78D08L

{
  "schema_version": 1,
  "type": "component",
  "slug": "78d08l",
  "title": "78D08L",
  "brief": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "pmic",
    "78d08l"
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  "component": {
    "mpn": "78D08L",
    "manufacturer": "UMW",
    "package": "TO-252-2",
    "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--78D08L_C347286.pdf",
    "parts": {
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      "footprint": "78d08l.kicad_mod",
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      "lbr": "78d08l.lbr"
    },
    "distributor_links": {
      "lcsc": "C347286"
    },
    "pins": [
      {
        "number": "1",
        "name": "INPUT",
        "type": "power_in",
        "description": "Unregulated positive supply input. Absolute maximum V_I = 35 V (V_O ≤ 18 V variants). Recommended operating input range for the 78D08 is 10.5 V to 23 V (to guarantee regulation at 1 A) and up to 25 V per line-regulation spec. A 0.33 µF ceramic input bypass capacitor (C_IN) to GND is required close to the pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground reference for the regulator and its reference-voltage divider. On the TO-252 package this pin is electrically connected to the exposed tab/heat slug, which should be soldered to a copper pour for heat-sinking (θ_JC = 12.5 °C/W)."
      },
      {
        "number": "3",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated +8 V output (7.68-8.32 V typ. at Tj=25°C, 7.6-8.4 V over I_O = 5 mA-1 A, V_I = 10.5-23 V). Delivers up to 1 A continuous (I_SC ≈ 800 mA, I_PK ≈ 1.3 A). Dropout voltage V_D ≈ 2 V at I_O = 500 mA. A 0.1 µF ceramic output capacitor (C_OUT) to GND is required for loop stability."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2403220120_UMW-Youtai-Semiconductor-Co---Ltd--78D08L_C347286.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": {
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      "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"
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
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        "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": "78d08l-etched.step",
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        "centre_offset_mm": 0.0,
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        "sha256": "57aaf4fc23f02049effb15b6280d1fd09873ca2245d542b8d0484a343f955113",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Unknown",
      "Package": "TO-252-2",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "0816f246cc64ec64",
      "rows": [
        {
          "name": "Output Voltage (TJ=25°C)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 7.68,
          "typ": 8,
          "max": 8.32,
          "conditions": "25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (full range)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 7.6,
          "typ": null,
          "max": 8.4,
          "conditions": "IO=5mA~1A, VI=10.5~23V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VI=10.5V~25V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VI=11V~25V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 160,
          "conditions": "IO=5mA~500mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "IO=5mA~200mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "IO=5mA~350mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "IO=200mA, VI=10.5~25V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "TJ=25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "DC Input Voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "for VO=5 to 18 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction to Case (TO-251/TO-252)",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 12.5,
          "max": null,
          "conditions": "TO-251/TO-252 package",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "78D08L (Unknown) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "updated_at": "2026-09-24T15:20:05.522Z"
}