main
Ray Set visibility: public 34d18c3 16d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "mc78m12btg",
  "title": "MC78M12BTG",
  "brief": "onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. 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)",
    "mc78m12btg",
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    "extractor-text"
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  "component": {
    "mpn": "MC78M12BTG",
    "manufacturer": "onsemi",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895227713368064",
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    "distributor_links": {
      "lcsc": "C179583",
      "digikey": "MC78M12BTGOS-ND"
    },
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      "checked_at": "2026-10-19T11:01:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MC78M12BTGOS-ND",
        "status": "found"
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      "mouser": {
        "pn": null,
        "status": "quota"
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    "pins": [
      {
        "number": "1",
        "name": "Input",
        "type": "power_in",
        "description": "Unregulated input voltage; the maximum input voltage for the 5.0 V to 18 V option is 35 Vdc, and a 0.33 µF or larger low-impedance bypass capacitor should be mounted directly across the input when wire lengths are long or the output load capacitance is large."
      },
      {
        "number": "2",
        "name": "Ground",
        "type": "power_in",
        "description": "Common ground reference for the regulator; the heatsink surface of the TO-220 package is connected to this pin."
      },
      {
        "number": "3",
        "name": "Output",
        "type": "power_out",
        "description": "Regulated 12 V output with internal current limiting; short-circuit current limit is 350 mA typical and peak output current is 700 mA typical at TJ = 25°C, with a maximum output of 500 mA with adequate heatsinking."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "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's pinout block lists only pins 1 (Input), 2 (Ground) and 3 (Output) for the TO-220 pac; The output pin description cites the 350 mA short-circuit limit and 700 mA peak current from the 12 "
        ],
        "pages_sent": 15,
        "cost_usd": 0.0981,
        "at": "2026-10-19T11:00:57"
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        "pages": 15,
        "sha256": "2339bbc0a38dcd3b",
        "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": "mc78m12btg.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "ef594e991501e5428ec76949fef5950f87f7f6d1f7353ff5709f5309a47f5206",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "TO-220",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2339bbc0a38dcd3bb30a9e8922c56d8d7f1dea569c4c11177e3c313905d58e56",
      "rows": [
        {
          "name": "Output Voltage (TJ = 25°C), MC78M12B/MC78M12C/NCV78M12B column",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "Vdc",
          "min": 11.5,
          "typ": 12,
          "max": 12.5,
          "conditions": "TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Variation, MC78M12B column",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "Vdc",
          "min": 11.4,
          "typ": null,
          "max": 12.6,
          "conditions": "14.5 Vdc ≤ VI ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 350 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "Regline",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 8,
          "max": 50,
          "conditions": "TJ = 25°C, 14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "Regload",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 25,
          "max": 240,
          "conditions": "TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "Regload",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 10,
          "max": 120,
          "conditions": "TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current",
          "symbol": "IIB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.2,
          "max": 6,
          "conditions": "TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "IIB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "IIB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "5.0 mA ≤ IO ≤ 350 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": 55,
          "typ": null,
          "max": null,
          "conditions": "IO = 100 mA, f = 120 Hz, 15 V ≤ VI ≤ 25 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": 55,
          "typ": 80,
          "max": null,
          "conditions": "IO = 300 mA, f = 120 Hz, 15 V ≤ VI ≤ 25 V, TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage (5.0 V−18 V option)",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "Input voltage rating for 5.0 V−18 V option",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Noise Voltage",
          "symbol": "Vn",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "TA = 25°C, 10 Hz ≤ f ≤ 100 kHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VI−VO",
          "kind": "electrical",
          "unit": "Vdc",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short Circuit Current Limit",
          "symbol": "IOS",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 350,
          "max": null,
          "conditions": "TJ = 25°C, VI = 35 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Average Temperature Coefficient of Output Voltage",
          "symbol": "VO/T",
          "kind": "temperature_coefficient",
          "unit": "mV/°C",
          "min": -0.3,
          "typ": null,
          "max": 0.3,
          "conditions": "IO = 5.0 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Peak Output Current",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 700,
          "max": null,
          "conditions": "TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range (MC78M12BTG ordering)",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "TJ = −40° to +125°C per ordering table for MC78M12BTG",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "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": "Thermal Resistance, Junction-to-Air (T Suffix, TO-220)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 70,
          "max": null,
          "conditions": "T Suffix (TO-220 package)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Case (T Suffix, TO-220)",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "T Suffix (TO-220 package)",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "MC78M12BTG (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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