LM2671N-12 Equivalent & Substitute Parts

Part Overview

The LM2671N-12 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 12V output. This device delivers 500mA output current and operates across a 6.5V to 40V input range, making it suitable for industrial and embedded power supply applications.

The LM2671N-12 is classified as obsolete. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for legacy systems and new designs requiring this topology and performance specification.

Substiute Parts

LM2671N-12

Texas InstrumentsIn Stock: 1944LM2671N-12 Datasheet

Current PartRFQ

LM2671N-12/NOPB

Texas InstrumentsIn Stock: 1160LM2671N-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2671N-12 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (12V fixed)
• Output current capability (500mA minimum)
• Input voltage operating range (6.5V to 40V)
• Switching topology (buck converter)
• Package form factor (8-DIP, 0.300" pitch)
• Mounting technology (through-hole)
• Operating temperature range (-40°C to 125°C)

Parts meeting all these criteria are classified as direct substitutes. Variations in product status, packaging format (tube vs. bulk), RoHS compliance, or NOPB designation do not affect functional equivalence but may impact procurement, environmental compliance, and supply availability.

Parameter Comparison

Engineering Selection Recommendations

The LM2671N-12/NOPB is a direct functional equivalent to the LM2671N-12. Both devices share identical electrical specifications, package geometry, and thermal operating range. The primary distinction is product status: the LM2671N-12/NOPB is active and available, while the LM2671N-12 is obsolete.

For new designs and ongoing production, the LM2671N-12/NOPB is the appropriate selection. This part carries ROHS3 compliance, meeting current environmental regulations, whereas the original LM2671N-12 does not. The NOPB designation indicates lead-free construction, consistent with modern manufacturing standards.

Both parts are manufactured by Texas Instruments under the SIMPLE SWITCHER® series and maintain identical electrical performance characteristics. Selection between them should be based on supply availability, compliance requirements, and procurement timelines rather than technical performance.

Frequently Asked Questions (FAQ)

Q: Can the LM2671N-12/NOPB replace the LM2671N-12 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LM2671N-12/NOPB operates across the same input voltage range (6.5V to 40V), delivers the same output voltage (12V) and current (500mA), and uses the same 8-DIP package. No circuit modifications are required.

Q: What does the NOPB designation mean?

A: NOPB indicates "No Plumbum" (no lead). The LM2671N-12/NOPB uses lead-free solder and construction materials, complying with ROHS3 regulations. The original LM2671N-12 does not carry this designation.

Q: Why is the LM2671N-12 marked as obsolete?

A: Obsolescence reflects Texas Instruments' product lifecycle management. The LM2671N-12/NOPB remains active and is the current production equivalent, offering the same functionality with modern compliance standards.

Q: Are there differences in thermal performance between these parts?

A: No. Both devices operate across the identical temperature range (-40°C to 125°C junction temperature) and share the same thermal characteristics. Package geometry and die specifications are equivalent.

Q: Can I use these parts interchangeably in PCB designs?

A: Yes. Both parts use the 8-DIP (0.300", 7.62mm) package with identical pin assignments and through-hole mounting. PCB layouts and footprints require no modification.

Q: What is the switching frequency of these regulators?

A: Both the LM2671N-12 and LM2671N-12/NOPB operate at 260kHz switching frequency. This specification is fixed and identical across both parts.