LP2989IM-5.0 Equivalent & Substitute Parts

Part Overview

The LP2989IM-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity in an 8-SOIC surface mount package. This part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing production, maintenance, and design continuity. The LP2989IM-5.0 provides regulated 5V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable low-voltage power distribution.

Substiute Parts

LP2989IM-5.0

Texas InstrumentsIn Stock: 3366LP2989IM-5.0 Datasheet

Current PartRFQ

REG103UA-5

Texas InstrumentsIn Stock: 1799REG103UA-5 Datasheet

MFR RecommendedRFQ

LP2989AIM-5.0/NOPB

Texas InstrumentsIn Stock: 3040LP2989AIM-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2989IM-5.0 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

• Fixed output voltage of 5V
• Minimum 500mA output current capability
• Maximum input voltage rating of 15V or higher
• 8-SOIC surface mount package with 0.154" (3.90mm) width
• Enable control feature
• Over-current and over-temperature protection

Two substitute parts meet these criteria with varying compliance and performance characteristics:

REG103UA-5 qualifies as a manufacturer-recommended substitute with improved electrical performance characteristics, though with reduced operating temperature range and different quiescent current specifications.

LP2989AIM-5.0/NOPB qualifies as a parametric equivalent with identical electrical specifications to the main part, differing primarily in product status and RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

REG103UA-5 is designated as the manufacturer-recommended substitute. This part maintains full electrical compatibility for 5V 500mA applications while offering improved voltage dropout performance (0.28V vs. 0.65V). REG103UA-5 is ROHS3 compliant and carries Last Time Buy status, providing a clear upgrade path from the obsolete LP2989IM-5.0. The reduced operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C) must be evaluated against specific application requirements. REG103UA-5 lacks short-circuit protection present in the original part.

LP2989AIM-5.0/NOPB is a parametric equivalent offering identical electrical specifications and protection features to LP2989IM-5.0, including the full -40°C ~ 125°C operating range and short-circuit protection. This part is ROHS3 compliant with Last Time Buy status. Selection of LP2989AIM-5.0/NOPB is appropriate when full parameter matching and extended temperature operation are required.

Both substitutes are available in identical 8-SOIC packaging and are direct pin-compatible replacements. Product status indicates both alternatives are in Last Time Buy phase, requiring procurement planning for long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can REG103UA-5 replace LP2989IM-5.0 in all applications?

A: REG103UA-5 is electrically compatible for 5V 500mA output applications. However, the operating temperature range is reduced to -40°C ~ 85°C compared to the original -40°C ~ 125°C. Applications requiring operation above 85°C must use LP2989AIM-5.0/NOPB. Additionally, REG103UA-5 does not include short-circuit protection.

Q: What is the difference between REG103UA-5 and LP2989AIM-5.0/NOPB?

A: Both parts provide 5V 500mA output in identical 8-SOIC packages. LP2989AIM-5.0/NOPB maintains all original electrical specifications including 0.65V dropout voltage, 175 µA quiescent current, and full -40°C ~ 125°C temperature range with short-circuit protection. REG103UA-5 offers superior dropout performance (0.28V) and lower quiescent current (0.7 mA) but operates only to 85°C and lacks short-circuit protection.

Q: Are these parts pin-compatible with LP2989IM-5.0?

A: Yes. Both REG103UA-5 and LP2989AIM-5.0/NOPB use identical 8-SOIC packaging with 0.154" (3.90mm) width, providing direct pin-compatible replacement without PCB modifications.

Q: What is the significance of RoHS compliance status?

A: LP2989IM-5.0 is RoHS non-compliant. Both substitute parts (REG103UA-5 and LP2989AIM-5.0/NOPB) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and procurement.

Q: Why are both substitutes in Last Time Buy status?

A: Last Time Buy status indicates these parts are being phased out by the manufacturer. Procurement planning is necessary to secure adequate inventory for production continuity. Current stock levels are available: REG103UA-5 (1745 Pcs), LP2989AIM-5.0/NOPB (3026 Pcs).