LM2676T-3.3 Equivalent & Substitute Parts

Part Overview

The LM2676T-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 and 3A current capacity. This component operates across an input voltage range of 8V to 40V and is housed in a TO-220-7 package with formed leads for through-hole mounting.

The LM2676T-3.3 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LM2676T-3.3

Texas InstrumentsIn Stock: 3907LM2676T-3.3 Datasheet

Current PartRFQ

LM2676T-3.3/NOPB

Texas InstrumentsIn Stock: 878LM2676T-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2676T-3.3 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (3.3V fixed)
• Output current rating (3A minimum)
• Input voltage operating range (8V to 40V)
• Switching frequency (260kHz)
• Package and pinout compatibility (TO-220-7 Formed Leads)
• Thermal operating range (-40°C to 125°C)

The LM2676T-3.3/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction between these parts is product status and compliance certification, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM2676T-3.3/NOPB is the direct substitute for the obsolete LM2676T-3.3. Both parts share identical electrical specifications, output characteristics, and physical packaging. The LM2676T-3.3/NOPB is currently in active production status with confirmed inventory availability.

For new designs or production requiring RoHS3 compliance, the LM2676T-3.3/NOPB is the appropriate selection. The NOPB designation indicates lead-free construction, aligning with modern environmental and regulatory standards. The tube packaging format of the LM2676T-3.3/NOPB supports standard automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the LM2676T-3.3/NOPB directly replace the LM2676T-3.3 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LM2676T-3.3/NOPB maintains the same pinout, voltage specifications, current rating, and thermal characteristics. No circuit modifications are required.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates a lead-free (no-lead) component manufactured to RoHS3 compliance standards. This affects material composition but not electrical performance or pin compatibility.

Q: Are there differences in thermal performance between these parts?

A: No. Both parts operate across the identical temperature range of -40°C to 125°C (junction temperature) and share the same TO-220-7 package, which determines thermal characteristics.

Q: What packaging considerations apply to the LM2676T-3.3/NOPB?

A: The LM2676T-3.3/NOPB is supplied in tube packaging, suitable for automated pick-and-place assembly. Verify that your assembly process supports tube-packaged through-hole components.

Q: Why is the original LM2676T-3.3 marked as obsolete?

A: Product obsolescence typically reflects manufacturer discontinuation decisions. The LM2676T-3.3/NOPB remains in active production and serves as the current equivalent for this functional specification.