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LM2679SX-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.
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LM2679SX-12
Texas Instruments · DC-DC Converters · TO-263-7
LM2679SX-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, which connects to the inductor and the cathode of the external diode. |
| 2 | Input | input | Supply input to the collector of the high-side FET, which must be bypassed with CIN with the VIN-to-CIN-to-GND path kept as short as possible; the recommended supply range is 8 V to 40 V. |
| 3 | CB | input | Bootstrap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the switch output pin. |
| 4 | GND | power_in | Power ground that must be connected to system ground, with the path to CIN kept as short as possible. |
| 5 | Current_adjust | input | Current-limit adjust pin; a resistor from this pin to GND sets the peak current limit, which the datasheet specifies over a 3 A to 7 A range. |
| 6 | FB | input | Feedback sense input; for the fixed 12-V version this pin is connected directly to the output capacitor. |
| 7 | SS | input | Soft-start pin; a capacitor from this pin to GND controls the output voltage ramp, and the pin may be left floating if soft-start is not wanted. |
| 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:
LM2679SX-12 - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lm2679sx-12-etched.step/lm2679sx-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2679sx-12.step/lm2679sx-12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (38 pp, sha256
e875ecde9bd514b4, retrieved 2026-10-07, 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).
# LM2679SX-12
**Texas Instruments** · DC-DC Converters · TO-263-7
LM2679SX-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, which connects to the inductor and the cathode of the external diode. |
| 2 | Input | input | Supply input to the collector of the high-side FET, which must be bypassed with CIN with the VIN-to-CIN-to-GND path kept as short as possible; the recommended supply range is 8 V to 40 V. |
| 3 | CB | input | Bootstrap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the switch output pin. |
| 4 | GND | power_in | Power ground that must be connected to system ground, with the path to CIN kept as short as possible. |
| 5 | Current_adjust | input | Current-limit adjust pin; a resistor from this pin to GND sets the peak current limit, which the datasheet specifies over a 3 A to 7 A range. |
| 6 | FB | input | Feedback sense input; for the fixed 12-V version this pin is connected directly to the output capacitor. |
| 7 | SS | input | Soft-start pin; a capacitor from this pin to GND controls the output voltage ramp, and the pin may be left floating if soft-start is not wanted. |
| 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: `LM2679SX-12`
- Footprint: `Package_TO_SOT_SMD:TO-263-7_TabPin8`
- 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files: `lm2679sx-12-etched.step` / `lm2679sx-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2679sx-12.step` / `lm2679sx-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/lm2679) (38 pp, sha256 `e875ecde9bd514b4`, retrieved 2026-10-07, 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/lm2679sx-12-datasheet.pdf)