LP2951ACMX Equivalent & Substitute Parts

Part Overview

The LP2951ACMX is a linear voltage regulator IC from Texas Instruments, classified as a positive adjustable (fixed) output power management IC (PMIC). This 8-SOIC surface mount device delivers 100mA output current with input voltage capability up to 30V and adjustable output voltage range from 1.235V to 29V. The main part carries Last Time Buy status, indicating end-of-life production. Equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain flexibility for applications requiring this regulator topology and electrical performance.

Substiute Parts

LP2951ACMX

Texas InstrumentsIn Stock: 18184LP2951ACMX Datasheet

Current PartRFQ

LP2951ACMX/NOPB

Texas InstrumentsIn Stock: 27464LP2951ACMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2951CMX/NOPB

Texas InstrumentsIn Stock: 57705LP2951CMX/NOPB Datasheet

Parametric EquivalentRFQ

LP2951-02YM

Microchip TechnologyIn Stock: 36465LP2951-02YM Datasheet

MFR RecommendedRFQ

LP2951-02YM-TR

Microchip TechnologyIn Stock: 20468LP2951-02YM-TR Datasheet

MFR RecommendedRFQ

LP2951-03YM

Microchip TechnologyIn Stock: 15490LP2951-03YM Datasheet

MFR RecommendedRFQ

LP2951-03YM-TR

Microchip TechnologyIn Stock: 3460LP2951-03YM-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP2951ACMX is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Output Configuration: Positive
• Output Type: Adjustable (Fixed)
• Number of Regulators: 1
• Voltage - Input (Max): 30V
• Voltage - Output (Min/Fixed): 1.235V (5V) or 1.24V (5V)
• Voltage - Output (Max): 29V
• Current - Output: 100mA
• Voltage Dropout (Max): 0.6V @ 100mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories: parametric equivalents (identical electrical and mechanical specifications) and manufacturer-recommended alternatives (functionally equivalent with minor specification variations permitted by design).

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments Parametric Equivalents (Direct Substitutes):

LP2951ACMX/NOPB and LP2951CMX/NOPB are parametric equivalents with Active product status. These parts maintain identical electrical specifications and mechanical packaging to the main part. LP2951ACMX/NOPB carries higher inventory (27395 Pcs) compared to the main part (18078 Pcs). LP2951CMX/NOPB offers the highest inventory availability (57671 Pcs) among all listed alternatives. Both are ROHS3 compliant with MSL 1 rating and are suitable for direct substitution in new designs or production continuity.

Microchip Technology Manufacturer-Recommended Alternatives:

LP2951-02YM, LP2951-02YM-TR, LP2951-03YM, and LP2951-03YM-TR are Microchip Technology equivalents with Active product status. These parts maintain all critical electrical parameters including 30V maximum input voltage, 100mA output current, 0.6V maximum dropout voltage, and -40°C to 125°C operating temperature range. Minor specification differences include quiescent current of 150 µA (versus 120 µA in Texas Instruments versions) and the addition of Error Flag control feature. Protection features differ: Microchip versions do not specify Over Current, Over Temperature, or Short Circuit protection in the provided data. All Microchip alternatives are ROHS3 compliant with MSL 1 rating.

Packaging Considerations:

Texas Instruments parts are supplied in Cut Tape (CT) & Digi-Reel® packaging. Microchip alternatives are available in both Tube (LP2951-02YM, LP2951-03YM) and Cut Tape (CT) & Digi-Reel® (LP2951-02YM-TR, LP2951-03YM-TR) packaging options. Selection should align with assembly line requirements and tape reel specifications.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly and storage protocols. REACH status is Unaffected for all parts, and ECCN classification remains EAR99 across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can LP2951ACMX/NOPB be used as a direct replacement for LP2951ACMX?

A: Yes. LP2951ACMX/NOPB is a parametric equivalent with identical electrical and mechanical specifications. The only difference is product status (Active versus Last Time Buy) and packaging designation (/NOPB indicates no lead-free plating). Both are Texas Instruments parts in 8-SOIC package with 100mA output, 30V maximum input, and -40°C to 125°C operating range.

Q: What is the difference between Texas Instruments and Microchip Technology versions?

A: Texas Instruments versions (LP2951ACMX, LP2951ACMX/NOPB, LP2951CMX/NOPB) specify quiescent current of 120 µA and include Over Current, Over Temperature, and Short Circuit protection features. Microchip versions (LP2951-02YM, LP2951-02YM-TR, LP2951-03YM, LP2951-03YM-TR) specify quiescent current of 150 µA and add Error Flag control feature. All other electrical parameters remain identical. Both manufacturers' parts are suitable for the same applications.

Q: Does packaging type affect electrical performance?

A: No. Packaging type (Cut Tape & Digi-Reel® versus Tube) affects only handling, storage, and assembly line compatibility. Electrical performance and mechanical package dimensions (8-SOIC, 0.154" width) remain identical. Selection should be based on assembly equipment requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (LP2951ACMX/NOPB, LP2951CMX/NOPB, LP2951-02YM, LP2951-02YM-TR, LP2951-03YM, LP2951-03YM-TR) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the significance of the Last Time Buy status on LP2951ACMX?

A: Last Time Buy status indicates the main part has reached end-of-life production. Existing inventory (18078 Pcs) represents the final available stock. For long-term supply chain continuity, designs should transition to Active status alternatives such as LP2951ACMX/NOPB, LP2951CMX/NOPB, or Microchip equivalents.

Q: Can I mix Texas Instruments and Microchip parts in the same production run?

A: Yes, provided the application tolerates the 30 µA difference in quiescent current (120 µA versus 150 µA) and the absence of specified protection features in Microchip versions. All parts share identical output voltage range (1.235V/1.24V to 29V), dropout voltage (0.6V @ 100mA), and operating temperature (-40°C to 125°C). Verify application power budget and thermal requirements before mixing manufacturers.

Q: What does the -02YM and -03YM designation indicate?

A: The -02YM and -03YM designations are Microchip internal part numbering conventions. Both versions maintain identical electrical specifications and are functionally equivalent. Selection between them should be based on packaging preference (Tube versus Cut Tape & Digi-Reel®) and inventory availability.