LP2951ACMMX-3.0 Equivalent & Substitute Parts

Part Overview

The LP2951ACMMX-3.0 is a linear voltage regulator IC from Texas Instruments, classified as a positive adjustable (fixed) output power management component. This 8-VSSOP surface mount device delivers 100mA output current with input voltage tolerance up to 30V and adjustable output voltage range from 1.235V to 29V. The main part carries an obsolete product status, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

LP2951ACMMX-3.0

Texas InstrumentsIn Stock: 4654LP2951ACMMX-3.0 Datasheet

Current PartRFQ

LP2951ACMMX-3.0/NOPB

Texas InstrumentsIn Stock: 4630LP2951ACMMX-3.0/NOPB Datasheet

DirectRFQ

LP2951ACMM-3.0/NOPB

Texas InstrumentsIn Stock: 3169LP2951ACMM-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 LP2951ACMMX-3.0 are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Substitutes (Texas Instruments): Parts that maintain identical electrical specifications and package configuration while differing only in packaging format (Tape & Reel vs. bulk). These substitutes are pin-compatible and functionally equivalent with no design changes required.

Parametric Equivalents (Texas Instruments): Parts sharing the same base product number (LP2951) with identical electrical performance specifications, output voltage configuration, and package dimensions. Differences exist only in packaging delivery method and RoHS compliance status.

Manufacturer Recommended Alternatives (onsemi): Parts from onsemi that maintain core electrical parameters including 100mA output current, 30V maximum input voltage, 8-MSOP package compatibility, and identical operating temperature range. These alternatives differ in output voltage type (fixed 3V vs. adjustable) and dropout voltage characteristics.

Key Parameters Determining Substitution:

• Output current rating (100mA)
• Maximum input voltage (30V)
• Package type (8-TSSOP/8-MSOP, 0.118" width)
• Operating temperature range (-40°C to 125°C)
• Surface mount mounting type
• Protection features (Over Current, Over Temperature)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required): LP2951ACMMX-3.0/NOPB, LP2951ACMM-3.0/NOPB, LP2951CMM-3.0/NOPB, and LP2951CMMX-3.0/NOPB are all active product variants from Texas Instruments with identical electrical specifications to the obsolete LP2951ACMMX-3.0. These parts are fully compatible and require no circuit modifications. Selection among these variants depends on packaging requirements: Tape & Reel for automated assembly or Cut Tape for manual handling. All active variants carry ROHS3 compliance, addressing regulatory requirements not met by the obsolete original part.

For Alternative Manufacturer Selection: LP2951ACDM-3.0RG from onsemi maintains electrical compatibility with 100mA output current, 30V maximum input voltage, and identical operating temperature range. This part differs in output voltage configuration (fixed 3V vs. adjustable) and features a lower dropout voltage of 0.45V compared to 0.6V. The onsemi variant is suitable only for applications requiring fixed 3V output and benefits from improved thermal performance due to reduced dropout voltage. This part carries AEC-Q100 automotive qualification.

Compliance Considerations: The original LP2951ACMMX-3.0 is RoHS non-compliant. All active Texas Instruments variants and the onsemi alternative are ROHS3 compliant, making them suitable for applications subject to RoHS regulations. Inventory availability is highest for LP2951CMM-3.0/NOPB (11,200 units) and LP2951CMMX-3.0/NOPB (7,100 units).

Frequently Asked Questions (FAQ)

Q: Can I use LP2951ACMMX-3.0/NOPB as a direct replacement for LP2951ACMMX-3.0? A: Yes. LP2951ACMMX-3.0/NOPB is electrically and functionally identical to the obsolete LP2951ACMMX-3.0. The only difference is packaging format (Tape & Reel vs. bulk) and RoHS3 compliance status. No circuit modifications are required.

Q: What is the difference between LP2951ACMM-3.0/NOPB and LP2951CMM-3.0/NOPB? A: Both parts are parametric equivalents with identical electrical specifications. The difference lies in packaging delivery method: LP2951ACMM-3.0/NOPB is supplied in Cut Tape & Digi-Reel format, while LP2951CMM-3.0/NOPB is supplied in Tape & Reel format. Select based on your assembly process requirements.

Q: Can I substitute the onsemi LP2951ACDM-3.0RG for the Texas Instruments LP2951ACMMX-3.0? A: Substitution is possible only if your application requires fixed 3V output. The onsemi part is not suitable for applications requiring adjustable output voltage. Both parts share identical 100mA output current, 30V maximum input voltage, and 8-MSOP package compatibility. The onsemi variant offers lower dropout voltage (0.45V vs. 0.6V).

Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed (Texas Instruments LP2951 variants and onsemi LP2951ACDM-3.0RG) are ROHS3 compliant. The original LP2951ACMMX-3.0 is RoHS non-compliant. For applications requiring RoHS compliance, select any of the active variants.

Q: What package types are available for the LP2951 series? A: Texas Instruments variants use 8-VSSOP package (0.118", 3.00mm width). The onsemi LP2951ACDM-3.0RG uses 8-MSOP package (0.118", 3.00mm width). Both package types are mechanically compatible for surface mount applications with identical pin pitch and thermal characteristics.

Q: Which substitute part has the highest inventory availability? A: LP2951CMM-3.0/NOPB has the highest inventory with 11,200 units in stock, followed by LP2951CMMX-3.0/NOPB with 7,100 units. Both are active products suitable for immediate procurement.