LM2673SDX-12 Equivalent & Substitute Parts

Part Overview

The LM2673SDX-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 component operates across an input voltage range of 8V to 40V and features a switching frequency of 260kHz in a 14-VDFN surface mount package with exposed pad.

The LM2673SDX-12 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LM2673SDX-12

Texas InstrumentsIn Stock: 1127LM2673SDX-12 Datasheet

Current PartRFQ

LM2673SD-12/NOPB

Texas InstrumentsIn Stock: 1540LM2673SD-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2673SDX-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/maximum)
• Switching topology (buck converter)
• Package type and pinout (14-VDFN Exposed Pad)
• Switching frequency (260kHz)
• Operating temperature range (-40°C to 125°C)

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 to the LM2673SDX-12. Both devices share identical electrical performance specifications, package geometry, and thermal characteristics.

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

• Product Status: The LM2673SD-12/NOPB maintains Active status with ongoing manufacturer support, whereas the LM2673SDX-12 is Obsolete. For new designs or long-term production, the active part is preferred.

• RoHS Compliance: The LM2673SD-12/NOPB is ROHS3 compliant, while the LM2673SDX-12 is non-compliant. Applications subject to RoHS regulatory requirements must use the compliant variant.

• Packaging Format: The LM2673SDX-12 is supplied in bulk packaging, while the LM2673SD-12/NOPB is supplied in Tape & Reel format. Selection depends on procurement volume and assembly line requirements.

• Inventory Availability: Current stock levels differ between variants. Verify availability with your supplier for production scheduling.

Frequently Asked Questions (FAQ)

Q: Can the LM2673SD-12/NOPB be used as a direct replacement for the LM2673SDX-12?

A: Yes. Both devices are electrically and mechanically identical. They share the same output voltage (12V), output current rating (3A), input voltage range (8V to 40V), switching frequency (260kHz), and 14-VDFN package configuration. PCB layout and schematic modifications are not required.

Q: What is the difference between LM2673SDX-12 and LM2673SD-12/NOPB?

A: The primary differences are product status (Obsolete versus Active), RoHS compliance status (Non-Compliant versus ROHS3 Compliant), and packaging format (bulk versus Tape & Reel). Electrical and thermal performance are identical.

Q: Is the 14-VSON (5x6) package compatible with 14-VDFN footprints?

A: Yes. The 14-VSON (5x6) is the supplier device package designation for the 14-VDFN Exposed Pad case style. Both designations refer to the same physical package with identical pinout and dimensions.

Q: Does the LM2673SD-12/NOPB require different PCB layout considerations?

A: No. The package geometry, thermal pad dimensions, and pin assignments are identical to the LM2673SDX-12. Existing PCB designs require no modification.

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

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free). This designation is associated with RoHS3 compliance and Tape & Reel packaging format.

Q: Are there any temperature or frequency derating differences between these parts?

A: No. Both devices operate across the identical temperature range (-40°C to 125°C junction temperature) and maintain the same 260kHz switching frequency specification.