LM2676T-5.0 Equivalent & Substitute Parts

Part Overview

The LM2676T-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 TO-220-7 through-hole package.

The LM2676T-5.0 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM2676T-5.0

Texas InstrumentsIn Stock: 2400LM2676T-5.0 Datasheet

Current PartRFQ

LM2676T-5.0/NOPB

Texas InstrumentsIn Stock: 1677LM2676T-5.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2676T-5.0 are identified based on strict electrical and mechanical parameter matching:

Electrical Equivalence Criteria:

• Step-down (buck) topology with positive fixed output configuration
• Single output at 5V nominal voltage
• Output current capability of 3A
• Input voltage range of 8V to 40V minimum
• Switching frequency of 260kHz
• Operating temperature range of -40°C to 125°C (TJ)
• No synchronous rectifier requirement

Mechanical Equivalence Criteria:

• Through-hole mounting type
• TO-220-7 package with formed leads

Parts meeting all these parameters are classified as direct substitutes and may be used interchangeably in applications designed for the LM2676T-5.0.

Parameter Comparison

Engineering Selection Recommendations

The LM2676T-5.0/NOPB is the direct substitute for the obsolete LM2676T-5.0. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters: buck topology, 5V fixed output, 3A current rating, 8V to 40V input range, 260kHz switching frequency, and TO-220-7 through-hole package.

The primary distinction is product status and compliance certification. The LM2676T-5.0/NOPB carries active product status with ROHS3 compliance, whereas the original LM2676T-5.0 is obsolete and RoHS non-compliant. For new designs or production continuity, the LM2676T-5.0/NOPB is the appropriate selection. The "/NOPB" suffix indicates lead-free plating, consistent with modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the LM2676T-5.0/NOPB be used as a direct replacement for the LM2676T-5.0?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The LM2676T-5.0/NOPB is the active production equivalent with current compliance certifications.

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

A: The "/NOPB" suffix denotes "No Plumbum" (lead-free) termination plating, meeting RoHS3 compliance requirements. This is a manufacturing designation and does not affect electrical performance or pin compatibility.

Q: Are there differences in packaging between these parts?

A: The LM2676T-5.0/NOPB is supplied in tube packaging, while the original LM2676T-5.0 packaging is not specified. Both use the same TO-220-7 through-hole package format. Tube packaging is standard for active production components.

Q: What is the significance of the product status difference?

A: The LM2676T-5.0 is obsolete, indicating Texas Instruments has discontinued manufacturing. The LM2676T-5.0/NOPB is active, ensuring ongoing availability, technical support, and compliance with current regulatory standards.

Q: Are there any thermal or performance differences between these substitutes?

A: No. Both parts operate across the identical temperature range (-40°C to 125°C junction temperature) and deliver the same electrical performance specifications.