LP2951ACN-3.3G Equivalent & Substitute Parts

Part Overview

The LP2951ACN-3.3G is a linear voltage regulator IC from onsemi, designed to deliver a fixed 3.3V output at 100mA. This through-hole 8-DIP package component provides positive fixed output regulation with integrated over-current and over-temperature protection. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing design support and production continuity.

Substiute Parts

LP2951ACN-3.3G

onsemiIn Stock: 1231LP2951ACN-3.3G Datasheet

Current PartRFQ

LP2951CN-3.3G

onsemiIn Stock: 1443LP2951CN-3.3G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2951ACN-3.3G is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 100mA
• Maximum input voltage rating of 30V
• Dropout voltage specification of 0.45V @ 100mA
• Quiescent current of 120 µA
• 8-DIP through-hole package configuration (0.300", 7.62mm)
• Operating temperature range of -40°C ~ 125°C
• Integrated over-current and over-temperature protection
• ROHS3 compliance and equivalent regulatory status

The LP2951CN-3.3G meets all these criteria and is classified as a parametric equivalent. Both parts share the same base product number (LP2951) and differ only in packaging designation (ACN vs. CN), which does not affect electrical performance or pin compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LP2951CN-3.3G is a direct parametric equivalent to the LP2951ACN-3.3G. Both parts are obsolete products from onsemi with identical electrical specifications, pin configurations, and package dimensions. Selection between these two parts is based on availability and inventory status rather than technical differentiation.

Current inventory shows 1336 units of LP2951CN-3.3G available compared to 1172 units of LP2951ACN-3.3G. Both parts maintain ROHS3 compliance and equivalent regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001), ensuring compliance with applicable standards.

For applications requiring the LP2951ACN-3.3G, the LP2951CN-3.3G provides complete functional and mechanical interchangeability without design modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Are LP2951ACN-3.3G and LP2951CN-3.3G pin-compatible?

A: Yes. Both parts use the 8-DIP package with identical pin assignments and electrical characteristics. Direct substitution on PCBs designed for either part number is supported.

Q: What does the difference between "ACN" and "CN" designations mean?

A: The designations refer to packaging variants within the same product line. Both variants deliver identical electrical performance and are housed in the same 8-DIP through-hole package. The difference does not affect circuit functionality or compatibility.

Q: Can I use LP2951CN-3.3G in a design originally specified for LP2951ACN-3.3G?

A: Yes. The parts are parametric equivalents with matching output voltage, current rating, dropout voltage, temperature range, and protection features. No circuit modifications are required.

Q: Are both parts still in production?

A: No. Both the LP2951ACN-3.3G and LP2951CN-3.3G are classified as obsolete products. Inventory availability is limited to existing stock from distributors.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry the same ECCN and HTSUS classifications, ensuring equivalent regulatory compliance.