LM2679T-ADJ Equivalent & Substitute Parts

Part Overview

The LM2679T-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. This device delivers 5A output current across an input voltage range of 8V to 40V, with adjustable output voltage from 1.21V to 37V. The part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement planning. The LM2679T-ADJ/NOPB represents the direct equivalent with active product status and improved compliance characteristics.

Substiute Parts

LM2679T-ADJ

Texas InstrumentsIn Stock: 2986LM2679T-ADJ Datasheet

Current PartRFQ

LM2679T-ADJ/NOPB

Texas InstrumentsIn Stock: 2406LM2679T-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2679T-ADJ is determined by strict equivalence across the following critical parameters:

• Buck topology with positive adjustable output configuration
• Single output stage
• Input voltage range: 8V to 40V
• Output voltage adjustability: 1.21V to 37V
• Output current capacity: 5A
• Switching frequency: 260kHz
• Synchronous rectifier: Not present
• Operating temperature range: -40°C to 125°C
• Through-hole mounting in TO-220-7 package

The LM2679T-ADJ/NOPB maintains identical electrical specifications and package configuration while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The LM2679T-ADJ/NOPB is the direct functional equivalent of the LM2679T-ADJ. Selection between these parts is determined by regulatory and procurement requirements:

The LM2679T-ADJ/NOPB is preferred for new designs and ongoing procurement due to its active product status and ROHS3 compliance. This part maintains full electrical and mechanical compatibility with the obsolete LM2679T-ADJ while offering improved supply chain availability and regulatory alignment.

The LM2679T-ADJ remains suitable for legacy system support where existing inventory is available and RoHS non-compliance does not present a constraint.

Frequently Asked Questions (FAQ)

Q: Can the LM2679T-ADJ/NOPB be used as a direct replacement for the LM2679T-ADJ?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The LM2679T-ADJ/NOPB differs only in product status (active vs. obsolete) and RoHS compliance classification.

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

A: The "/NOPB" suffix designates lead-free, RoHS3 compliant packaging supplied in tube format. This represents the current manufacturing standard for this device.

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

A: No. Both parts use the TO-220-7 Formed Leads package with identical pinout and mechanical dimensions.

Q: Which part should be specified for new designs?

A: The LM2679T-ADJ/NOPB should be specified for new designs. It offers active product status, ensuring long-term availability and support from Texas Instruments.

Q: Is the LM2679T-ADJ still available for purchase?

A: The LM2679T-ADJ is classified as obsolete. Existing inventory may be available through authorized distributors, but procurement should transition to the LM2679T-ADJ/NOPB for ongoing supply assurance.