LP2953IMX Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2953IMX is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications with 250mA current capacity in a 16-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and production continuity. The LP2953IMX shares core electrical specifications with active variants and related product lines that maintain identical functional parameters while offering improved availability and compliance status.

Substiute Parts

LP2953IMX

Texas InstrumentsIn Stock: 5289LP2953IMX Datasheet

Current PartRFQ

LP2953IMX/NOPB

Texas InstrumentsIn Stock: 3058LP2953IMX/NOPB Datasheet

DirectRFQ

LP2952AIMX/NOPB

Texas InstrumentsIn Stock: 5391LP2952AIMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2952IMX/NOPB

Texas InstrumentsIn Stock: 4186LP2952IMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2953AIMX/NOPB

Texas InstrumentsIn Stock: 2009LP2953AIMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2953IMX is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Output configuration (Positive)
• Output type (Adjustable/Fixed)
• Voltage specifications (Input Max: 30V, Output Min/Fixed: 1.23V/5V, Output Max: 29V)
• Current ratings (Output: 250mA, Quiescent: 170 µA, Supply Max: 33 mA)
• Dropout voltage (0.8V @ 250mA)
• Control and protection features (Enable, Over Current, Over Temperature, Reverse Polarity)
• Operating temperature range (-40°C ~ 125°C)

Mechanical Equivalence Criteria:

• Package type: 16-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Moisture sensitivity: MSL 1 (Unlimited)

All substitute parts listed maintain identical electrical and mechanical specifications. The LP2953IMX can be directly replaced with LP2953IMX/NOPB (active status variant), LP2953AIMX/NOPB, LP2952IMX/NOPB, and LP2952AIMX/NOPB without circuit modification or re-qualification.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete LP2953IMX, direct substitution with LP2953IMX/NOPB is the primary recommendation. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance certification.

LP2953AIMX/NOPB provides an alternative within the LP2953 product line with equivalent performance characteristics and active status. Both LP2952IMX/NOPB and LP2952AIMX/NOPB represent parametric equivalents from the LP2952 product family, offering identical functional specifications with active availability and ROHS3 compliance.

All substitute parts are qualified for direct PCB replacement without circuit redesign. Selection between LP2953 and LP2952 variants should be based on inventory availability and procurement lead times, as electrical performance is identical across all listed alternatives.

Frequently Asked Questions (FAQ)

Q: Can LP2953IMX be replaced with LP2952IMX/NOPB? A: Yes. Both parts share identical electrical specifications including voltage ratings (30V input max, 1.23V/5V/29V output), current capacity (250mA output), dropout voltage (0.8V @ 250mA), and protection features. Both use 16-SOIC packaging. Direct substitution is valid without circuit modification.

Q: What is the difference between LP2953AIMX/NOPB and LP2953IMX/NOPB? A: Both parts are electrically and mechanically identical. The primary differences are product status (both active), packaging format (both Tape & Reel), and inventory availability. Selection can be based on procurement lead time and stock levels.

Q: Is the LP2953IMX/NOPB a direct replacement for the obsolete LP2953IMX? A: Yes. The LP2953IMX/NOPB is the active production variant of the LP2953IMX with identical electrical and mechanical specifications. It includes ROHS3 compliance and Tape & Reel packaging for production environments.

Q: Are there any compatibility concerns when switching between LP2953 and LP2952 variants? A: No compatibility concerns exist. All electrical parameters, control features, protection mechanisms, and package specifications are identical. Pin configuration and circuit interface remain unchanged.

Q: What packaging formats are available for these substitute parts? A: The LP2953IMX is supplied in standard packaging. All substitute parts (LP2953IMX/NOPB, LP2953AIMX/NOPB, LP2952IMX/NOPB, LP2952AIMX/NOPB) are available in Tape & Reel (TR) format suitable for automated assembly processes.

Q: Do all substitute parts meet RoHS compliance requirements? A: The original LP2953IMX is RoHS non-compliant. All active substitute parts (LP2953IMX/NOPB, LP2953AIMX/NOPB, LP2952IMX/NOPB, LP2952AIMX/NOPB) are ROHS3 compliant, meeting current environmental and regulatory standards.