LP2951CD-3.3R2G Equivalent & Substitute Parts

Part Overview

The LP2951CD-3.3R2G is a linear voltage regulator IC from onsemi, delivering a fixed 3.3V output at 100mA in an 8-SOIC surface mount package. This device is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, output configuration, and mechanical compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

LP2951CD-3.3R2G

onsemiIn Stock: 20321LP2951CD-3.3R2G Datasheet

Current PartRFQ

LP2951ACD-3.3R2G

onsemiIn Stock: 2633LP2951ACD-3.3R2G Datasheet

Parametric EquivalentRFQ

NCV2951ACD3.3R2G

onsemiIn Stock: 2600NCV2951ACD3.3R2G Datasheet

Parametric EquivalentRFQ

LP2951ACM-3.3/NOPB

Texas InstrumentsIn Stock: 3307LP2951ACM-3.3/NOPB Datasheet

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LP2951ACMX-3.3/NOPB

Texas InstrumentsIn Stock: 163442LP2951ACMX-3.3/NOPB Datasheet

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LP2951CM-3.3/NOPB

Texas InstrumentsIn Stock: 26178LP2951CM-3.3/NOPB Datasheet

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LP2951CMX-3.3/NOPB

Texas InstrumentsIn Stock: 30192LP2951CMX-3.3/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2951CD-3.3R2G are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents share identical electrical specifications and package configuration:

• LP2951ACD-3.3R2G (onsemi, Cut Tape & Digi-Reel packaging)
• NCV2951ACD3.3R2G (onsemi, Tape & Reel packaging, automotive grade with AEC-Q100 qualification)

Similar Parts maintain core electrical compatibility (100mA output, 3.3V fixed output, 8-SOIC package) but originate from Texas Instruments with adjustable output type capability:

• LP2951ACM-3.3/NOPB (Tube packaging)
• LP2951ACMX-3.3/NOPB (Cut Tape & Digi-Reel packaging)
• LP2951CM-3.3/NOPB (Tube packaging)
• LP2951CMX-3.3/NOPB (Cut Tape & Digi-Reel packaging)

Substitution eligibility is determined by matching: output configuration (positive), output type (fixed at 3.3V), current rating (100mA), maximum input voltage (30V), package type (8-SOIC), and operating temperature range (-40°C ~ 125°C).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitution): LP2951ACD-3.3R2G and NCV2951ACD3.3R2G are direct parametric equivalents to LP2951CD-3.3R2G. Both maintain identical electrical performance and 8-SOIC package compatibility. NCV2951ACD3.3R2G includes automotive-grade qualification (AEC-Q100), suitable for applications requiring automotive compliance. Packaging differences (Cut Tape & Digi-Reel vs. Tape & Reel) do not affect electrical performance and depend on procurement and assembly requirements.

Similar Parts (Cross-Manufacturer Substitution): Texas Instruments LP2951 variants (LP2951ACM-3.3/NOPB, LP2951ACMX-3.3/NOPB, LP2951CM-3.3/NOPB, LP2951CMX-3.3/NOPB) are functionally compatible substitutes. These devices are classified as Adjustable (Fixed) output type but are configured for 3.3V fixed output operation. All maintain 100mA output current, 8-SOIC package, and -40°C ~ 125°C operating temperature range. Voltage dropout specification is 0.6V @ 100mA, compared to 0.45V for onsemi variants. All parts are ROHS3 compliant and Active product status.

Selection between packaging options (Tube, Cut Tape & Digi-Reel, Tape & Reel) is determined by assembly process requirements and inventory management practices.

Frequently Asked Questions (FAQ)

Q: Can LP2951ACD-3.3R2G directly replace LP2951CD-3.3R2G? A: Yes. LP2951ACD-3.3R2G is a parametric equivalent with identical electrical specifications and 8-SOIC package. The difference is packaging format: LP2951ACD-3.3R2G uses Cut Tape & Digi-Reel while LP2951CD-3.3R2G uses Tape & Reel. Both are onsemi products with Active status.

Q: What is the difference between onsemi and Texas Instruments LP2951 variants? A: Both manufacturers produce LP2951 regulators with identical core electrical performance (100mA, 3.3V output, 8-SOIC package). onsemi variants (LP2951CD-3.3R2G, LP2951ACD-3.3R2G) are specified as Fixed output type. Texas Instruments variants (LP2951ACM-3.3/NOPB, LP2951ACMX-3.3/NOPB, LP2951CM-3.3/NOPB, LP2951CMX-3.3/NOPB) are specified as Adjustable (Fixed) output type. Voltage dropout differs: onsemi 0.45V @ 100mA versus Texas Instruments 0.6V @ 100mA.

Q: Is NCV2951ACD3.3R2G suitable for automotive applications? A: Yes. NCV2951ACD3.3R2G carries automotive-grade qualification with AEC-Q100 certification. It is electrically equivalent to LP2951CD-3.3R2G and suitable for automotive-grade applications requiring this qualification.

Q: What packaging options are available? A: Three packaging formats are available across substitute parts: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Tube. All variants use the same 8-SOIC (0.154", 3.90mm Width) physical package. Packaging selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (LP2951ACD-3.3R2G, NCV2951ACD3.3R2G, and all Texas Instruments LP2951 variants) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Can Texas Instruments LP2951 parts be used in place of onsemi LP2951CD-3.3R2G? A: Yes, with consideration of voltage dropout specification. Texas Instruments variants maintain 100mA output current, 3.3V fixed output, and 8-SOIC package compatibility. Voltage dropout is 0.6V @ 100mA compared to 0.45V for onsemi. Applications with tight dropout requirements should account for this 0.15V difference.