Texas Instruments

LP2981A-28DBVTE4

LP2981A-28DBVTE4 Description

The LP2981A-28DBVTE4 is a fixed output linear regulator designed for high performance and reliability in a variety of electronic applications. Manufactured by Texas Instruments, this IC offers a fixed output voltage of 2.8V and a maximum output current of 100mA. It is housed in a compact SOT23-5 package, making it suitable for surface mount applications where space is a critical factor.

This regulator is designed to operate with an input voltage range up to 16V, ensuring compatibility with a wide range of power sources. The low dropout voltage of 0.37V at 100mA allows the regulator to maintain efficiency even at low input-to-output voltage differentials. This feature is particularly beneficial in battery-powered devices where the input voltage may drop significantly over time.

LP2981A-28DBVTE4 Features

• Fixed Output Voltage: 2.8V, providing a stable power supply for sensitive electronic components.
• High Input Voltage Range: Up to 16V, ensuring compatibility with various power sources.
• Low Dropout Voltage: 0.37V at 100mA, enhancing efficiency and extending battery life in portable devices.
• Low Quiescent Current: 95 µA, minimizing power consumption during standby or low-load conditions.
• Enable Control Feature: Allows for dynamic control of the regulator's operation, enabling power-saving modes and system shutdowns.
• Protection Features: Overcurrent, overtemperature, and short-circuit protection ensure robustness and reliability in diverse operating conditions.
• High PSRR: 63dB at 1kHz, providing excellent noise rejection and stable output voltage under varying load conditions.
• Surface Mount Packaging: SOT23-5 package, ideal for compact and high-density PCB designs.
• Compliance: ROHS3 compliant and REACH unaffected, ensuring environmental and regulatory standards are met.

LP2981A-28DBVTE4 Applications

The LP2981A-28DBVTE4 is well-suited for a variety of applications where a stable and efficient power supply is required. Some specific use cases include:

• Portable Devices: Ideal for battery-operated devices such as smartphones, tablets, and wearables, where low dropout voltage and low quiescent current are crucial for maximizing battery life.
• Consumer Electronics: Suitable for applications like digital cameras, media players, and other consumer electronics that require a reliable and compact power solution.
• Industrial Equipment: Can be used in industrial control systems, sensors, and IoT devices where space constraints and high reliability are important factors.
• Medical Devices: Applicable in medical equipment where precise voltage regulation and low noise are necessary for accurate measurements and reliable performance.

Conclusion of LP2981A-28DBVTE4

The LP2981A-28DBVTE4 from Texas Instruments is a versatile and efficient linear regulator designed for applications requiring a fixed 2.8V output and up to 100mA of current. Its low dropout voltage, low quiescent current, and comprehensive protection features make it an ideal choice for a wide range of electronic devices, particularly those with space constraints and demanding power requirements. Despite being marked as obsolete, the LP2981A-28DBVTE4 remains a reliable option for designers seeking a proven and compliant power management solution.