LM3676SD-1.8 Equivalent & Substitute Parts

Part Overview

The LM3676SD-1.8 is a buck switching regulator IC from Texas Instruments designed for positive fixed 1.8V output applications. This device delivers 600mA output current with a 2MHz switching frequency and integrated synchronous rectification. The main part is classified as obsolete, which necessitates identification of active equivalent alternatives to ensure design continuity and procurement availability for new production runs and field replacements.

Substiute Parts

LM3676SD-1.8

Texas InstrumentsIn Stock: 3486LM3676SD-1.8 Datasheet

Current PartRFQ

LM3676SD-1.8/NOPB

Texas InstrumentsIn Stock: 1961LM3676SD-1.8/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3676SD-1.8 is determined by strict equivalence across the following critical parameters:

• Output voltage: 1.8V fixed
• Output current capability: 600mA minimum
• Input voltage range: 2.9V to 5.5V
• Switching topology: Buck converter
• Synchronous rectification: Required
• Package footprint: 8-WFDFN Exposed Pad (8-WSON 3x3)
• Mounting type: Surface Mount
• Operating temperature range: -30°C to 85°C

The LM3676SD-1.8/NOPB qualifies as a direct equivalent substitute based on identical electrical specifications and mechanical compatibility. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The LM3676SD-1.8/NOPB is the direct equivalent substitute for the obsolete LM3676SD-1.8. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility.

Selection between these parts is determined by regulatory and procurement requirements:

• For new designs and production requiring RoHS3 compliance, the LM3676SD-1.8/NOPB is the appropriate choice.
• The LM3676SD-1.8/NOPB is supplied in Tape & Reel packaging, suitable for automated assembly processes.
• The obsolete status of LM3676SD-1.8 restricts its use to legacy system maintenance where existing inventory remains available.

Both parts maintain identical performance characteristics across input voltage range, output current delivery, switching frequency, and thermal operating limits.

Frequently Asked Questions (FAQ)

Q: Can LM3676SD-1.8/NOPB be used as a direct replacement for LM3676SD-1.8?

A: Yes. Both parts are electrically and mechanically identical. The LM3676SD-1.8/NOPB is the active production equivalent with RoHS3 compliance certification.

Q: What is the difference between LM3676SD-1.8 and LM3676SD-1.8/NOPB?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and packaging format (bulk vs. Tape & Reel). Electrical and mechanical specifications are identical.

Q: Are there any package footprint differences between these parts?

A: No. Both parts use the 8-WFDFN Exposed Pad package with 8-WSON (3x3) supplier device package designation. PCB layout and assembly processes remain unchanged.

Q: What is the output current capability of this regulator?

A: The LM3676SD-1.8 and LM3676SD-1.8/NOPB both deliver 600mA output current at the fixed 1.8V output voltage.

Q: What input voltage range is supported?

A: Both parts accept input voltages from 2.9V to 5.5V, with a fixed 1.8V output across this range.

Q: Is RoHS compliance required for my application?

A: If RoHS3 compliance is mandatory, use LM3676SD-1.8/NOPB. The original LM3676SD-1.8 is RoHS non-compliant and should be reserved for legacy applications where compliance exemptions apply.