LM2676S-3.3 Equivalent & Substitute Parts

Part Overview

The LM2676S-3.3 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 3.3V 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 surface-mount TO-263-8 (D2PAK) package.

The LM2676S-3.3 carries a Last Time Buy product status, indicating that this specific part number variant is being discontinued. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term support.

Substiute Parts

LM2676S-3.3

Texas InstrumentsIn Stock: 1375LM2676S-3.3 Datasheet

Current PartRFQ

LM2676S-3.3/NOPB

Texas InstrumentsIn Stock: 2137LM2676S-3.3/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2676S-3.3 is determined by strict equivalence across the following critical parameters:

• Output Voltage: Fixed 3.3V output is mandatory; no tolerance variation is acceptable
• Output Current Rating: Minimum 3A capability required
• Input Voltage Range: Must support 8V to 40V operation
• Topology & Function: Buck (step-down) converter with positive output configuration
• Package Compatibility: TO-263-8 (D2PAK) form factor with identical pinout
• Switching Frequency: 260kHz operation for circuit timing compatibility
• Thermal & Environmental Specifications: Operating temperature range -40°C to 125°C; MSL 3 rating

The LM2676S-3.3/NOPB is classified as the manufacturer-recommended direct substitute. This part maintains identical electrical specifications and packaging while offering Active product status, ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

The LM2676S-3.3/NOPB is the direct equivalent for the LM2676S-3.3. Both parts share identical electrical and mechanical specifications, with the primary distinction being product lifecycle status. The LM2676S-3.3/NOPB carries Active status, indicating ongoing manufacturing and supply availability, whereas the LM2676S-3.3 is designated Last Time Buy.

For new designs and production continuity, the LM2676S-3.3/NOPB is the appropriate selection. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements. The identical MSL 3 rating ensures equivalent moisture handling during storage and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the LM2676S-3.3/NOPB be used as a direct replacement for the LM2676S-3.3?

A: Yes. Both parts are electrically and mechanically identical. The LM2676S-3.3/NOPB is the active production equivalent and is suitable for direct substitution in all applications.

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

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

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the TO-263-8 (D2PAK) package with identical pinout and lead configuration. PCB layouts and footprints are fully compatible.

Q: Why is the LM2676S-3.3 marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number variant. The LM2676S-3.3/NOPB remains in active production and is the recommended long-term alternative.

Q: Are there compliance or certification differences?

A: No. Both parts maintain identical RoHS3, REACH, and MSL certifications. Regulatory and environmental compliance requirements are equivalent.

Q: Can I mix these parts in the same production batch?

A: Yes. The electrical and mechanical equivalence permits interchangeable use within the same design and manufacturing process without circuit modification or re-qualification.