LM2673SD-12 Equivalent & Substitute Parts

Part Overview

The LM2673SD-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 features a 260kHz switching frequency in a 14-VDFN surface mount package.

The LM2673SD-12 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LM2673SD-12

Texas InstrumentsIn Stock: 812LM2673SD-12 Datasheet

Current PartRFQ

LM2673SD-12/NOPB

Texas InstrumentsIn Stock: 1540LM2673SD-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2673SD-12 is determined by strict equivalence across the following critical parameters:

• Output voltage configuration (fixed 12V)
• Maximum output current rating (3A)
• Input voltage operating range (8V to 40V minimum)
• Switching topology (buck converter)
• Package form factor (14-VDFN Exposed Pad)
• Thermal operating range (-40°C to 125°C)
• Switching frequency (260kHz)

The LM2673SD-12/NOPB qualifies as a direct substitute based on identical electrical specifications and package compatibility. The primary distinction is packaging format (Tape & Reel versus bulk) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The LM2673SD-12/NOPB is the direct functional equivalent of the LM2673SD-12. Both devices share identical electrical specifications, thermal characteristics, and package geometry, ensuring pin-for-pin and functional compatibility.

Selection between these parts should be based on:

• Product Status: The LM2673SD-12/NOPB carries Active status, ensuring continued manufacturer support and availability. The LM2673SD-12 is Obsolete.
• Compliance Requirements: The LM2673SD-12/NOPB meets RoHS3 compliance, while the LM2673SD-12 is RoHS non-compliant. Applications subject to RoHS regulations must use the compliant variant.
• Packaging Requirements: The LM2673SD-12/NOPB is supplied in Tape & Reel format, suitable for automated assembly. The LM2673SD-12 is supplied in bulk packaging.

Both parts maintain REACH Unaffected status and identical ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the LM2673SD-12/NOPB be used as a direct replacement for the LM2673SD-12?

A: Yes. Both devices are electrically and mechanically identical. The LM2673SD-12/NOPB provides the same 12V fixed output, 3A current capability, and 14-VDFN package. Substitution requires no circuit modifications.

Q: What is the difference between LM2673SD-12 and LM2673SD-12/NOPB?

A: The primary differences are product status (Obsolete versus Active), RoHS compliance (non-compliant versus RoHS3 compliant), and packaging format (bulk versus Tape & Reel). Electrical and thermal specifications are identical.

Q: Is the 14-VDFN package compatible with 14-VSON footprints?

A: Yes. The 14-VDFN Exposed Pad package is supplied as 14-VSON (5x6) by the supplier. The footprint and pinout are compatible for PCB assembly.

Q: Does the LM2673SD-12/NOPB meet RoHS requirements?

A: Yes. The LM2673SD-12/NOPB is RoHS3 compliant. The original LM2673SD-12 is RoHS non-compliant and may not be suitable for applications with RoHS regulatory requirements.

Q: Are there inventory considerations when selecting between these parts?

A: The LM2673SD-12 has 705 pieces in stock (Obsolete status). The LM2673SD-12/NOPB has 1461 pieces in stock (Active status). For long-term supply chain stability, the active part is recommended.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. No design changes are required. Both parts operate identically within the specified input voltage range (8V to 40V), output voltage (12V), and current rating (3A). PCB layout and external component values remain unchanged.