Texas Instruments LM2673SDX
LM2673SDX variants from Texas Instruments
LM2673SDX Overview
What changes between part numbers, and what to check before you lock the BOM — Microcontrollers.
LM2673SDX is a Texas Instruments order-code family — not a single orderable MPN. This page lists 2 variants that share the same core device but differ in suffix fields (package, grade, reel/tube, electrical bin, etc.). Pick the exact full part number; substituting within the family without checking the datasheet often causes assembly or spec mismatches.
8V to 40V, 3A SIMPLE SWITCHER® buck converter with adjustable current limit 14-VSON -40 to 125 Other listed variants describe: Package: 14-VDFN Exposed Pad | Mounting Type: Surface Mount | Number of Outputs: 1 | Operating Temperature: -40°C ~ 125°C (TJ).
Across listed variants, watch these parameters: packages: 14-VDFN Exposed Pad.
Suffix examples in this family: 3.3/NOPB, 5.0/NOPB. The characters after the base number usually encode package, temperature, or performance grade — compare the variant table column-by-column rather than assuming pin-compatible drops-in.
Example MPNs: LM2673SDX-3.3/NOPB, LM2673SDX-5.0/NOPB.
Key Features
- Footprint / package: 14-VDFN Exposed PadSingle package option across listed variants; still confirm reel vs tube suffix if you auto-insert.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 2 distinct suffix patternsExamples: 3.3/NOPB, 5.0/NOPB. Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- Microcontrollers — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 2 LM2673SDX part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| LM2673SDX-3.3/NOPB | 8V to 40V, 3A SIMPLE SWITCHER® buck converter with adjustable current limit 14-VSON -40 to 125 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM2673SDX-5.0/NOPB | Package: 14-VDFN Exposed Pad | Mounting Type: Surface Mount | Number of Outputs: 1 | Operating Temperature: -40°C ~ 125°C (TJ) | 14-VDFN Exposed Pad | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on LM2673SDX map to package, grade, and reel options.
LM2673SDX uses a shared prefix; characters after the prefix encode orderable options. Two lines with the same prefix are not drop-in replacements unless the differing columns match your need.
Suffixes seen here: 3.3/NOPB, 5.0/NOPB.
Full MPN examples: LM2673SDX-3.3/NOPB, LM2673SDX-5.0/NOPB.
Tip: photograph or copy the reel label — reel diameter, QTY per reel, and moisture sensitivity level (MSL) are often suffix-driven and won't show in the schematic.
How to Choose the Right LM2673SDX Microcontrollers
Match the footprint first
Packages here: 14-VDFN Exposed Pad. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For LM2673SDX, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "LM2673SDX" — include the full suffix (e.g. 3.3/NOPB, 5.0/NOPB). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for LM2673SDX product family
Identity
Variant Parameters
Source LM2673SDX with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from Texas Instruments. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the LM2673SDX product family.