LP2953AIMX Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP2953AIMX is a linear voltage regulator IC from Texas Instruments designed for positive adjustable (fixed) output applications with 250mA output current capability in a 16-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The LP2953AIMX provides regulated output voltage from 1.23V to 29V with integrated protection features including over-current, over-temperature, and reverse polarity protection.

Substiute Parts

LP2953AIMX

Texas InstrumentsIn Stock: 5181LP2953AIMX Datasheet

Current PartRFQ

LP2953AIMX/NOPB

Texas InstrumentsIn Stock: 2009LP2953AIMX/NOPB Datasheet

DirectRFQ

LP2952AIMX/NOPB

Texas InstrumentsIn Stock: 5391LP2952AIMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2952IMX/NOPB

Texas InstrumentsIn Stock: 4186LP2952IMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2953IMX/NOPB

Texas InstrumentsIn Stock: 3058LP2953IMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2953AIMX are classified based on electrical and mechanical parameter equivalence:

Direct Manufacturer Substitute (Packaging Variant): LP2953AIMX/NOPB shares identical electrical specifications and package configuration with the main part. The primary distinction is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard).

Parametric Equivalents (Base Product Variants): LP2952AIMX/NOPB, LP2952IMX/NOPB, and LP2953IMX/NOPB are classified as parametric equivalents. These parts maintain all critical electrical parameters including voltage ranges (30V input max, 1.23V to 29V output), current ratings (250mA output, 170 µA quiescent), dropout voltage (0.8V @ 250mA), protection features, and package configuration (16-SOIC). The LP2952 series represents a different base product number within the same functional family, while the IMX variant indicates a different temperature or performance grade designation compared to the AIMX variant.

Key Parameters Determining Substitution: Output voltage range (1.23V to 29V), output current (250mA), input voltage maximum (30V), dropout voltage (0.8V @ 250mA), package type (16-SOIC), control features (Enable), and protection features (Over Current, Over Temperature, Reverse Polarity).

Parameter Comparison

Engineering Selection Recommendations

For New Designs: LP2953AIMX/NOPB, LP2952AIMX/NOPB, LP2952IMX/NOPB, and LP2953IMX/NOPB are all suitable selections. All substitute parts maintain active product status and ROHS3 compliance, providing long-term availability and regulatory alignment. The LP2953AIMX/NOPB represents the closest direct equivalent with identical base product designation and Tape & Reel packaging suitable for automated assembly.

For Existing Production (Obsolete Part Replacement): LP2953AIMX/NOPB is the primary recommendation due to identical electrical specifications and base product number (LP2953). This part provides direct functional compatibility with existing designs using the obsolete LP2953AIMX.

For Compliance-Critical Applications: All substitute parts (LP2953AIMX/NOPB, LP2952AIMX/NOPB, LP2952IMX/NOPB, LP2953IMX/NOPB) are ROHS3 compliant, whereas the original LP2953AIMX is RoHS non-compliant. Selection of any substitute part satisfies modern regulatory requirements.

Inventory Availability: LP2952AIMX/NOPB offers the highest inventory level (5300 Pcs), followed by LP2952IMX/NOPB (4156 Pcs), LP2953IMX/NOPB (2961 Pcs), and LP2953AIMX/NOPB (1900 Pcs).

Frequently Asked Questions (FAQ)

Q: Can LP2952 series parts directly replace LP2953 series parts? A: Yes. LP2952AIMX/NOPB and LP2952IMX/NOPB are parametric equivalents to the LP2953AIMX. All electrical specifications including voltage ranges, current ratings, dropout voltage, and protection features are identical. The primary difference is the base product designation (LP2952 vs. LP2953), which does not affect functional compatibility in applications requiring the specified electrical parameters.

Q: What is the difference between AIMX and IMX variants? A: The AIMX and IMX designations indicate different temperature or performance grade classifications within the Texas Instruments product line. Both variants maintain identical electrical specifications for voltage regulation, current output, and protection features. Selection between these variants depends on specific application requirements and availability.

Q: Is the /NOPB suffix significant for substitution? A: The /NOPB suffix indicates lead-free (no lead, no plumbum) packaging compliant with RoHS directives. This is a packaging designation that does not affect electrical functionality. Parts with /NOPB designation are ROHS3 compliant, whereas the original LP2953AIMX without this suffix is RoHS non-compliant.

Q: Are all substitute parts available in Tape & Reel packaging? A: Yes. All substitute parts listed (LP2953AIMX/NOPB, LP2952AIMX/NOPB, LP2952IMX/NOPB, LP2953IMX/NOPB) are supplied in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly processes.

Q: What are the key parameters that must match for substitution? A: Critical parameters for substitution include output voltage range (1.23V to 29V), maximum output current (250mA), maximum input voltage (30V), dropout voltage (0.8V @ 250mA), package type (16-SOIC), control features (Enable), and protection features (Over Current, Over Temperature, Reverse Polarity). All listed substitute parts maintain these specifications.

Q: Why is the original LP2953AIMX classified as obsolete? A: The LP2953AIMX is marked as obsolete by Texas Instruments, indicating discontinued production and limited long-term availability. Active substitute parts ensure continued supply for new designs and production requirements.