LM317BD2TR4G

{
  "slug": "lm317bd2tr4g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm317bd2tr4g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm317bd2tr4g.kicad_sym",
    "lm317bd2tr4g.kicad_mod",
    "lm317bd2tr4g.glb",
    "lm317bd2tr4g.step",
    "lm317bd2tr4g.lbr",
    "docs/hero.png",
    "docs/lm317bd2tr4g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm317bd2tr4g-hero.glb",
    "lm317bd2tr4g-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM317BD2TR4G",
    "manufacturer": "onsemi",
    "package": "TO-263-2",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588885197182423040",
    "parts": {
      "symbol": "lm317bd2tr4g.kicad_sym",
      "footprint": "lm317bd2tr4g.kicad_mod",
      "model_3d": "lm317bd2tr4g-hero.glb",
      "model_3d_plain": "lm317bd2tr4g.glb",
      "model_3d_step": "lm317bd2tr4g-etched.step",
      "model_3d_step_plain": "lm317bd2tr4g.step",
      "lbr": "lm317bd2tr4g.lbr"
    },
    "distributor_links": {
      "lcsc": "C173771",
      "digikey": "LM317BD2TR4GOSTR-ND",
      "mouser": "863-LM317BD2TR4G"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T13:21:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM317BD2TR4GOSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-LM317BD2TR4G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Adjust",
        "type": "passive",
        "description": "The adjustment terminal sets the output voltage through the external R1/R2 divider, with adjust current IAdj controlled to less than 100 µA, and it may be bypassed to ground with a CAdj (for example 10 µF) to improve ripple rejection."
      },
      {
        "number": "2",
        "name": "Vout",
        "type": "power_out",
        "description": "This is the regulated output, which is adjustable from 1.2 V to 37 V and is electrically connected to the heatsink surface of the package."
      },
      {
        "number": "3",
        "name": "Vin",
        "type": "power_in",
        "description": "This is the unregulated input, with an input-output differential rating of −0.3 V to 40 Vdc and regulation specified for 3.0 V ≤ VI−VO ≤ 40 V."
      }
    ],
    "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: Package hint says TO-263-2, but the datasheet gives this part as D2PAK-3 (D2T suffix, Case 936) and ; The datasheet numbers only pins 1 to 3. The heatsink tab is labeled 'terminal 4' in the case outline; The datasheet does not give ERC types. Adjust is set to passive as a judgment call, and Vout and Vin"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0701,
        "at": "2026-10-09T13:19:32"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588885197182423040",
        "pages": 12,
        "sha256": "752b2a8373998f8d",
        "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": "lm317bd2tr4g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15.0,
          10.0,
          4.42
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "804a3f76e4182a02567b2429bdc9a585b857158fb8543fccd29c8eb6780e1310",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm317bd2tr4g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15.0,
          10.0,
          4.42
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5fb0b21c6ec5307b6041370e64ea3c83ac7195f5de1225e607a51e319ca316a7",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}