The LP3990MF-2.5 is a high-performance, low-dropout linear regulator from Texas Instruments, designed to meet the stringent power requirements of modern portable and wireless equipment. This regulator offers an optimal combination of low noise, high PSRR (Power Supply Rejection Ratio), low quiescent current, and low dropout voltage in a small package.

Key Features

• Output Voltage: The LP3990MF-2.5 provides a fixed output voltage of 2.5V, suitable for a variety of digital and analog circuits.
• High Accuracy: With an output voltage accuracy of ±1%, this regulator ensures precise power delivery for sensitive components.
• Low Dropout: The low dropout voltage allows the regulator to continue delivering a stable output even when the input-to-output voltage differential is minimal.
• Low Noise: Designed for noise-sensitive applications, it features a low output noise of 30µVRMS, which is crucial for RF and precision analog systems.
• High PSRR: With a PSRR of 75dB at 1kHz, it effectively suppresses variations in the input voltage, delivering a consistent output.
• Low Quiescent Current: The device consumes a low quiescent current of 50µA, making it ideal for battery-powered devices.
• Thermal Shutdown and Overcurrent Protection: Built-in safety features protect the device from over-temperature and overcurrent conditions.

Applications

The LP3990MF-2.5 is versatile and can be used in a range of applications, including:

• Mobile Phones
• PDAs and Handheld Devices
• Wireless LAN Devices
• Digital Cameras
• Portable Media Players
• GPS Receivers

Package and Availability

The regulator is available in a 5-pin SOT-23 package, which is designed for space-constrained applications. The compact form factor, combined with its performance characteristics, makes the LP3990MF-2.5 an excellent choice for designers looking to optimize power management in portable devices.

For detailed specifications, application notes, and ordering information, please visit the Texas Instruments official website or contact their customer support for assistance.