Texas Instruments

LP2981AIM5X-2.5/NOPB

LP2981AIM5X-2.5/NOPB Description

The LP2981AIM5X-2.5/NOPB is a fixed-output linear regulator designed by Texas Instruments. This device is part of the Power Management Integrated Circuits (PMIC) category and is housed in a SOT23-5 package, making it suitable for surface-mount applications. It provides a fixed output voltage of 2.5V and can deliver up to 100mA of output current. The regulator is designed to operate with an input voltage range up to 16V and features a low dropout voltage of 0.37V at 100mA, ensuring efficient operation even at low input-to-output voltage differentials.

LP2981AIM5X-2.5/NOPB Features

• Fixed Output Voltage: The LP2981AIM5X-2.5/NOPB offers a stable 2.5V output voltage, making it ideal for applications requiring a precise and consistent power supply.
• High Efficiency: With a low dropout voltage of 0.37V at 100mA, this regulator maintains high efficiency even when the input voltage is close to the output voltage.
• Low Quiescent Current: The device features a quiescent current of only 95 µA, which is crucial for battery-powered applications where minimizing power consumption is essential.
• Enable Control Feature: The regulator includes an enable pin, allowing for dynamic control of the output voltage, which can be useful in power sequencing and power-saving modes.
• Protection Features: The LP2981AIM5X-2.5/NOPB incorporates over-current, over-temperature, and short-circuit protection, ensuring robustness and reliability in various operating conditions.
• High PSRR: The regulator boasts a power supply rejection ratio (PSRR) of 63dB at 1kHz, which helps in filtering out noise from the input supply and maintaining a clean output voltage.
• Compliance and Packaging: The device is REACH unaffected and RoHS3 compliant, making it suitable for environmentally conscious designs. It is available in a tape and reel (TR) package, facilitating automated assembly processes.

LP2981AIM5X-2.5/NOPB Applications

The LP2981AIM5X-2.5/NOPB is well-suited for a variety of applications where a stable and efficient power supply is required. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and high efficiency make this regulator ideal for portable electronics and battery-operated devices where minimizing power consumption is critical.
• Low-Dropout Applications: The low dropout voltage ensures that the regulator can operate efficiently even when the input voltage is close to the output voltage, making it suitable for applications with tight voltage margins.
• Sensitive Analog Circuits: The high PSRR helps in maintaining a clean output voltage, which is beneficial for sensitive analog circuits and precision instrumentation.
• Microcontroller Power Supplies: The enable control feature and protection mechanisms make this regulator a reliable choice for powering microcontrollers and other digital circuits.

Conclusion of LP2981AIM5X-2.5/NOPB

The LP2981AIM5X-2.5/NOPB from Texas Instruments is a versatile and efficient linear regulator designed for applications requiring a stable 2.5V output and up to 100mA of current. Its low dropout voltage, low quiescent current, and high PSRR make it an excellent choice for battery-powered devices and sensitive analog circuits. The inclusion of enable control and comprehensive protection features further enhances its reliability and flexibility. Despite being marked as obsolete, the LP2981AIM5X-2.5/NOPB remains a robust solution for power management needs in various electronic designs.