LM2676S-ADJ Equivalent & Substitute Parts

Part Overview

The LM2676S-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for positive adjustable output applications. This device operates as a step-down converter with a fixed switching frequency of 260kHz and delivers up to 3A output current. The main part number LM2676S-ADJ is currently in Last Time Buy status, making identification of active equivalent parts essential for ongoing design support and procurement planning.

Substiute Parts

LM2676S-ADJ

Texas InstrumentsIn Stock: 1771LM2676S-ADJ Datasheet

Current PartRFQ

LM2676S-ADJ/NOPB

Texas InstrumentsIn Stock: 1741LM2676S-ADJ/NOPB Datasheet

MFR RecommendedRFQ

LM2670S-ADJ/NOPB

Texas InstrumentsIn Stock: 17137LM2670S-ADJ/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Topology and Function: Buck (step-down) converter with positive adjustable output
• Electrical Specifications: Input voltage range 8V–40V, output range 1.2V–37V, 3A output current, 260kHz switching frequency
• Package Compatibility: TO-263-8 (D2PAK with 7 leads plus tab)
• Thermal and Environmental: Operating temperature -40°C to 125°C, MSL 3 rating
• Regulatory Compliance: ROHS3 compliant, REACH unaffected

The identified substitutes maintain identical electrical and mechanical specifications, differing only in product status and packaging configuration (tube vs. standard packaging).

Parameter Comparison

Engineering Selection Recommendations

For applications currently using LM2676S-ADJ, the following selection criteria apply:

LM2676S-ADJ/NOPB is the direct equivalent with identical electrical and mechanical specifications. This part carries Active product status and is available in tube packaging, making it suitable for immediate procurement and long-term design continuity.

LM2670S-ADJ/NOPB provides full electrical and mechanical compatibility with significantly higher inventory availability (17,050 units vs. 1,719 units). Both parts maintain identical performance parameters, package configuration, and regulatory compliance. Selection between these two active alternatives depends on procurement lead time and inventory requirements rather than technical performance.

The main part number LM2676S-ADJ, currently in Last Time Buy status, should be transitioned to one of the active substitutes for new designs or ongoing production requirements.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are electrically and mechanically identical, with the /NOPB suffix indicating lead-free (no-lead) plating. The primary difference is product status: LM2676S-ADJ is Last Time Buy, while LM2676S-ADJ/NOPB is Active.

Q: What is the difference between LM2676S-ADJ/NOPB and LM2670S-ADJ/NOPB?

A: Both parts are functionally equivalent with identical electrical specifications (8V–40V input, 1.2V–37V adjustable output, 3A current, 260kHz switching). The base product numbers differ (LM2676 vs. LM2670), but all critical parameters for substitution are matched. Selection should be based on inventory availability and procurement timing.

Q: Are the package dimensions identical across all three part numbers?

A: Yes. All three parts use the TO-263-8 package (D2PAK with 7 leads plus tab), ensuring PCB layout and thermal management compatibility without modification.

Q: What does the /NOPB suffix indicate?

A: The /NOPB suffix denotes lead-free plating (no-lead plating), indicating RoHS3 compliance and halogen-free construction. This is standard for current production parts.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design was originally qualified for the TO-263-8 package and the specified electrical parameters (8V–40V input, adjustable 1.2V–37V output, 3A maximum current). No circuit modifications are required.