LP2989IMX-2.5/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IMX-2.5/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output applications with 500mA current capability in an 8-SOIC surface mount package. This device is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity. The LP2989IMX-2.5/NOPB provides fundamental power management functionality with integrated protection features including over-current, over-temperature, and short-circuit protection, along with an enable control input.

Substiute Parts

LP2989IMX-2.5/NOPB

Texas InstrumentsIn Stock: 758LP2989IMX-2.5/NOPB Datasheet

Current PartRFQ

TPS7A2625DRVR

Texas InstrumentsIn Stock: 3628TPS7A2625DRVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2989IMX-2.5/NOPB is determined by the following critical parameters that must remain compatible:

• Fixed output voltage of 2.5V
• Minimum output current capability of 500mA
• Positive output configuration
• Single regulator output
• Operating temperature range of -40°C to 125°C
• Surface mount technology
• RoHS3 compliance
• Enable control functionality

The TPS7A2625DRVR qualifies as a manufacturer-recommended substitute based on matching these core electrical and functional specifications. While the substitute employs a different package format (6-WSON versus 8-SOIC), it maintains electrical equivalence for the specified output voltage and current parameters.

Parameter Comparison

Engineering Selection Recommendations

The TPS7A2625DRVR is the active equivalent for the obsolete LP2989IMX-2.5/NOPB. Both devices are manufactured by Texas Instruments and maintain ROHS3 compliance with unlimited moisture sensitivity rating. The substitute provides superior electrical performance characteristics including lower dropout voltage (0.33V versus 0.65V), significantly reduced quiescent current (4.5 µA versus 175 µA), and higher input voltage tolerance (18V versus 16V). The TPS7A2625DRVR adds Power Good output and UVLO (Under-Voltage Lock-Out) protection compared to the original device.

PCB layout modifications are required due to package format change from 8-SOIC to 6-WSON (2x2). The substitute device includes an exposed pad for enhanced thermal management, which may improve thermal performance in the application. Pin-to-pin compatibility does not exist; schematic and layout redesign is necessary for implementation.

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2625DRVR directly replace the LP2989IMX-2.5/NOPB without PCB modifications?

A: No. The TPS7A2625DRVR uses a 6-WSON (2x2) package while the LP2989IMX-2.5/NOPB uses an 8-SOIC package. Pin assignments differ, requiring schematic and PCB layout redesign.

Q: Are the output voltage and current specifications identical between these devices?

A: Yes. Both devices provide fixed 2.5V output at 500mA maximum output current, meeting the core functional requirements for substitution.

Q: What are the key advantages of the TPS7A2625DRVR substitute?

A: The TPS7A2625DRVR offers lower dropout voltage (0.33V versus 0.65V), substantially lower quiescent current (4.5 µA versus 175 µA), higher maximum input voltage (18V versus 16V), and additional control features including Power Good output and UVLO protection.

Q: Do both devices support the same operating temperature range?

A: Yes. Both the LP2989IMX-2.5/NOPB and TPS7A2625DRVR operate across -40°C to 125°C, maintaining compatibility for temperature-dependent applications.

Q: Are there compliance or certification differences between these parts?

A: Both devices are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. No compliance barriers exist for substitution.

Q: What is the significance of the exposed pad on the TPS7A2625DRVR?

A: The exposed pad on the 6-WSON package provides direct thermal connection to the PCB, improving heat dissipation compared to the 8-SOIC package without exposed pad.