component
LM2673SX-ADJ
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM2673SX-ADJ
Texas Instruments · DC-DC Converters · TO-263-7
LM2673SX-ADJ from Texas Instruments, in a TO-263-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Switch output | output | Source pin of the internal High Side FET and switching node; attach to an inductor and the cathode of the external diode. |
| 2 | Input | power_in | Supply input pin to collector pin of high side FET; connect to power supply and input bypass capacitors CIN with path to ground as short as possible. |
| 3 | CB | input | Bootstrap capacitor connection for high-side driver; connect a high quality 100-nF capacitor from CB to Switch output pin. |
| 4 | GND | power_in | Power ground pin; connect to system ground and ground pins of CIN and COUT with path to CIN as short as possible. |
| 5 | Current adjust | input | Current Limit adjust pin; connect a resistor from this pin to ground to set the current limit per ICL equals 37,125 divided by RADJ in amperes. |
| 6 | FB | input | Feedback sense input pin; connect to the midpoint of feedback divider to set VOUT for adjustable version or directly to output capacitor for fixed versions. |
| 7 | SS | input | Soft-start pin; connect a capacitor from this pin to ground to control output voltage ramp, or leave floating if soft-start feature is not desired. |
| 8 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-263-7 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM2673SX-ADJ - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lm2673sx-adj-etched.step/lm2673sx-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2673sx-adj.step/lm2673sx-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (38 pp, sha256
0d2838b8538afc10, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).