LM317MBSTT3G

{
  "slug": "lm317mbstt3g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm317mbstt3g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm317mbstt3g.kicad_sym",
    "lm317mbstt3g.kicad_mod",
    "lm317mbstt3g.glb",
    "lm317mbstt3g.step",
    "lm317mbstt3g.lbr",
    "docs/hero.png",
    "docs/lm317mbstt3g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm317mbstt3g-hero.glb",
    "lm317mbstt3g-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM317MBSTT3G",
    "manufacturer": "onsemi",
    "package": "SOT-223-4",
    "pin_count": 4,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586200285946007552",
    "parts": {
      "symbol": "lm317mbstt3g.kicad_sym",
      "footprint": "lm317mbstt3g.kicad_mod",
      "model_3d": "lm317mbstt3g-hero.glb",
      "model_3d_plain": "lm317mbstt3g.glb",
      "model_3d_step": "lm317mbstt3g-etched.step",
      "model_3d_step_plain": "lm317mbstt3g.step",
      "lbr": "lm317mbstt3g.lbr"
    },
    "distributor_links": {
      "lcsc": "C152536",
      "digikey": "LM317MBSTT3GOSTR-ND",
      "mouser": "863-LM317MBSTT3G"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T12:22:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM317MBSTT3GOSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-LM317MBSTT3G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Adjust",
        "type": "passive",
        "description": "Adjustment terminal across which the internal 1.25 V reference appears; adjust pin current is controlled to less than 100 µA, and an optional bypass capacitor to ground improves ripple rejection."
      },
      {
        "number": "2",
        "name": "Vout",
        "type": "power_out",
        "description": "Regulated output terminal, 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 terminal; the input-to-output voltage differential must not exceed 40 V."
      },
      {
        "number": "4",
        "name": "Heatsink tab",
        "type": "passive",
        "description": "Heatsink surface shown as terminal 4 in the case outline drawing, electrically connected to pin 2 (Vout)."
      }
    ],
    "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 text of the PIN ASSIGNMENT drawing is garbled: the labels 'Vin Adjust Vout' do not lin; Pin 4 is the heatsink tab from the case outline; the datasheet says it is connected to pin 2 but doe; The output schema has no field for specs, so the headline ratings (output 1.2 V to 37 V, input-outpu"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0815,
        "at": "2026-10-09T12:20:50"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586200285946007552",
        "pages": 14,
        "sha256": "e5fe58e7a6060e1f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "lm317mbstt3g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          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": "lm317mbstt3g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.5,
          1.7
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "586d83e96e9eac466aebf1eb070b760b5c16d19f758b09266c04152d865d9db9",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}