Texas Instruments

LP2987IM-3.3

LP2987IM-3.3 Description

The LP2987IM-3.3 is a fixed output linear voltage regulator designed by Texas Instruments, offering a stable 3.3V output voltage with a maximum output current of 200mA. This regulator is housed in an 8-pin SOIC package, making it suitable for surface mount applications. It features a low dropout voltage of 0.35V at 200mA, which is ideal for applications where the input voltage is close to the required output voltage. The regulator also includes protection features such as over-current, over-temperature, and short-circuit protection, ensuring reliable operation under various conditions.

LP2987IM-3.3 Features

• Fixed Output Voltage: The LP2987IM-3.3 provides a stable 3.3V output voltage, which is ideal for applications requiring a precise and consistent power supply.
• Low Dropout Voltage: With a maximum dropout voltage of 0.35V at 200mA, this regulator can operate efficiently even when the input voltage is close to the output voltage, minimizing power loss and improving overall efficiency.
• Protection Features: The regulator includes over-current, over-temperature, and short-circuit protection, ensuring robust and reliable performance in various operating conditions.
• Enable Control: The enable feature allows for dynamic control of the regulator's operation, providing flexibility in system design and power management.
• Low Quiescent Current: The regulator has a low quiescent current of 120 µA, making it suitable for low-power applications and minimizing power consumption in standby mode.
• High Power Supply Rejection Ratio (PSRR): The LP2987IM-3.3 offers a PSRR of 65dB at 1kHz, effectively filtering out noise from the input power supply and ensuring a clean output voltage.
• Moisture Sensitivity Level: The regulator has an MSL of 1 (unlimited), making it suitable for a wide range of manufacturing environments without the need for special handling.

LP2987IM-3.3 Applications

The LP2987IM-3.3 is well-suited for a variety of applications where a stable and efficient power supply is required. Some specific use cases include:

• Consumer Electronics: Ideal for powering microcontrollers, sensors, and other low-power devices in consumer electronics.
• Industrial Equipment: Suitable for industrial applications where a reliable and efficient power supply is critical.
• Telecommunications: Can be used in telecom equipment to provide stable power to critical components.
• Automotive Systems: Appropriate for automotive applications where a low dropout voltage and high PSRR are essential for maintaining stable power supply under varying conditions.

Conclusion of LP2987IM-3.3

The LP2987IM-3.3 from Texas Instruments is a versatile and reliable linear voltage regulator that offers a stable 3.3V output with a maximum current of 200mA. Its low dropout voltage, protection features, and low quiescent current make it an ideal choice for a wide range of applications, from consumer electronics to industrial equipment. Despite being marked as obsolete, the LP2987IM-3.3 remains a valuable component for designers seeking a robust and efficient power supply solution.