component
LM2679S-3.3
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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README.mdadded+44@@ -0,0 +1,44 @@+# LM2679S-3.3++**Texas Instruments** · DC-DC Converters · TO-263-7++LM2679S-3.3 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; it connects to the inductor and the cathode of the external diode. |+| 2 | Input | input | Supply input pin to the collector of the high-side FET; connect to the power supply and input bypass capacitor CIN, keeping the path from VIN to CIN and GND as short as possible. |+| 3 | CB | input | Bootstrap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the VSW (switch output) pin. |+| 4 | GND | power_in | Power ground pin; connect to system ground, with the ground pins of CIN and COUT and the path to CIN kept as short as possible. |+| 5 | Current adjust | input | Current limit adjust pin; connect a resistor from this pin to GND to set the current limit of the part. |+| 6 | FB | input | Feedback sense input; connect to the midpoint of the feedback divider to set VOUT for the adjustable version, or connect directly to the output capacitor for a fixed-output version such as the 3.3-V LM2679S-3.3. |+| 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 the feature 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: `LM2679S-3.3`+- Footprint: `Package_TO_SOT_SMD:TO-263-7_TabPin8`+- 3D model: TO-263-7 (KiCad packages3D, STEP)+- 3D model files: `lm2679s-3-3-etched.step` / `lm2679s-3-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2679s-3-3.step` / `lm2679s-3-3.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 2026-10-08, 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/lm2679s-3-3-datasheet.pdf)
page.jsonadded+202@@ -0,0 +1,202 @@+{+ "slug": "lm2679s-3-3",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lm2679s-3.3",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm2679s-3-3.kicad_sym",+ "lm2679s-3-3.kicad_mod",+ "lm2679s-3-3.glb",+ "lm2679s-3-3.step",+ "lm2679s-3-3.lbr",+ "docs/hero.png",+ "docs/lm2679s-3-3-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "lm2679s-3-3-hero.glb",+ "lm2679s-3-3-hero.overlay.json"+ ],+ "component": {+ "mpn": "LM2679S-3.3",+ "manufacturer": "Texas Instruments",+ "package": "TO-263-7",+ "pin_count": 8,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm2679",+ "parts": {+ "symbol": "lm2679s-3-3.kicad_sym",+ "footprint": "lm2679s-3-3.kicad_mod",+ "model_3d": "lm2679s-3-3-hero.glb",+ "model_3d_plain": "lm2679s-3-3.glb",+ "model_3d_step": "lm2679s-3-3-etched.step",+ "model_3d_step_plain": "lm2679s-3-3.step",+ "lbr": "lm2679s-3-3.lbr"+ },+ "distributor_links": {+ "lcsc": "C2865761",+ "digikey": "2156-LM2679S-3.3-14-ND",+ "mouser": "926-LM2679S-33"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T16:37:48Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "2156-LM2679S-3.3-14-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "926-LM2679S-33",+ "status": "found",+ "lifecycle": "Obsolete"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "Switch output",+ "type": "output",+ "description": "Source pin of the internal high-side FET and the switching node; it connects to the inductor and the cathode of the external diode."+ },+ {+ "number": "2",+ "name": "Input",+ "type": "input",+ "description": "Supply input pin to the collector of the high-side FET; connect to the power supply and input bypass capacitor CIN, keeping the path from VIN to CIN and GND as short as possible."+ },+ {+ "number": "3",+ "name": "CB",+ "type": "input",+ "description": "Bootstrap capacitor connection for the high-side driver; connect a high-quality 100-nF capacitor from CB to the VSW (switch output) pin."+ },+ {+ "number": "4",+ "name": "GND",+ "type": "power_in",+ "description": "Power ground pin; connect to system ground, with the ground pins of CIN and COUT and the path to CIN kept as short as possible."+ },+ {+ "number": "5",+ "name": "Current adjust",+ "type": "input",+ "description": "Current limit adjust pin; connect a resistor from this pin to GND to set the current limit of the part."+ },+ {+ "number": "6",+ "name": "FB",+ "type": "input",+ "description": "Feedback sense input; connect to the midpoint of the feedback divider to set VOUT for the adjustable version, or connect directly to the output capacitor for a fixed-output version such as the 3.3-V LM2679S-3.3."+ },+ {+ "number": "7",+ "name": "SS",+ "type": "input",+ "description": "Soft-start pin; connect a capacitor from this pin to GND to control the output voltage ramp, or leave it floating if the feature is not wanted."+ },+ {+ "number": "8",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The TO-263 pin numbers are taken from the 'Pin Functions' table (TO-263/TO-220 columns), which match; The datasheet does not state how the TO-263 tab (heat-sink) is connected. The only DAP instruction i; Pin types are mapped to KiCad classes from the datasheet's I/O column: O -> output, I -> input, and ",+ "exposed pad 8 added from the footprint"+ ],+ "pages_sent": 9,+ "cost_usd": 0.0616,+ "at": "2026-10-08T16:37:33"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm2679",+ "pages": 38,+ "sha256": "e875ecde9bd514b4",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 8,+ "described": 8,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "lm2679s-3-3.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 15,+ 10,+ 4.42+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "34b8121b216e7b6490402befe573a69b06919acafd33d6e8da88bd238574da52",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lm2679s-3-3-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 15,+ 10,+ 4.42+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "cb2b10a71d2a986ef80b744b4e97186d141d9d681a27690fb219e2b6cadab2ff",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}