LR78L09A

{
  "schema_version": 1,
  "type": "component",
  "slug": "lr78l09a",
  "title": "LR78L09A",
  "brief": "LRC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "lr78l09a"
  ],
  "component": {
    "mpn": "LR78L09A",
    "manufacturer": "LRC",
    "package": "SOT-89",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2206071616_LRC-LR78L09A_C2986735.pdf",
    "parts": {
      "symbol": "lr78l09a.kicad_sym",
      "footprint": "lr78l09a.kicad_mod",
      "model_3d": "lr78l09a-etched.glb",
      "model_3d_plain": "lr78l09a.glb",
      "model_3d_step": "lr78l09a-etched.step",
      "model_3d_step_plain": "lr78l09a.step",
      "lbr": "lr78l09a.lbr"
    },
    "distributor_links": {
      "lcsc": "C2986735"
    },
    "pins": [
      {
        "number": "1",
        "name": "Vout",
        "type": "power_out",
        "description": "Regulated +9 V output. Typical 9.0 V (min 8.64 V, max 9.36 V at Tj=25°C). Supplies up to 100 mA. A 0.1 µF bypass capacitor to GND close to the pin is recommended for stability and transient response."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / common return. On SOT-89 this pin is electrically tied to the large center tab used as the thermal pad."
      },
      {
        "number": "3",
        "name": "Vin",
        "type": "power_in",
        "description": "Unregulated input voltage. Absolute max 30 V for the 9 V option; recommended range 11.5 V to 24 V. Dropout ~1.7 V typical. A 0.33 µF bypass capacitor to GND close to the pin is recommended."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2206071616_LRC-LR78L09A_C2986735.pdf",
        "pages": 8,
        "sha256": "e540f0f8c27d9693",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.95,
        -1.5
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-89-3@sha256:0b8db9f4a8f2547a",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "lr78l09a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lr78l09a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "b4aed6aeca4874dd2803d5ea2333463d59e7b89daf7613e505c97d898ae7ea97",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LRC",
      "Package": "SOT-89",
      "Category": "PMIC",
      "Pins": "3"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lr78l09a"
  ],
  "discovery_pitch": "LR78L09A (LRC) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lr78l09a.kicad_sym",
    "lr78l09a.kicad_mod",
    "lr78l09a.glb",
    "lr78l09a.step",
    "lr78l09a.lbr",
    "docs/hero.png",
    "docs/lr78l09a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lr78l09a-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LR78L09A",
      "kind": "packaging"
    },
    {
      "mpn": "LR78L09B",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-28T18:07:17.367Z"
}