LP2951ACMM-3.0 Equivalent & Substitute Parts

Part Overview

The LP2951ACMM-3.0 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This positive adjustable (fixed) output regulator delivers 100mA with an 8-VSSOP package configuration. The main part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing production and maintenance applications.

Substiute Parts

LP2951ACMM-3.0

Texas InstrumentsIn Stock: 4749LP2951ACMM-3.0 Datasheet

Current PartRFQ

LP2951ACMM-3.0/NOPB

Texas InstrumentsIn Stock: 3169LP2951ACMM-3.0/NOPB Datasheet

DirectRFQ

LP2951ACMMX-3.0/NOPB

Texas InstrumentsIn Stock: 4630LP2951ACMMX-3.0/NOPB Datasheet

Parametric EquivalentRFQ

LP2951CMM-3.0/NOPB

Texas InstrumentsIn Stock: 11276LP2951CMM-3.0/NOPB Datasheet

Parametric EquivalentRFQ

LP2951CMMX-3.0/NOPB

Texas InstrumentsIn Stock: 7160LP2951CMMX-3.0/NOPB Datasheet

Parametric EquivalentRFQ

LP2951ACDM-3.0R2G

onsemiIn Stock: 1037LP2951ACDM-3.0R2G Datasheet

MFR RecommendedRFQ

LP2951ACDM-3.0RG

onsemiIn Stock: 4937LP2951ACDM-3.0RG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2951ACMM-3.0 are classified based on the following critical parameters that determine functional equivalence:

Core Electrical Parameters:

• Output configuration (Positive)
• Output type (Adjustable or Fixed)
• Current output rating (100mA)
• Voltage input maximum (30V)
• Voltage output range (1.235V to 29V or fixed 3V)
• Voltage dropout specification (0.6V @ 100mA or lower)
• Operating temperature range (-40°C ~ 125°C)

Package & Mechanical Parameters:

• Package type (8-VSSOP or 8-MSOP equivalent)
• Mounting type (Surface Mount)
• Physical dimensions (0.118", 3.00mm Width)

Compliance & Status:

• RoHS3 compliance
• Product status (Active preferred over Last Time Buy)

Substitutes are grouped into two categories: Direct Manufacturer Equivalents (same manufacturer, identical electrical specifications, packaging variation) and Manufacturer Recommended Alternatives (different manufacturer, functionally equivalent with minor specification differences).

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalents (Texas Instruments LP2951 Series):

The LP2951ACMM-3.0/NOPB, LP2951ACMMX-3.0/NOPB, LP2951CMM-3.0/NOPB, and LP2951CMMX-3.0/NOPB are all Active status parts from Texas Instruments with identical electrical specifications to the main part. These represent the primary substitution path. The differences between these parts are limited to packaging format (Tape & Reel versus Cut Tape) and internal manufacturing variations (indicated by the X suffix). All maintain full compatibility with the original design. LP2951CMM-3.0/NOPB offers the highest inventory availability at 11,200 pieces.

Manufacturer Recommended Alternative (onsemi LP2951ACDM-3.0RG):

The LP2951ACDM-3.0RG from onsemi is an Active status part with the same base product number (LP2951) and identical current output, quiescent current, and operating temperature range. This part differs in that it is specified as Fixed output type (3V only) rather than Adjustable, and features improved voltage dropout performance (0.45V @ 100mA versus 0.6V). The package designation changes from 8-VSSOP to 8-MSOP, though both are physically equivalent 8-pin surface mount packages with identical dimensions. This alternative is suitable only for applications requiring fixed 3V output.

All substitute parts maintain ROHS3 compliance and are suitable for the same operating temperature range. Selection should prioritize Active status parts over the Last Time Buy main part to ensure long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can LP2951CMM-3.0/NOPB be used as a direct replacement for LP2951ACMM-3.0?

A: Yes. Both parts share identical electrical specifications including output type (Adjustable/Fixed), current rating (100mA), voltage parameters, and operating temperature range. The primary difference is product status (Active versus Last Time Buy) and packaging format. The CMM variant is recommended for new designs due to its Active status and higher inventory availability.

Q: What is the difference between LP2951ACMMX-3.0/NOPB and LP2951ACMM-3.0/NOPB?

A: Both parts are electrically identical. The X suffix indicates a manufacturing variation or internal design change. Both are Active status parts from Texas Instruments with the same electrical performance, package type (8-VSSOP), and compliance certifications. Selection between these can be based on inventory availability or supplier preference.

Q: Is the onsemi LP2951ACDM-3.0RG a suitable substitute?

A: The onsemi part is functionally equivalent for applications requiring fixed 3V output. It provides superior voltage dropout performance (0.45V versus 0.6V @ 100mA). However, it is specified as Fixed output only, making it unsuitable for designs requiring adjustable output voltage. The package changes from 8-VSSOP to 8-MSOP, though both are physically equivalent surface mount packages.

Q: What packaging options are available for LP2951 substitutes?

A: Texas Instruments LP2951 variants are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel formats. The onsemi LP2951ACDM-3.0RG is supplied in Tape & Reel format. All variants use 8-pin surface mount packages (8-VSSOP or 8-MSOP) with identical physical dimensions (0.118", 3.00mm Width). Package selection depends on assembly process requirements and supplier availability.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory requirements of the original LP2951ACMM-3.0.

Q: Which substitute offers the best inventory availability?

A: LP2951CMM-3.0/NOPB from Texas Instruments currently has the highest inventory at 11,200 pieces, followed by LP2951CMMX-3.0/NOPB at 7,100 pieces. Both are Active status parts with identical electrical specifications to the main part.