LM2672MX-3.3 Equivalent & Substitute Parts

Part Overview

The LM2672MX-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 1A current capacity. The device operates across a 6.5V to 40V input range with a switching frequency of 260kHz and is housed in an 8-SOIC surface mount package.

The LM2672MX-3.3 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM2672MX-3.3

Texas InstrumentsIn Stock: 9380LM2672MX-3.3 Datasheet

Current PartRFQ

LM2672MX-3.3/NOPB

Texas InstrumentsIn Stock: 7627LM2672MX-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2672MX-3.3 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (3.3V fixed)
• Output current rating (1A minimum)
• Input voltage operating range (6.5V to 40V)
• Switching frequency (260kHz)
• Package type and pinout (8-SOIC, 0.154" width)
• Topology (buck converter, non-synchronous rectifier)
• Operating temperature range (-40°C to 125°C)

The LM2672MX-3.3/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and compliance certification level.

Parameter Comparison

Engineering Selection Recommendations

The LM2672MX-3.3/NOPB is the appropriate selection for new designs and component replenishment. This part maintains identical electrical and mechanical specifications to the obsolete LM2672MX-3.3 while offering the following advantages:

• Active product status with ongoing manufacturing support
• ROHS3 compliance certification, meeting current environmental and regulatory requirements
• Availability in flexible packaging formats (Cut Tape and Digi-Reel®) suitable for both prototype and production volumes
• Equivalent pinout and package footprint, enabling direct PCB layout compatibility

For existing designs currently using the LM2672MX-3.3, migration to the LM2672MX-3.3/NOPB requires no circuit modifications or PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the LM2672MX-3.3/NOPB be used as a direct replacement for the LM2672MX-3.3?

A: Yes. Both parts share identical electrical specifications, output voltage (3.3V), output current (1A), input voltage range (6.5V to 40V), switching frequency (260kHz), and 8-SOIC package configuration. No circuit or layout modifications are required.

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

A: The "/NOPB" designation indicates the part is supplied in Cut Tape (CT) and Digi-Reel® packaging formats without lead (Pb) plating, reflecting RoHS3 compliance.

Q: Why is the LM2672MX-3.3 listed as obsolete?

A: Obsolete status indicates Texas Instruments has discontinued active manufacturing and support for this specific part number variant. The LM2672MX-3.3/NOPB represents the current active equivalent.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the same temperature range (-40°C to 125°C junction temperature) and deliver identical switching frequency (260kHz) and current output (1A).

Q: What are the package compatibility considerations?

A: Both parts use the 8-SOIC package with 0.154" width and identical pinout. PCB footprints, component placement, and routing are fully compatible.

Q: Is RoHS compliance a functional requirement for substitution?

A: RoHS compliance is a regulatory and supply chain consideration. The LM2672MX-3.3/NOPB's ROHS3 compliance ensures compatibility with current manufacturing standards and environmental regulations, making it the preferred choice for new applications.