LM3674MF-2.8 Equivalent & Substitute Parts

Part Overview

The LM3674MF-2.8 is a buck switching regulator IC from Texas Instruments designed for positive fixed 2.8V output applications. This device delivers 600mA output current with a 2MHz switching frequency and integrated synchronous rectification. The main part number (LM3674MF-2.8) is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

LM3674MF-2.8

Texas InstrumentsIn Stock: 1952LM3674MF-2.8 Datasheet

Current PartRFQ

LM3674MF-2.8/NOPB

Texas InstrumentsIn Stock: 1948LM3674MF-2.8/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM3674MF-2.8 is determined by strict equivalence across the following parameters:

• Output voltage: Fixed 2.8V
• Output current capability: 600mA minimum
• Input voltage range: 2.7V to 5.5V
• Switching topology: Buck (step-down)
• Package: SC-74A, SOT-753 (SOT-23-5)
• Synchronous rectification: Present
• Switching frequency: 2MHz
• Operating temperature range: -30°C to 85°C

The substitute part LM3674MF-2.8/NOPB shares identical electrical specifications and package configuration with the main part number. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The LM3674MF-2.8/NOPB is the direct active equivalent for the obsolete LM3674MF-2.8. Selection between these parts is determined by application requirements and regulatory compliance:

• For new designs and production requiring RoHS3 compliance, the LM3674MF-2.8/NOPB is the appropriate choice.
• For legacy system support where RoHS compliance is not mandated, either part number provides identical electrical performance.
• The LM3674MF-2.8/NOPB is supplied in Tape & Reel format, suitable for automated assembly processes.
• Both parts maintain identical electrical specifications, thermal performance, and package footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM3674MF-2.8/NOPB replace LM3674MF-2.8 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LM3674MF-2.8/NOPB is the active production equivalent with improved compliance status.

Q: What is the difference between these part numbers?

A: The primary differences are product status (obsolete vs. active), RoHS compliance certification (non-compliant vs. ROHS3 compliant), and packaging format (bulk vs. Tape & Reel). Electrical specifications and package dimensions are identical.

Q: Are there any PCB layout or thermal considerations when substituting?

A: No. Both parts use the same SC-74A, SOT-753 package with identical pin configuration and thermal characteristics. PCB layouts are directly compatible without modification.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB designation indicates lead-free (no-lead) manufacturing and ROHS3 compliance, meeting current environmental and regulatory standards.

Q: Is the Tape & Reel packaging compatible with my assembly process?

A: Tape & Reel format is standard for automated pick-and-place assembly. If manual assembly or bulk handling is required, confirm packaging compatibility with your manufacturing process.