LM2675N-12 Equivalent & Substitute Parts

Part Overview

The LM2675N-12 is a buck switching regulator IC from the SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 12V output at 1A maximum current. This device operates across a wide input voltage range of 6.5V to 40V and is housed in an 8-DIP (0.300", 7.62mm) through-hole package. The main part number is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

LM2675N-12

Texas InstrumentsIn Stock: 2954LM2675N-12 Datasheet

Current PartRFQ

LM2675N-12/NOPB

National SemiconductorIn Stock: 1478LM2675N-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2675N-12 is determined by strict equivalence across the following electrical and mechanical parameters:

• Fixed output voltage of 12V
• Output current rating of 1A
• Input voltage range of 6.5V to 40V minimum
• Switching frequency of 260kHz
• Buck topology with positive fixed output configuration
• 8-DIP (0.300", 7.62mm) through-hole package
• Operating temperature range of -40°C to 125°C

The substitute part LM2675N-12/NOPB meets all these criteria and maintains full electrical and mechanical compatibility with the original part number.

Parameter Comparison

Engineering Selection Recommendations

The LM2675N-12/NOPB is the direct equivalent substitute for the obsolete LM2675N-12. Both parts share identical electrical specifications and package geometry, ensuring pin-for-pin compatibility and drop-in replacement capability. The primary distinction is product status: the original part is obsolete while the substitute maintains active production status, providing assured long-term availability and supply chain continuity. The "/NOPB" suffix indicates lead-free (no-lead) plating, which aligns with modern RoHS compliance requirements. For new designs or ongoing production requiring 12V buck regulation at 1A output, the LM2675N-12/NOPB is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the LM2675N-12/NOPB be used as a direct replacement for the LM2675N-12?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including output voltage, current rating, input voltage range, switching frequency, operating temperature, and 8-DIP package dimensions. The substitution is direct with no circuit modifications required.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" designation indicates no-lead plating on the component leads, reflecting lead-free manufacturing standards. This is a packaging variant that does not affect electrical performance or compatibility.

Q: Why is the original LM2675N-12 listed as obsolete?

A: Product obsolescence is determined by the manufacturer based on production discontinuation. The LM2675N-12/NOPB remains in active production and serves as the current equivalent for this buck regulator specification.

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

A: No. Both parts operate across the same temperature range (-40°C to 125°C junction temperature) and share identical thermal characteristics due to equivalent die and package construction.

Q: Can this part be used in surface-mount applications?

A: No. Both the LM2675N-12 and LM2675N-12/NOPB are through-hole mounted components in 8-DIP package format. Surface-mount alternatives would require a different package type designation.