main
Ray Set visibility: public 64e4fb7 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "l78l12a",
  "title": "L78L12A",
  "brief": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "l78l12a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "L78L12A",
    "manufacturer": "UMW",
    "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/8755873186757906432",
    "parts": {
      "symbol": "l78l12a.kicad_sym",
      "footprint": "l78l12a.kicad_mod",
      "model_3d": "l78l12a-hero.glb",
      "model_3d_plain": "l78l12a-etched.glb",
      "model_3d_step": "l78l12a-etched.step",
      "model_3d_step_plain": "l78l12a.step",
      "lbr": "l78l12a.lbr"
    },
    "distributor_links": {
      "lcsc": "C19725468"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:49:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated 12V output of the 78L12A, rated for up to 100mA maximum output current, with a 0.1µF output capacitor recommended."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package."
      },
      {
        "number": "8",
        "name": "INPUT",
        "type": "power_in",
        "description": "Unregulated supply input, absolute maximum 35V for output voltages of 3.3 to 18V, with a 0.33µF input capacitor recommended."
      }
    ],
    "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: Pin assignment is read from the SOP-8 drawing on page 1 (pins 1-4 left, 8-5 right). The datasheet do",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 22,
        "cost_usd": 0.2276,
        "at": "2026-10-18T03:47:08"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755873186757906432",
        "pages": 22,
        "sha256": "3eeae843c9f51425",
        "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": "l78l12a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "l78l12a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "eaee4445e36cfa9e9fcc52f771628a1d6ba3f3e7a583709be1680955f16aab7c",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "3eeae843c9f51425701e772141305fd91cdc2c4852164bce9d098801795607e3",
      "rows": [
        {
          "name": "Output voltage (A grade, TJ=25°C)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.76,
          "typ": 12,
          "max": 12.24,
          "conditions": "TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Output voltage (A grade, line range, IO=1mA~40mA)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.64,
          "typ": 12,
          "max": 12.36,
          "conditions": "14.5V≤VI≤27V,IO=1mA~40mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Output voltage (A grade, line range, IO=1mA~70mA)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.64,
          "typ": 12,
          "max": 12.36,
          "conditions": "14.5V≤VI≤VMAX,IO=1mA~70mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "Iq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change (line)",
          "symbol": "ΔIq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "16V≤VI≤27V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change (load)",
          "symbol": "ΔIq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "1mA≤IO≤40mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "TJ=25°C, IO=1mA~100mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 75,
          "conditions": "TJ=25°C, IO=1mA~70mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "14.5V ≤VI≤27V,TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "16V ≤VI≤27V,TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "for VO=3.3 to 18V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature range",
          "symbol": "TOPR",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -20,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "SOP-8 package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output noise voltage",
          "symbol": "VN",
          "kind": "electrical",
          "unit": "µV",
          "min": null,
          "typ": 36,
          "max": null,
          "conditions": "10Hz ≤f≤100kHz",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Temperature coefficient of VO",
          "symbol": "ΔVO/ΔT",
          "kind": "temperature_coefficient",
          "unit": "mV/°C",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "IO=5mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Ripple rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 42,
          "max": null,
          "conditions": "15V≤VI≤25V,f=120Hz,TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "Vd",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.7,
          "max": null,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "l78l12a"
  ],
  "discovery_pitch": "L78L12A (UMW) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
  },
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    "l78l12a.step",
    "l78l12a.lbr",
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    "viewers/symbol.html",
    "viewers/footprint.html",
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    "l78l12a-hero.overlay.json",
    "l78l12a-etched.glb"
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  "visibility": {
    "public": true
  }
}