LM2676T-ADJ Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2676T-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for positive adjustable step-down voltage regulation. This device delivers 3A output current with an adjustable output voltage range from 1.2V to 37V, making it suitable for diverse power management applications requiring input voltages between 8V and 40V.

The main part number LM2676T-ADJ carries a Last Time Buy product status, indicating discontinued production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or design revisions.

Substiute Parts

LM2676T-ADJ

Texas InstrumentsIn Stock: 4090LM2676T-ADJ Datasheet

Current PartRFQ

LM2676T-ADJ/NOPB

Texas InstrumentsIn Stock: 9870LM2676T-ADJ/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2676T-ADJ is determined by strict equivalence across the following critical parameters:

• Buck topology with positive adjustable output configuration
• Single output channel
• Input voltage range: 8V to 40V
• Output voltage adjustability: 1.2V to 37V
• Output current capacity: 3A
• Switching frequency: 260kHz
• Non-synchronous rectifier design
• Operating temperature range: -40°C to 125°C
• TO-220-7 through-hole package with formed leads
• ROHS3 compliance and MSL Level 1 rating

The LM2676T-ADJ/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The LM2676T-ADJ/NOPB is the direct substitute for the LM2676T-ADJ. Both devices are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The LM2676T-ADJ/NOPB carries Active product status, ensuring continued availability and support, whereas the original part number is designated Last Time Buy.

Selection between these part numbers should prioritize the LM2676T-ADJ/NOPB for new designs and production runs. The /NOPB suffix indicates lead-free plating, consistent with ROHS3 compliance requirements. Both parts maintain equivalent thermal performance, regulatory compliance, and functional characteristics across the specified operating temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

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

A: Yes. Both part numbers are electrically and mechanically identical. The LM2676T-ADJ/NOPB is the recommended substitute due to its Active product status and continued manufacturing support.

Q: What does the /NOPB suffix indicate?

A: The /NOPB suffix denotes lead-free plating on the component leads, confirming ROHS3 compliance and environmental regulation adherence.

Q: Are there any package or mounting differences between these part numbers?

A: Both parts use the TO-220-7 through-hole package with formed leads. The primary packaging difference is format: LM2676T-ADJ is supplied in bulk, while LM2676T-ADJ/NOPB is supplied in tube packaging.

Q: What is the significance of the Last Time Buy status on LM2676T-ADJ?

A: Last Time Buy indicates that Texas Instruments has discontinued production of this specific part number. Existing inventory may be available, but no new manufacturing runs are planned. The LM2676T-ADJ/NOPB remains in active production.

Q: Are the thermal and electrical performance characteristics identical?

A: Yes. Both devices deliver 3A output current, operate across 8V to 40V input range, support 1.2V to 37V adjustable output, and maintain identical switching frequency and operating temperature specifications.

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

A: Yes. The TO-220-7 package pinout and lead configuration are identical, allowing direct PCB layout compatibility without design modifications.