L78L12ABUTR

{
  "schema_version": 1,
  "type": "component",
  "slug": "l78l12abutr",
  "title": "L78L12ABUTR",
  "brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. 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",
    "l78l12abutr"
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  "component": {
    "mpn": "L78L12ABUTR",
    "manufacturer": "STMicroelectronics",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://www.st.com/resource/en/datasheet/l78l12abutr.pdf",
    "parts": {
      "symbol": "l78l12abutr.kicad_sym",
      "footprint": "l78l12abutr.kicad_mod",
      "model_3d": "l78l12abutr-etched.glb",
      "model_3d_plain": "l78l12abutr.glb",
      "model_3d_step": "l78l12abutr-etched.step",
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      "lbr": "l78l12abutr.lbr"
    },
    "distributor_links": {
      "digikey": "497-7768-2-ND",
      "lcsc": "C915681"
    },
    "pins": [
      {
        "number": "1",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated +12 V output. Deliver up to 100 mA. Recommended output decoupling capacitor 0.1 µF to GND for stability and transient response."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground / reference return. On SOT-89 this is the large center pad, tied to the die attach flag for thermal dissipation, so bond to a copper pour for heat-sinking."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated DC input. Absolute maximum 35 V (for 12-15 V output variants). Recommended input decoupling capacitor 0.33 µF placed close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/l78l12abutr.pdf",
        "pages": 45,
        "sha256": "43922ae159face7e",
        "source_tier": "mfr"
      },
      "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": [
        -1.95,
        -1.5
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-89-3@sha256:0b8db9f4a8f2547a",
      "mark": "drawn"
    },
    "models_3d": [
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        "file": "l78l12abutr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
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        "sha256": "55276958dcfd92094fad73127c804ba51e7f4e8fabaeeb309d0d26ca1c992bab",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOT-89-3",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "43922ae159face7e",
      "rows": [
        {
          "name": "Output voltage (TJ = 25 °C)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.5,
          "typ": 12,
          "max": 12.5,
          "conditions": "TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 11.4,
          "typ": null,
          "max": 12.6,
          "conditions": "IO = 1 to 40 mA, VI = 14.5 to 27 V",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage rejection",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": 37,
          "typ": 42,
          "max": null,
          "conditions": "VI = 15 to 25 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Absolute maximum DC input voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "VO = 12 to 15 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TOP",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "for L78LxxAB",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-ambient (SOT-89)",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 55,
          "conditions": "Considering 6 cm² copper board heat-sink",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "VI = 14.5 to 27 V, TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "VI = 16 to 27 V, TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "IO = 1 to 100 mA, TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "IO = 1 to 40 mA, TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6.5,
          "max": null,
          "conditions": "TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6,
          "max": null,
          "conditions": "TJ = 125 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change",
          "symbol": "∆Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "IO = 1 to 40 mA",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change",
          "symbol": "∆Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "VI = 16 to 27 V",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Output noise voltage",
          "symbol": "eN",
          "kind": "electrical",
          "unit": "µV",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "B = 10 Hz to 100 kHz, TJ = 25 °C",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "Vd",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.7,
          "max": null,
          "conditions": "",
          "source_page": 21,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "L78L12ABUTR (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
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  "variants": [
    {
      "mpn": "L78L12ABUTR",
      "kind": "packaging"
    },
    {
      "mpn": "L78L12ACUTR",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ABZ",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ACZ",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ABZ-AP",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ACZ-AP",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ACZ-TR",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ABD-TR",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12ACD13TR",
      "kind": "unknown"
    },
    {
      "mpn": "L78L12CD13TR",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-24T23:35:48.719Z"
}