LP2951ACN/NOPB Equivalent & Substitute Parts

Part Overview

The LP2951ACN/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable (fixed) output applications. This Through Hole 8-DIP package component delivers 100mA output current with a maximum input voltage of 30V and adjustable output range from 1.235V to 29V. The device is Active in product status and widely used in power management circuits requiring regulated DC voltage supply with integrated protection features including over-current, over-temperature, and short-circuit protection.

Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits component optimization while maintaining electrical and mechanical compatibility.

Substiute Parts

LP2951ACN/NOPB

Texas InstrumentsIn Stock: 949LP2951ACN/NOPB Datasheet

Current PartRFQ

LP2951CN/NOPB

Texas InstrumentsIn Stock: 5458LP2951CN/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2951ACN/NOPB is determined by strict equivalence across the following critical parameters:

• Output Configuration & Type: Positive adjustable (fixed) output with single regulator
• Voltage Specifications: Input maximum 30V, output range 1.235V to 29V, dropout 0.6V @ 100mA
• Current Ratings: 100mA output, 120 µA quiescent, 14 mA maximum supply current
• Protection & Control: Over-current, over-temperature, and short-circuit protection with Enable control feature
• Thermal Range: Operating temperature -40°C to 125°C (TJ)
• Package Compatibility: 8-DIP (0.300", 7.62mm) Through Hole mounting
• Compliance: ROHS3 Compliant, REACH Unaffected, MSL 1

The LP2951CN/NOPB qualifies as a parametric equivalent because it maintains identical electrical specifications and mechanical compatibility across all critical parameters while differing only in temperature grade designation (commercial vs. industrial).

Parameter Comparison

Engineering Selection Recommendations

Both the LP2951ACN/NOPB and LP2951CN/NOPB maintain Active product status from Texas Instruments, ensuring continued manufacturer support and availability. Both components are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for industrial and commercial applications.

The LP2951CN/NOPB is electrically and mechanically identical to the LP2951ACN/NOPB across all specified parameters. Selection between these parts should be based on inventory availability, lead time requirements, and application-specific thermal operating conditions within the -40°C to 125°C range.

Frequently Asked Questions (FAQ)

Q: What is the difference between LP2951ACN/NOPB and LP2951CN/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications and mechanical compatibility. The designation difference reflects temperature grade classification, but both operate across the same -40°C to 125°C temperature range.

Q: Can LP2951CN/NOPB be used as a direct replacement for LP2951ACN/NOPB?

A: Yes. The LP2951CN/NOPB is a direct substitute. Both components share identical output configuration, voltage ratings, current specifications, protection features, and 8-DIP package footprint.

Q: Are there any PCB layout or circuit design changes required when substituting these parts?

A: No. Both parts use the same 8-DIP (0.300", 7.62mm) Through Hole package and maintain identical pin configuration, electrical characteristics, and control features. No circuit modifications are necessary.

Q: What compliance certifications apply to both parts?

A: Both LP2951ACN/NOPB and LP2951CN/NOPB are ROHS3 Compliant, REACH Unaffected, with Moisture Sensitivity Level 1 (Unlimited). Both maintain Active product status.

Q: How do I determine which substitute part to select?

A: Selection should be based on current inventory levels, supplier lead times, and application thermal requirements. Since both parts are electrically and mechanically equivalent, either part satisfies the same design requirements.