National Semiconductor

LP2989AIM-5.0

LP2989AIM-5.0 Description

The LP2989AIM-5.0 is a high-performance, low-dropout linear voltage regulator designed by National Semiconductor. This regulator is specifically tailored for applications requiring low power consumption and high efficiency. With a fixed output voltage of 5V and a maximum input voltage of 16V, the LP2989AIM-5.0 can deliver up to 500mA of output current while maintaining a low quiescent current of 175 µA. The regulator's dropout voltage is a mere 0.65V at 500mA, ensuring efficient operation even at low input-to-output voltage differentials.

LP2989AIM-5.0 Features

• Low Quiescent Current: The LP2989AIM-5.0 boasts a low quiescent current of 175 µA, making it ideal for battery-powered and low-power applications.
• HighRR PS: With a power supply rejection ratio (PSRR) of 60dB at 1kHz, the regulator effectively filters out noise from the input supply, ensuring a clean and stable output voltage.
• Fixed Output Voltage: The regulator provides a fixed output voltage of 5V, simplifying design and eliminating the need for external voltage-setting resistors.
• Low Dropout Voltage: The maximum dropout voltage of 0.65V at 500mA ensures high efficiency, even when the input voltage is close to the output voltage.
• Protection Features: The LP2989AIM-5.0 includes over-current, over-temperature, and short-circuit protection, safeguarding the device and downstream components from potential damage.
• Enable Control Feature: The regulator features an enable control, allowing for dynamic power management and further reducing power consumption when the regulator is not in use.
• Surface Mount Package: The surface mount package type facilitates easy integration into compact and high-density PCB designs.
• Moisture Sensitivity Level: The moisture sensitivity level is vendor-defined, ensuring reliability in various environmental conditions.

LP2989AIM-5.0 Applications

The LP2989AIM-5.0 is well-suited for a variety of applications where low power consumption, high efficiency, and low noise are critical. Some specific use cases include:

• Battery-Powered Devices: Ideal for portable electronics such as smartphones, tablets, and wearable devices where battery life and efficiency are paramount.
• Low-Power Embedded Systems: Suitable for embedded systems in IoT devices, sensors, and microcontrollers that require stable power with minimal power draw.
• Medical Devices: The low noise and high PSRR make it suitable for medical equipment where signal integrity is crucial.
• Industrial Control Systems: The regulator's robust protection features and high efficiency make it a reliable choice for industrial applications with stringent power requirements.

Conclusion of LP2989AIM-5.0

The LP2989AIM-5.0 stands out as a versatile and efficient linear voltage regulator, offering a compelling combination of low quiescent current, high PSRR, and low dropout voltage. Its fixed 5V output comprehensive and protection features make it a reliable choice for a wide range of applications. Whether powering battery-operated devices, embedded systems, or sensitive medical equipment, the LP2989AIM-5.0 delivers exceptional performance and reliability. Its surface mount package and enable control feature further enhance its suitability for modern, space-constrained designs. For engineers seeking a high-performance, low-power regulator, the LP2989AIM-5.0 is an excellent choice.