LP2954IMX Equivalent & Substitute Parts

Part Overview

The LP2954IMX is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 250mA output current with adjustable voltage regulation from 1.23V to 29V, making it suitable for general-purpose power management circuits requiring low dropout performance. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity.

Substiute Parts

LP2954IMX

Texas InstrumentsIn Stock: 2022LP2954IMX Datasheet

Current PartRFQ

LP2954AIMX/NOPB

National SemiconductorIn Stock: 49311LP2954AIMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2954IMX/NOPB

Texas InstrumentsIn Stock: 2375LP2954IMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2954IMX are identified based on strict parametric equivalence across the following criteria:

• Output configuration and type (Positive Adjustable)
• Number of regulators (1)
• Output current rating (250mA)
• Input voltage maximum (30V)
• Output voltage range (1.23V to 29V)
• Dropout voltage specification (0.8V @ 250mA)
• Quiescent current (150 µA)
• Operating temperature range (-40°C to 125°C)
• Package type (8-SOIC)
• Control and protection features (Enable, Over Current, Over Temperature, Reverse Polarity)

All identified substitutes maintain identical electrical specifications and mechanical compatibility with the original LP2954IMX.

Parameter Comparison

Engineering Selection Recommendations

The LP2954IMX is obsolete and should be replaced with an active equivalent for new designs and ongoing production. Two parametric equivalents are available:

LP2954AIMX/NOPB from National Semiconductor is an active part with identical electrical and mechanical specifications. This substitute maintains full compatibility with existing circuit designs.

LP2954IMX/NOPB from Texas Instruments is an active variant with identical electrical and mechanical specifications. This part carries ROHS3 compliance certification, making it suitable for applications with environmental regulatory requirements. Packaging is available in Cut Tape and Digi-Reel formats for production environments.

Selection between these substitutes should be based on supply chain availability, packaging requirements, and compliance certifications applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can LP2954AIMX/NOPB or LP2954IMX/NOPB be used as direct replacements for LP2954IMX?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output current ratings, voltage ranges, dropout characteristics, and 8-SOIC package dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between LP2954AIMX/NOPB and LP2954IMX/NOPB?

A: Both parts are electrically and mechanically identical. The primary differences are manufacturer (National Semiconductor vs. Texas Instruments), product status (both active), RoHS compliance (LP2954IMX/NOPB is ROHS3 compliant), and packaging format (LP2954IMX/NOPB offers Cut Tape and Digi-Reel options).

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use the 8-SOIC package with identical 0.154" width and 3.90mm dimensions. PCB footprints and assembly processes remain unchanged.

Q: Does the obsolete status of LP2954IMX affect circuit performance?

A: No. Obsolescence indicates the part is no longer manufactured, not a performance limitation. The electrical and functional characteristics remain valid. Active substitutes provide identical performance with continued availability.

Q: Which substitute should be selected for new designs?

A: LP2954IMX/NOPB is recommended for new designs due to active product status and ROHS3 compliance certification. LP2954AIMX/NOPB is an alternative if supply or cost considerations favor National Semiconductor sourcing.