Texas Instruments

LP2989IMX-3.3  

Linear & Switching Voltage Regulators

LP2989IMX-3.3 Description

The LP2989IMX-3.3 is a fixed output linear voltage regulator designed by Texas Instruments. This regulator is part of the LP2989 series and is specifically configured to provide a stable 3.3V output voltage with a maximum output current of 500mA. It is housed in an 8-pin SOIC package, making it suitable for surface mount applications. The regulator is designed to operate with an input voltage range up to 16V, ensuring compatibility with a wide variety of power sources.

The LP2989IMX-3.3 features a low dropout voltage of 0.65V at 500mA, which is advantageous for applications where the input voltage is close to the output voltage. This characteristic minimizes power dissipation and improves efficiency. Additionally, the regulator has a low quiescent current of 175 µA, making it suitable for low-power applications where energy efficiency is critical.

LP2989IMX-3.3 Features

• Output Type: Fixed at 3.3V, ensuring a stable and reliable power supply for various electronic circuits.
• Input Voltage Range: Up to 16V, providing flexibility in power source selection.
• Output Current: Capable of delivering up to 500mA, suitable for a wide range of applications requiring moderate current levels.
• Low Dropout Voltage: 0.65V at 500mA, which enhances efficiency and reduces power loss.
• Low Quiescent Current: 175 µA, ideal for battery-powered and low-power applications.
• Enable Control Feature: Allows for dynamic control of the regulator's operation, enabling power savings and efficient power management.
• Protection Features: Over current, over temperature, and short circuit protection ensure robustness and reliability in various operating conditions.
• Mounting Type: Surface mount, compatible with modern PCB assembly processes.
• Package: Tape & Reel (TR), facilitating automated assembly and handling.
• Compliance: ROHS3 compliant and REACH unaffected, ensuring environmental and regulatory standards are met.

LP2989IMX-3.3 Applications

The LP2989IMX-3.3 is well-suited for a variety of applications where a stable 3.3V power supply is required. Some specific use cases include:

• Embedded Systems: Providing a reliable power source for microcontrollers, sensors, and other low-power components.
• Consumer Electronics: Ideal for portable devices and gadgets that require efficient power management.
• Industrial Applications: Suitable for control systems and instrumentation where stability and reliability are paramount.
• Telecommunications: Powering various modules and components in communication equipment.
• Automotive: Used in vehicle electronics for applications requiring a stable and efficient power supply.

Conclusion of LP2989IMX-3.3

The LP2989IMX-3.3 is a versatile and efficient linear voltage regulator that offers a stable 3.3V output with a maximum current of 500mA. Its low dropout voltage and low quiescent current make it an excellent choice for low-power and battery-operated applications. The inclusion of enable control and comprehensive protection features further enhances its usability and reliability. While the product is now obsolete, it remains a reliable option for applications where its specific attributes are required. For new designs, engineers may consider exploring alternative models with similar or enhanced features from Texas Instruments' extensive portfolio of linear and switching voltage regulators.

LP2989IMX-3.3 Documents

Download datasheets and manufacturer documentation for LP2989IMX-3.3

Datasheets :

LP2989 Datasheet      

PCN Design/Specification :

Copper Wire Update 12/Aug/2015