LM2679S-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2679s-3-3",
  "title": "LM2679S-3.3",
  "brief": "Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2679s-3.3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TO-263-7",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm2679s-3.3"
  ],
  "discovery_pitch": "LM2679S-3.3 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "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"
  ],
  "visibility": {
    "public": true
  }
}