LP2989IMX-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2989IMX-5.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity. This device operates across an input voltage range up to 16V and features integrated protection mechanisms including over-current, over-temperature, and short-circuit protection. The part is currently in Last Time Buy status, indicating end-of-life transition. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

LP2989IMX-5.0/NOPB

Texas InstrumentsIn Stock: 4899LP2989IMX-5.0/NOPB Datasheet

Current PartRFQ

TPS7A2650DRVR

Texas InstrumentsIn Stock: 17467TPS7A2650DRVR Datasheet

MFR RecommendedRFQ

LP2989AIMX-5.0/NOPB

Texas InstrumentsIn Stock: 819LP2989AIMX-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989IMX-5.0/NOPB are identified based on the following critical parameters that determine functional compatibility:

• Output voltage specification: 5V fixed output
• Output current capacity: 500mA minimum
• Input voltage tolerance: Maximum 16V or higher
• Operating temperature range: -40°C to 125°C
• Protection features: Over-current, over-temperature, and short-circuit protection
• RoHS3 compliance and MSL Level 1 rating
• Positive fixed output configuration with single regulator

Substitutes are grouped into two categories: parametric equivalents (identical electrical specifications and package) and manufacturer-recommended alternatives (enhanced performance characteristics with different packaging).

Parameter Comparison

Engineering Selection Recommendations

LP2989AIMX-5.0/NOPB is a parametric equivalent offering identical electrical specifications and package form factor to the LP2989IMX-5.0/NOPB. However, this part carries Obsolete product status, making it unsuitable for new designs or long-term supply assurance. This option is applicable only for direct replacement in existing inventory or legacy system maintenance where package compatibility is mandatory.

TPS7A2650DRVR is the manufacturer-recommended substitute from Texas Instruments with Active product status, ensuring ongoing availability and support. This device provides superior performance characteristics including reduced dropout voltage (0.33V versus 0.65V), significantly lower quiescent current (4.5 µA versus 175 µA), and enhanced PSRR performance. The TPS7A2650DRVR incorporates additional control features (Power Good output) and protection mechanisms (UVLO). The primary design consideration is package change from 8-SOIC to 6-WDFN Exposed Pad, requiring PCB layout modification. Input voltage tolerance increases to 18V, providing additional design margin. All regulatory compliance certifications (ROHS3, MSL Level 1) are maintained.

Frequently Asked Questions (FAQ)

Q: Can LP2989AIMX-5.0/NOPB be used as a direct replacement for LP2989IMX-5.0/NOPB?

A: Yes, from an electrical and mechanical standpoint. Both devices share identical output voltage (5V), current capacity (500mA), dropout voltage (0.65V @ 500mA), and 8-SOIC package specifications. However, LP2989AIMX-5.0/NOPB is classified as Obsolete, limiting its availability and making it unsuitable for new production designs.

Q: What are the key differences between LP2989IMX-5.0/NOPB and TPS7A2650DRVR?

A: Both maintain 5V fixed output and 500mA current capacity with identical operating temperature ranges and compliance certifications. TPS7A2650DRVR offers improved performance: dropout voltage is reduced by 50% (0.33V versus 0.65V), quiescent current is reduced by 97% (4.5 µA versus 175 µA), and PSRR is enhanced. The TPS7A2650DRVR includes Power Good output and UVLO protection. The package changes from 8-SOIC to 6-WDFN Exposed Pad, and maximum input voltage increases from 16V to 18V.

Q: Is PCB redesign required to use TPS7A2650DRVR as a substitute?

A: Yes. The package change from 8-SOIC to 6-WDFN Exposed Pad requires PCB layout modification. The footprint, pin count, and pin arrangement differ between these packages. Thermal management considerations also differ due to the exposed pad design of the WDFN package.

Q: Are all three parts RoHS3 compliant?

A: Yes. LP2989IMX-5.0/NOPB, LP2989AIMX-5.0/NOPB, and TPS7A2650DRVR are all ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute should be selected for new product designs?

A: TPS7A2650DRVR is the appropriate choice for new designs. It carries Active product status, ensuring long-term availability and manufacturer support. The enhanced performance characteristics (lower dropout voltage and quiescent current) provide additional design margin and improved efficiency.

Q: What is the impact of the lower quiescent current in TPS7A2650DRVR?

A: The TPS7A2650DRVR quiescent current of 4.5 µA versus 175 µA in LP2989IMX-5.0/NOPB results in significantly reduced standby power consumption. This is particularly beneficial in battery-powered or low-power applications where quiescent current directly impacts system efficiency and battery life.