LM2670S-12 Equivalent & Substitute Parts

Part Overview

The LM2670S-12 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 12V output at 3A maximum current. This device operates across an input voltage range of 8V to 40V and is housed in a TO-263-8 (D2PAK) surface mount package.

The LM2670S-12 is classified as obsolete. Locating equivalent or substitute components becomes necessary when original stock is depleted or when design requirements mandate active product status for long-term availability and supply chain stability.

Substiute Parts

LM2670S-12

Texas InstrumentsIn Stock: 1407LM2670S-12 Datasheet

Current PartRFQ

LM2670S-12/NOPB

Texas InstrumentsIn Stock: 2052LM2670S-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2670S-12 is determined by strict equivalence across the following electrical and mechanical parameters:

• Output voltage configuration: Fixed 12V output
• Output current capability: 3A minimum
• Input voltage operating range: 8V to 40V minimum
• Switching topology: Buck converter
• Package compatibility: TO-263-8 (D2PAK) surface mount
• Thermal operating range: -40°C to 125°C (TJ)
• Pin configuration: 7 leads plus tab

The LM2670S-12/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction lies in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2670S-12/NOPB is the direct functional equivalent of the LM2670S-12. Both devices share identical electrical performance, output specifications, and physical packaging.

Selection between these parts should be based on the following criteria:

LM2670S-12: Use only when existing inventory is available and product status is not a constraint. This part is obsolete and subject to availability limitations.

LM2670S-12/NOPB: Recommended for new designs and applications requiring long-term component availability. This part carries active product status, ROHS3 compliance, and REACH affected designation, making it suitable for applications with regulatory requirements or extended production lifecycles.

The /NOPB suffix indicates lead-free plating and compliance with modern environmental standards. Packaging is supplied in tube format for the substitute part, compared to the original part specification.

Frequently Asked Questions (FAQ)

Q: Are the LM2670S-12 and LM2670S-12/NOPB electrically interchangeable?

A: Yes. Both devices deliver identical electrical performance with 12V fixed output at 3A, 260kHz switching frequency, and 8V to 40V input range. Pin configuration and package footprint are identical.

Q: What does the /NOPB suffix indicate?

A: The /NOPB designation specifies lead-free plating and RoHS3 compliance. This affects solder joint reliability and environmental compliance but does not alter electrical functionality.

Q: Can I use LM2670S-12/NOPB in place of LM2670S-12 on existing PCBs?

A: Yes. The TO-263-8 (D2PAK) package footprint is identical. No PCB redesign is required. Verify that your assembly process is qualified for lead-free solder if transitioning from the original part.

Q: Why is the original LM2670S-12 marked as obsolete?

A: Product obsolescence typically results from manufacturer discontinuation decisions. The LM2670S-12/NOPB remains in active production and serves as the current equivalent.

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

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

Q: What is the difference in packaging between these parts?

A: The LM2670S-12 packaging is unspecified in the provided data. The LM2670S-12/NOPB is supplied in tube packaging. Verify packaging requirements for your assembly process.