main
Ray Set visibility: public 5df7b9b 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lr78m12d",
  "title": "LR78M12D",
  "brief": "LRC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management (pmic)",
    "lr78m12d",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "LR78M12D",
    "manufacturer": "LRC",
    "package": "TO-252",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603113896077381632",
    "parts": {
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      "footprint": "lr78m12d.kicad_mod",
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      "lbr": "lr78m12d.lbr"
    },
    "distributor_links": {
      "lcsc": "C2986736"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T23:37:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "INPUT",
        "type": "input",
        "description": "Unregulated input to the regulator; the absolute maximum input voltage is 35 V for the 5 V to 18 V output versions (40 V for 24 V)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the regulator, shown as pin 2 in the pin assignment; the datasheet gives no separate electrical rating for it."
      },
      {
        "number": "3",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated 12 V output for the LR78M12, specified at 11.5 V to 12.5 V (11.4 V to 12.6 V over line) with output current up to 0.5 A."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet lists the LR78M12D (D-PAK) in the ordering table on page 11, and the D-PAK pin assignm; The datasheet does not state whether the D-PAK tab is internally connected to any pin, so no tab pin; The 35 V and 40 V input ratings are the datasheet's absolute maximum ratings for the whole series, n"
        ],
        "pages_sent": 11,
        "cost_usd": 0.038,
        "at": "2026-10-17T23:34:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603113896077381632",
        "pages": 11,
        "sha256": "48b0ea17bd097b96",
        "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"
    },
    "models_3d": [
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        "file": "lr78m12d.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lr78m12d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "79e24565e767d88ab4103d454bbdfe578976aa6d02c2da2e9a08d371f6beeb84",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LRC",
      "Package": "TO-252",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "48b0ea17bd097b9639c5308fcf29a7d4cc39820cd42ba8ac3228faeb7f49f500",
      "rows": [
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.5,
          "typ": 12,
          "max": 12.5,
          "conditions": "TJ = +25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.4,
          "typ": 12,
          "max": 12.6,
          "conditions": "IO = 5mA to 350mA, VI = 14.5V to 27V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "IO = 200mA, TJ = +25°C, VI = 14.5V to 30V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "IO = 200mA, TJ = +25°C, VI = 16V to 30V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 240,
          "conditions": "IO = 5mA to 0.5A, TJ = +25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 120,
          "conditions": "IO = 5mA to 200mA, TJ = +25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4.1,
          "max": 6,
          "conditions": "TJ = +25°C",
          "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 to 350mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "VI = 14.5V to 30V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage (for VO = 5V to 18V)",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "for VO = 5V to 18V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "Tj",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature",
          "symbol": "TOPR",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Drift",
          "symbol": "ΔV/ΔT",
          "kind": "temperature_coefficient",
          "unit": "mV/°C",
          "min": null,
          "typ": -0.5,
          "max": null,
          "conditions": "IO = 5mA, TJ = 0 to +125°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Noise Voltage",
          "symbol": "VN",
          "kind": "electrical",
          "unit": "μV/Vo",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "f = 10Hz to 100kHz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "f = 120Hz, IO = 300mA, VI = 15V to 25V, TJ = +25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "TJ = +25°C, IO = 500mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Short Circuit Current",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 300,
          "max": null,
          "conditions": "TJ = +25°C, VI = 35V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Peak Current",
          "symbol": "IPK",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 700,
          "max": null,
          "conditions": "TJ = +25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-Air (D-PAK)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 92,
          "max": null,
          "conditions": "D-PAK, Ta = +25°C; Note 1 (JESD51-3/-7 test board), Note 2 (no ambient airflow)",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "lr78m12d"
  ],
  "discovery_pitch": "LR78M12D (LRC) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
    "public": true
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}