component
LM2673SX-12
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.
main
LM2673SX-12
Texas Instruments · DC-DC Converters · TO-263-7
LM2673SX-12 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 the switching node; attach it to the inductor and the cathode of the external diode. |
| 2 | Input | input | Supply input to the collector of the high-side FET; connect to the supply and input bypass capacitor CIN with a path to GND as short as possible, within the 8 V to 40 V recommended supply range. |
| 3 | CB | input | Boot-strap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the switch (VSW) pin. |
| 4 | GND | power_in | Power ground; connect to system ground along with the CIN and COUT grounds, keeping the path to CIN as short as possible. |
| 5 | Current_adjust | input | Current-limit adjust; connect a resistor from this pin to GND to set the switch peak current limit, which is programmable over a 2 A to 5 A range. |
| 6 | FB | input | Feedback sense input; connect to the midpoint of the feedback divider for the adjustable version, or directly to the output capacitor for fixed-output versions. |
| 7 | SS | input | Soft-start pin; connect a capacitor from this pin to GND to control the output voltage ramp, or leave it floating if soft-start is not wanted (absolute maximum pin voltage −0.1 V to 6 V). |
| 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-12 - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lm2673sx-12-etched.step/lm2673sx-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2673sx-12.step/lm2673sx-12.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 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).
# LM2673SX-12
**Texas Instruments** · DC-DC Converters · TO-263-7
LM2673SX-12 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 the switching node; attach it to the inductor and the cathode of the external diode. |
| 2 | Input | input | Supply input to the collector of the high-side FET; connect to the supply and input bypass capacitor CIN with a path to GND as short as possible, within the 8 V to 40 V recommended supply range. |
| 3 | CB | input | Boot-strap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the switch (VSW) pin. |
| 4 | GND | power_in | Power ground; connect to system ground along with the CIN and COUT grounds, keeping the path to CIN as short as possible. |
| 5 | Current_adjust | input | Current-limit adjust; connect a resistor from this pin to GND to set the switch peak current limit, which is programmable over a 2 A to 5 A range. |
| 6 | FB | input | Feedback sense input; connect to the midpoint of the feedback divider for the adjustable version, or directly to the output capacitor for fixed-output versions. |
| 7 | SS | input | Soft-start pin; connect a capacitor from this pin to GND to control the output voltage ramp, or leave it floating if soft-start is not wanted (absolute maximum pin voltage −0.1 V to 6 V). |
| 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-12`
- Footprint: `Package_TO_SOT_SMD:TO-263-7_TabPin8`
- 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files: `lm2673sx-12-etched.step` / `lm2673sx-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2673sx-12.step` / `lm2673sx-12.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm2673) (38 pp, sha256 `0d2838b8538afc10`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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).
[Datasheet PDF](docs/lm2673sx-12-datasheet.pdf)