Texas Instruments

LP2989AIMX-3.3  

Linear & Switching Voltage Regulators

LP2989AIMX-3.3 Description

The LP2989AIMX-3.3 from Texas Instruments is a fixed-output, low-dropout (LDO) linear voltage regulator designed to deliver a stable 3.3V output at up to 500mA of load current. With a wide input voltage range of up to 16V, this regulator is well-suited for applications requiring efficient voltage conversion from higher input sources. The device features a low dropout voltage of 0.65V at 500mA, ensuring reliable operation even with marginal input voltages. Its low quiescent current (175 µA) and enable control make it ideal for power-sensitive designs. Although marked as obsolete, it remains a robust choice for legacy systems due to its high PSRR (60dB at 1kHz) and comprehensive protection features, including over-current, over-temperature, and short-circuit safeguards. Packaged in an 8-pin SOIC and compliant with RoHS3, it balances performance with compactness.

LP2989AIMX-3.3 Features

• Fixed 3.3V Output: Precision-regulated voltage for stable power delivery.
• High Input Voltage Tolerance: Supports up to 16V, accommodating diverse power sources.
• Low Dropout Voltage: 0.65V @ 500mA minimizes power loss.
• Low Quiescent Current: 175 µA enhances efficiency in battery-operated devices.
• Enable Pin: Allows for external control of regulator operation.
• Robust Protection: Integrated over-current, over-temperature, and short-circuit protection.
• High PSRR: 60dB at 1kHz ensures noise suppression in sensitive circuits.
• Compact Package: 8-SOIC surface-mount design for space-constrained applications.
• Compliance: RoHS3 and REACH Unaffected, meeting environmental standards.

LP2989AIMX-3.3 Applications

• Battery-Powered Devices: Ideal for portable electronics due to low Iq and dropout.
• Industrial Control Systems: Reliable performance in harsh environments with wide input range.
• Automotive Electronics: Suitable for infotainment or sensors with its high PSRR.
• Embedded Systems: Provides stable power to microcontrollers, FPGAs, or sensors.
• Legacy Equipment Maintenance: A dependable choice for obsolete system repairs.

Conclusion of LP2989AIMX-3.3

The LP2989AIMX-3.3 is a high-performance LDO regulator offering a blend of low power consumption, robust protection, and compact packaging. While obsolete, its high PSRR, enable control, and wide input range make it a strong candidate for battery-powered, industrial, and automotive applications. Engineers seeking a reliable 3.3V regulator with proven Texas Instruments quality will find this IC a practical solution, particularly in legacy or efficiency-critical designs.

LP2989AIMX-3.3 Documents

Download datasheets and manufacturer documentation for LP2989AIMX-3.3

Datasheets :

LP2989 Datasheet