LM2673SD-5.0 Equivalent & Substitute Parts

Part Overview

The LM2673SD-5.0 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 5V 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 with exposed pad.

The LM2673SD-5.0 carries an obsolete product status. Identifying equivalent 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-5.0

Texas InstrumentsIn Stock: 935LM2673SD-5.0 Datasheet

Current PartRFQ

LM2673SD-5.0/NOPB

Texas InstrumentsIn Stock: 1145LM2673SD-5.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2673SD-5.0 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Function: Step-Down (Buck) topology
• Output Configuration: Positive
• Output Type: Fixed at 5V
• Number of Outputs: 1
• Input Voltage Range: 8V minimum to 40V maximum
• Output Current: 3A
• Switching Frequency: 260kHz
• Operating Temperature Range: -40°C ~ 125°C (TJ)
• Package / Case: 14-VDFN Exposed Pad
• Supplier Device Package: 14-VSON (5x6)
• Mounting Type: Surface Mount

Parts meeting all these parameters are classified as direct substitutes. Variations in product status, packaging format (tape & reel vs. bulk), RoHS compliance, or REACH status do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LM2673SD-5.0/NOPB is a direct electrical and mechanical substitute for the LM2673SD-5.0. Both parts share identical functional specifications, electrical performance parameters, and physical package dimensions.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The LM2673SD-5.0 is classified as obsolete, while the LM2673SD-5.0/NOPB maintains active product status. Additionally, the LM2673SD-5.0/NOPB meets ROHS3 compliance requirements, whereas the original part is RoHS non-compliant.

For new designs or ongoing production requiring regulatory compliance with modern environmental standards, the LM2673SD-5.0/NOPB is the appropriate selection. For legacy system maintenance where RoHS compliance is not a requirement, either part provides equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Are the LM2673SD-5.0 and LM2673SD-5.0/NOPB electrically identical?

A: Yes. Both parts deliver identical electrical performance across all specified parameters: 5V fixed output, 3A maximum current, 8V to 40V input range, and 260kHz switching frequency.

Q: What is the difference between these two part numbers?

A: The LM2673SD-5.0/NOPB includes the "/NOPB" suffix, indicating lead-free, RoHS3 compliant manufacturing. The original LM2673SD-5.0 is RoHS non-compliant. Both use identical 14-VSON (5x6) packaging.

Q: Can I use LM2673SD-5.0/NOPB as a direct replacement in existing designs?

A: Yes. The LM2673SD-5.0/NOPB is a direct pin-for-pin and functionally equivalent substitute. No circuit modifications are required.

Q: Why is the original LM2673SD-5.0 marked as obsolete?

A: Product obsolescence reflects Texas Instruments' lifecycle management. The LM2673SD-5.0/NOPB remains in active production and is the recommended part for current applications.

Q: Are there packaging format differences between these parts?

A: The LM2673SD-5.0 is available in bulk form, while the LM2673SD-5.0/NOPB is supplied in Tape & Reel (TR) format. Both use the same 14-VSON (5x6) physical package.