LM431BIM

{
  "slug": "lm431bim",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm431bim",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm431bim.kicad_sym",
    "lm431bim.kicad_mod",
    "lm431bim.glb",
    "lm431bim.step",
    "lm431bim.lbr",
    "docs/hero.png",
    "docs/lm431bim-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm431bim-hero.glb",
    "lm431bim-hero.overlay.json",
    "lm431bim-etched.glb"
  ],
  "component": {
    "mpn": "LM431BIM",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8770707402721107968",
    "parts": {
      "symbol": "lm431bim.kicad_sym",
      "footprint": "lm431bim.kicad_mod",
      "model_3d": "lm431bim-hero.glb",
      "model_3d_plain": "lm431bim-etched.glb",
      "model_3d_step": "lm431bim-etched.step",
      "model_3d_step_plain": "lm431bim.step",
      "lbr": "lm431bim.lbr"
    },
    "distributor_links": {
      "lcsc": "C7432347",
      "digikey": "2156-LM431BIM-ND",
      "mouser": "926-LM431BIM"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:50:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM431BIM-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "926-LM431BIM",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode (K) of the shunt regulator; output terminal, adjustable from Vref (about 2.5V) up to 36V, with an absolute maximum VKA of 37V and IKA up to 150mA continuous."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode (A) of the shunt regulator, connected to the most negative supply/ground potential."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode (A) of the shunt regulator, connected to the most negative supply/ground potential."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "6",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode (A) of the shunt regulator, connected to the most negative supply/ground potential."
      },
      {
        "number": "7",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode (A) of the shunt regulator, connected to the most negative supply/ground potential."
      },
      {
        "number": "8",
        "name": "REF",
        "type": "input",
        "description": "Reference input of the shunt regulator with nominal Vref of 2.495V (LM431B: 2.470V to 2.520V) and reference input current up to 10mA absolute maximum."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet draws four ANODE pins (2, 3, 6, 7) and does not say whether they are internally tied t; The ordering table lists LM431BIM/TR in SOP-8. The MPN LM431BIM is taken to be this part, with B gra",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 9,
        "cost_usd": 0.2287,
        "at": "2026-10-18T03:47:49"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8770707402721107968",
        "pages": 9,
        "sha256": "7e234b72ffe30494",
        "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": "lm431bim.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm431bim-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f3c93ec5befbe7ebffb5973335e4f984189f6dd0414d5fffcba21c0e1458033e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}