LM2671MX-12 Equivalent & Substitute Parts

Part Overview

The LM2671MX-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 management applications.

The LM2671MX-12 is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for existing applications and new designs requiring this functional specification.

Substiute Parts

LM2671MX-12

Texas InstrumentsIn Stock: 799LM2671MX-12 Datasheet

Current PartRFQ

LM2671MX-12/NOPB

Texas InstrumentsIn Stock: 3899LM2671MX-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2671MX-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-SOIC)
• Thermal operating range (-40°C to 125°C)
• Synchronous rectifier configuration (non-synchronous)

The LM2671MX-12/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The LM2671MX-12/NOPB is the direct functional equivalent for the obsolete LM2671MX-12. Both devices share identical electrical performance specifications, thermal ratings, and package geometry, ensuring pin-for-pin and functional compatibility.

The LM2671MX-12/NOPB carries Active product status and ROHS3 compliance, providing advantages for new designs and applications subject to regulatory requirements. The Tape & Reel packaging format is standard for automated assembly processes and high-volume production environments.

Selection between these parts should be based on application requirements: the LM2671MX-12/NOPB is the preferred choice for new designs, production builds, and applications requiring RoHS compliance. Existing inventory of the LM2671MX-12 remains functionally interchangeable for legacy systems where RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can the LM2671MX-12/NOPB replace the LM2671MX-12 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LM2671MX-12/NOPB is a direct substitute with no circuit modifications required. The primary differences are product status (Active versus Obsolete) and packaging format (Tape & Reel versus bulk).

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates the part is supplied in Tape & Reel packaging format without plumbum (lead-free, RoHS compliant). This is the standard packaging format for automated manufacturing and high-volume production.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both the LM2671MX-12 and LM2671MX-12/NOPB operate identically across all electrical parameters, including output voltage, current rating, input voltage range, switching frequency, and thermal operating range.

Q: Why is the LM2671MX-12 marked as obsolete?

A: Obsolete status indicates the part is no longer in active production. The LM2671MX-12/NOPB remains in active production and is the recommended choice for all new applications.

Q: Is the 8-SOIC package compatible with standard PCB assembly equipment?

A: Yes. The 8-SOIC (0.154", 3.90mm Width) package is a standard surface-mount form factor compatible with conventional pick-and-place and reflow soldering processes used in automated PCB assembly.

Q: What compliance certifications apply to the LM2671MX-12/NOPB?

A: The LM2671MX-12/NOPB is ROHS3 compliant and REACH unaffected. The original LM2671MX-12 is RoHS non-compliant. Applications subject to environmental or regulatory restrictions should specify the LM2671MX-12/NOPB.