including a low dropout voltage of 0.37V at 100mA, which ensures efficient operation even at low input-to-output voltage differentials. The regulator also features a low quiescent current of 95µA and a maximum supply current of 1.7mA, contributing to its energy efficiency.

LP2981-28DBVR Features

• Fixed Output Voltage: Provides a stable 2.8V output voltage, ensuring consistent performance in various applications.
• High Efficiency: With a dropout voltage of 0.37V at 100mA, the LP2981-28DBVR operates efficiently even when the input voltage is close to the output voltage.
• Low Quiescent Current: The regulator features a low quiescent current of 95µA, which minimizes power consumption during operation.
• Enable Control: The enable feature allows for dynamic control of the regulator, enabling power savings and flexible system design.
• Protection Features: The LP2981-28DBVR includes over-current, over-temperature, and short-circuit protection, ensuring reliable operation and safeguarding against potential faults.
• High PSRR: The regulator offers a high power supply rejection ratio (PSRR) of 63dB at 1kHz, which helps in maintaining a clean output voltage by attenuating input noise.
• Compliance: The LP2981-28DBVR is REACH unaffected and RoHS3 compliant, meeting environmental and regulatory standards.
• Moisture Sensitivity Level: The regulator has an MSL of 1 (unlimited), making it suitable for a wide range of manufacturing environments.

LP2981-28DBVR Applications

The LP2981-28DBVR is well-suited for a variety of applications where a stable, low dropout voltage regulator is required. Some specific use cases include:

• Battery-Powered Devices: Ideal for portable electronics and battery-powered applications where efficiency and low quiescent current are critical.
• Low Power Systems: Suitable for low power systems that require a stable voltage supply with minimal power loss.
• Consumer Electronics: Can be used in consumer electronics where space is limited and high efficiency is necessary.
• Industrial Control: Applicable in industrial control systems where reliable voltage regulation and protection features are essential.

Conclusion of LP2981-28DBVR

The LP2981-28DBVR from Texas Instruments is a high-performance linear regulator that offers a combination of efficiency, reliability, and compactness. Its low dropout voltage, low quiescent current, and robust protection features make it an excellent choice for a wide range of applications, particularly in battery-powered and low power systems. Despite being marked as obsolete, the LP2981-28DBVR remains a reliable option for designers seeking a stable and efficient voltage regulation solution.