LP2951ACDR2 Equivalent & Substitute Parts

Part Overview

The LP2951ACDR2 is a linear voltage regulator IC from onsemi, designed for low-dropout (LDO) regulation applications requiring 100mA output current. This device supports both fixed 5V and adjustable output configurations in an 8-SOIC surface mount package. The main part number is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement.

Substiute Parts

LP2951ACDR2

onsemiIn Stock: 2986LP2951ACDR2 Datasheet

Current PartRFQ

LP2951ACDR2G

onsemiIn Stock: 45411LP2951ACDR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2951ACDR2 is determined by the following critical parameters:

• Manufacturer & Base Product Series: Both parts must be from onsemi's LP2951 family to ensure functional equivalence
• Package Type: Identical 8-SOIC package ensures mechanical and electrical compatibility
• Output Current Rating: 100mA output current capacity must be maintained
• Operating Temperature Range: -40°C to 125°C operational window must be supported
• Regulatory Compliance: RoHS and REACH status must be evaluated for end-application requirements

The LP2951ACDR2G qualifies as a direct substitute based on these parameters. Both devices share the same base product number, package specification, current rating, and temperature range.

Parameter Comparison

Engineering Selection Recommendations

The LP2951ACDR2G is the appropriate substitute for the obsolete LP2951ACDR2. Selection rationale:

• Product Status: The LP2951ACDR2G maintains active production status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: The substitute achieves ROHS3 compliance, addressing modern environmental and regulatory requirements that the original non-compliant part does not meet
• Functional Equivalence: Identical package, output current, and temperature specifications ensure direct replacement capability without circuit redesign
• Inventory Availability: The LP2951ACDR2G has significantly higher stock levels (45,400 pcs vs. 2,896 pcs), supporting production and procurement timelines

Frequently Asked Questions (FAQ)

Q: Can LP2951ACDR2G be used as a direct pin-for-pin replacement? A: Yes. Both devices use the 8-SOIC package with identical pinout and electrical specifications for output current and temperature range, enabling direct substitution without PCB modifications.

Q: What is the difference between LP2951ACDR2 and LP2951ACDR2G? A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and availability. The "G" suffix typically indicates a RoHS-compliant variant. Electrical performance remains equivalent for the specified parameters.

Q: Are there packaging options for the LP2951ACDR2G? A: The LP2951ACDR2G is available in Cut Tape (CT) and Digi-Reel® packaging formats, both maintaining the 8-SOIC package specification.

Q: What are the key electrical parameters I should verify? A: Confirm output current requirement (100mA), operating temperature range (-40°C to 125°C), and voltage dropout specifications (0.45V @ 100mA for the substitute). These parameters determine functional compatibility in your application.

Q: Is the LP2951ACDR2G suitable for new designs? A: Yes. The active product status, ROHS3 compliance, and established availability make the LP2951ACDR2G appropriate for both legacy replacement and new design implementations.