Texas Instruments

LP2981AIM5-4.0

LP2981AIM5-4.0 Description

The LP2981AIM5-4.0 is a fixed output linear voltage regulator designed for applications a requiring stable 4V output with a maximum current capability of 100mA. Manufactured by Texas Instruments, this regulator is part of the Power Management Integrated Circuits (PMIC) category and is housed in a compact SOT23-5 surface-mount package. Despite being marked as obsolete, the LP2981AIM5-4.0 remains a reliable choice for low-power applications due to its robust design and performance characteristics.

LP2981AIM5-4.0 Features

• Output Type: Fixed at 4V, ensuring a stable and consistent power supply.
• Input Voltage Range: Capable of handling input voltages up to 16V, providing flexibility in power source selection.
• Output Current: Delivers a maximum output current of 100mA, suitable for low-power devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.37V at 100mA, the LP2981AIM5-4.0 efficiently operates even when the input voltage is close to the output voltage.
• Low Quiescent Current: Features a quiescent current of only 95 µA, minimizing power consumption in standby mode.
• High PSRR: Offers a power supply rejection ratio of 63dB at 1kHz, effectively filtering out noise from the input power supply.
• Protection Features: Includes over-current, over-temperature, and short-circuit protection, enhancing reliability and safety.
• Enable Control: Provides an enable feature, allowing for dynamic control of the regulator's operation.
• Compliance: The LP2981AIM5-4.0 is REACH unaffected and RoHS3 compliant, meeting environmental and regulatory standards.
• Moisture Sensitivity Level: Rated at MSL 1 (Unlimited), ensuring robustness against moisture exposure.

LP2981AIM5-4.0 Applications

The LP2981AIM5-4.0 is ideal for a variety of applications where a stable and efficient power supply is required. Its low dropout voltage and low quiescent current make it particularly suitable for battery-powered devices and portable electronics. Specific use cases include:

• Battery-Powered Devices: Ideal for applications such as handheld devices, portable sensors, and wearable technology where battery life and efficiency are critical.
• Low-Power Systems: Suitable for microcontroller-based systems, IoT devices, and other low-power applications that require a stable 4V supply.
• Industrial Applications: Can be used in industrial control systems, instrumentation, and other applications where a reliable and compact power solution is needed.
• Medical Devices: Appropriate for medical devices that require low power consumption and high reliability, such as portable diagnostic equipment and wearable health monitors.

Conclusion of LP2981AIM5-4.0

The LP2981AIM5-4.0 is a versatile and reliable linear voltage regulator that offers stable a 4V output with a maximum current of 100mA. Its low dropout voltage, low quiescent current, and high PSRR make it an efficient and effective solution for low-power applications. The inclusion of over-current, over-temperature, and short-circuit protection ensures robustness and reliability, while the enable control feature provides additional flexibility. Despite its obsolete status, the LP2981AIM5-4.0 remains a valuable component for applications requiring a compact, efficient, and reliable power supply.