LM2931

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2931",
  "title": "LM2931",
  "brief": "TI automotive low-dropout regulator, TO-220. 100 mA, load-dump and reverse-battery protected, low quiescent. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power",
    "ldo",
    "linear-regulator",
    "automotive",
    "to-220",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LM2931",
    "manufacturer": "Texas Instruments",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Power Management",
    "subcategory": "LDO regulator",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm2931-n.pdf",
    "parts": {
      "symbol": "lm2931.kicad_sym",
      "footprint": "lm2931.kicad_mod",
      "model_3d": "lm2931-etched.glb",
      "model_3d_plain": "lm2931.glb",
      "model_3d_step": "lm2931-etched.step",
      "model_3d_step_plain": "lm2931.step",
      "lbr": "lm2931.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "power_in",
        "description": "Unregulated input, operating range up to 26 V (survives 50 V load dump on LM2931-N, 60 V on LM2931A/C). A 0.1 µF bypass is required if the regulator is remote from the supply filter."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / return. In TO-220 and DDPAK/TO-263, the tab is electrically connected to GND."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated output. Delivers fixed 3.3 V or 5 V (±3.8% for A grade) at up to 100 mA. Requires ≥100 µF low-ESR output capacitor for stability."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm2931-n.pdf",
        "pages": 35,
        "sha256": "45c959192188b8f1",
        "source_tier": "mfr"
      },
      "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": "lm2931.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2931-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "8ef442dfa782a0fab6522445a0e42eb94e96ad1320f75f7cddf8cb53c11a3529",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Low-dropout regulator (automotive)",
      "Output current": "100 mA",
      "Dropout": "< 0.6 V",
      "Transient survival": "Load dump to 60 V, reverse battery to -50 V",
      "Quiescent current": "Low (~0.4 mA)",
      "Output": "3.3 V (fixed option)",
      "Package": "TO-220"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm2931",
    "automotive ldo",
    "load dump regulator",
    "reverse battery protected regulator"
  ],
  "discovery_pitch": "TI LM2931 automotive low-dropout regulator (TO-220) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm2931.kicad_sym",
    "lm2931.kicad_mod",
    "lm2931.glb",
    "lm2931.step",
    "lm2931.lbr",
    "docs/hero.png",
    "docs/lm2931-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2931-etched.step"
  ],
  "variants": [
    {
      "mpn": "LM2931T-3.3 (TO-220)",
      "kind": "packaging"
    },
    {
      "mpn": "LM2931AT-5.0 (TO-220)",
      "kind": "packaging"
    },
    {
      "mpn": "LM2931D (SOIC-8)",
      "kind": "packaging"
    }
  ]
}