LM2676SD-3.3 Equivalent & Substitute Parts

Part Overview

The LM2676SD-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 is housed in a 14-VDFN exposed pad surface mount package. The main part number is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

LM2676SD-3.3

Texas InstrumentsIn Stock: 3061LM2676SD-3.3 Datasheet

Current PartRFQ

LM2676SD-3.3/NOPB

Texas InstrumentsIn Stock: 2245LM2676SD-3.3/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2676SD-3.3 is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 3A
• Input voltage range of 8V to 40V
• Buck topology with positive output configuration
• Single output configuration
• 14-VDFN exposed pad package (5x6mm)
• Surface mount mounting type
• Switching frequency of 260kHz
• Operating temperature range of -40°C to 125°C

The LM2676SD-3.3/NOPB is classified as a manufacturer-recommended substitute, sharing identical electrical specifications and package configuration while differing only in product status and lead-free plating designation (NOPB = No Plumbum/Lead-Free).

Parameter Comparison

Engineering Selection Recommendations

The LM2676SD-3.3/NOPB is the direct equivalent for the LM2676SD-3.3. Both parts are ROHS3 compliant and carry identical electrical and thermal specifications. The primary distinction is product lifecycle status: the original LM2676SD-3.3 is in Last Time Buy phase, while the LM2676SD-3.3/NOPB maintains Active status with current manufacturing support from Texas Instruments. For new designs or ongoing procurement, the LM2676SD-3.3/NOPB is the recommended selection due to its active product status and assured long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the LM2676SD-3.3/NOPB be used as a direct replacement for the LM2676SD-3.3?

A: Yes. Both parts are electrically and mechanically identical, with matching output voltage, current rating, input voltage range, package configuration, and operating temperature specifications. The /NOPB designation indicates lead-free plating, which is compatible with standard PCB assembly processes.

Q: What does "Last Time Buy" status mean for the LM2676SD-3.3?

A: Last Time Buy indicates that Texas Instruments will no longer manufacture this specific part number after a defined cutoff date. Existing inventory may be available, but no new production runs are planned. Designs should transition to the active LM2676SD-3.3/NOPB variant.

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

A: No. Both parts use the 14-VDFN exposed pad package with identical 5x6mm dimensions and pinout configuration. PCB layouts and component footprints are fully interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the LM2676SD-3.3 and LM2676SD-3.3/NOPB are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity level).