LP2951ACN-3.3 Equivalent & Substitute Parts

Part Overview

The LP2951ACN-3.3 is a linear voltage regulator IC from onsemi, classified as a Power Management (PMIC) component. It delivers a fixed positive 3.3V output at 100mA with a maximum dropout voltage of 0.45V. The device is mounted in an 8-DIP package and includes over-current and over-temperature protection features. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and procurement.

Substiute Parts

LP2951ACN-3.3

onsemiIn Stock: 1219LP2951ACN-3.3 Datasheet

Current PartRFQ

LP2951ACN-3.3G

onsemiIn Stock: 1231LP2951ACN-3.3G Datasheet

DirectRFQ

LP2951CN-3.3G

onsemiIn Stock: 1443LP2951CN-3.3G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2951ACN-3.3 is determined by strict equivalence across the following electrical and mechanical parameters:

• Output voltage: 3.3V fixed
• Output current capability: 100mA
• Input voltage rating: 30V maximum
• Dropout voltage: 0.45V @ 100mA
• Quiescent current: 120 µA
• Operating temperature range: -40°C ~ 125°C
• Package type: 8-DIP (0.300", 7.62mm)
• Mounting configuration: Through Hole
• Protection features: Over Current, Over Temperature

The identified substitutes maintain identical electrical specifications and package footprint compatibility. Differences exist only in packaging format (Tube vs. standard) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both LP2951ACN-3.3G and LP2951CN-3.3G are direct parametric equivalents to the LP2951ACN-3.3. Selection between these substitutes should be based on the following criteria:

RoHS Compliance: LP2951ACN-3.3G and LP2951CN-3.3G are ROHS3 compliant, whereas the original LP2951ACN-3.3 is RoHS non-compliant. For applications requiring RoHS compliance, either substitute is suitable.

Packaging Format: LP2951ACN-3.3G and LP2951CN-3.3G are supplied in Tube packaging, which may differ from the original part's standard packaging. Verify that tube packaging is compatible with your assembly and handling processes.

Availability: All three parts are listed as obsolete. Current inventory levels should be verified with your supplier before final selection.

Frequently Asked Questions (FAQ)

Q: Can LP2951ACN-3.3G and LP2951CN-3.3G be used interchangeably with LP2951ACN-3.3?

A: Yes. Both substitutes maintain identical electrical specifications, output voltage, current rating, dropout voltage, quiescent current, operating temperature range, and package footprint. They are pin-compatible and functionally equivalent for through-hole PCB assembly.

Q: What is the difference between LP2951ACN-3.3G and LP2951CN-3.3G?

A: Both parts are parametrically identical. The primary difference is the packaging format (Tube) and RoHS3 compliance status. Electrical performance and pin configuration are equivalent.

Q: Does the Tube packaging affect PCB assembly compatibility?

A: Tube packaging is a distribution format and does not affect PCB assembly compatibility. The component itself maintains the same 8-DIP (0.300", 7.62mm) footprint and through-hole mounting configuration. Verify that your assembly process can accommodate tube-packaged components.

Q: Are these parts suitable for new designs?

A: All three parts are classified as obsolete. For new designs, consult onsemi's current product portfolio for active linear voltage regulator alternatives with equivalent specifications.

Q: What compliance certifications apply to these substitutes?

A: LP2951ACN-3.3G and LP2951CN-3.3G are ROHS3 compliant and REACH unaffected. Both carry ECCN EAR99 classification and HTSUS code 8542.39.0001.