78D09L

{
  "schema_version": 1,
  "type": "component",
  "slug": "78d09l",
  "title": "78D09L",
  "brief": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "78d09l"
  ],
  "component": {
    "mpn": "78D09L",
    "manufacturer": "UMW",
    "package": "TO-252",
    "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/2403220120_UMW-Youtai-Semiconductor-Co---Ltd--78D09L_C347287.pdf",
    "parts": {
      "symbol": "78d09l.kicad_sym",
      "footprint": "78d09l.kicad_mod",
      "model_3d": "78d09l-etched.glb",
      "model_3d_plain": "78d09l.glb",
      "model_3d_step": "78d09l-etched.step",
      "model_3d_step_plain": "78d09l.step",
      "lbr": "78d09l.lbr"
    },
    "distributor_links": {
      "lcsc": "C347287"
    },
    "pins": [
      {
        "number": "1",
        "name": "INPUT",
        "type": "power_in",
        "description": "Unregulated DC input supply. For a 9 V output, typical VI = 15 V (recommended VI range 11.5-24 V, absolute max 35 V). A 0.33 µF input bypass capacitor to GND is recommended close to the pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground / reference for both input and output. On the TO-252 package this pin is electrically common with the exposed thermal tab, which also serves as the primary heat-sink pad."
      },
      {
        "number": "3",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated +9 V output, up to 1 A load current (VO typ 9 V, 8.64-9.36 V at 25 °C). A 0.1 µF output capacitor to GND close to the pin is recommended for stability. Internally protected against short circuit (~800 mA into a shorted load) and thermal overload."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2403220120_UMW-Youtai-Semiconductor-Co---Ltd--78D09L_C347287.pdf",
        "pages": 15,
        "sha256": "0816f246cc64ec64",
        "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": [
        -5.04,
        -2.28
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TO-252-2@sha256:18c28e5e147d5e9b",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "78d09l.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "78d09l-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "cf08c61314655e86aeb6dc89698c6372bc5d4bd349871c519aba577867e37c7c",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Unknown",
      "Package": "TO-252",
      "Category": "PMIC",
      "Pins": "3"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "78d09l"
  ],
  "discovery_pitch": "78D09L (Unknown) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "78d09l.kicad_sym",
    "78d09l.kicad_mod",
    "78d09l.glb",
    "78d09l.step",
    "78d09l-etched.step",
    "78d09l.lbr",
    "docs/hero.png",
    "docs/78d09l-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "updated_at": "2026-09-24T15:20:14.816Z"
}