LM317MSTT3G

{
  "slug": "lm317mstt3g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi DC-DC Converters, SOT-223-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm317mstt3g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm317mstt3g.kicad_sym",
    "lm317mstt3g.kicad_mod",
    "lm317mstt3g.glb",
    "lm317mstt3g.step",
    "lm317mstt3g.lbr",
    "docs/hero.png",
    "docs/lm317mstt3g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm317mstt3g-hero.glb",
    "lm317mstt3g-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM317MSTT3G",
    "manufacturer": "onsemi",
    "package": "SOT-223-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835572945444864",
    "parts": {
      "symbol": "lm317mstt3g.kicad_sym",
      "footprint": "lm317mstt3g.kicad_mod",
      "model_3d": "lm317mstt3g-hero.glb",
      "model_3d_plain": "lm317mstt3g.glb",
      "model_3d_step": "lm317mstt3g-etched.step",
      "model_3d_step_plain": "lm317mstt3g.step",
      "lbr": "lm317mstt3g.lbr"
    },
    "distributor_links": {
      "lcsc": "C894888",
      "digikey": "LM317MSTT3GOSTR-ND",
      "mouser": "863-LM317MSTT3G"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T13:16:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM317MSTT3GOSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-LM317MSTT3G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJUST",
        "type": "input",
        "description": "Adjustment terminal sets the output voltage through the R1/R2 divider; IAdj is controlled to less than 100 µA, and an optional CAdj from this pin to ground improves ripple rejection."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output of the adjustable regulator, adjustable from 1.2 V to 37 V and capable of supplying more than 500 mA; the heatsink surface is connected to this pin."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input supply; the input-output voltage differential must not exceed 40 Vdc, and a 0.1 µF input bypass capacitor (Cin) is recommended when the regulator is far from the supply filter."
      }
    ],
    "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 extracted pin-assignment text lists the labels 'Vin Adjust Vout' next to the numbers '1 2 3' wit; The datasheet describes the heatsink surface as terminal 4 in the case outline drawing, connected to"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0946,
        "at": "2026-10-09T13:14:29"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835572945444864",
        "pages": 16,
        "sha256": "353819a8f6b59994",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm317mstt3g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.5,
          1.7
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm317mstt3g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1cdc70f70d7908e5e069671b6f6c6109d24aa947813d1700a2f8389c84d96785",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}