LM2931AD50R

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2931ad50r",
  "title": "LM2931AD50R",
  "brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2931ad50r"
  ],
  "component": {
    "mpn": "LM2931AD50R",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588879859115941888",
    "parts": {
      "symbol": "lm2931ad50r.kicad_sym",
      "footprint": "lm2931ad50r.kicad_mod",
      "model_3d": "lm2931ad50r-etched.glb",
      "model_3d_plain": "lm2931ad50r.glb",
      "model_3d_step": "lm2931ad50r-etched.step",
      "model_3d_step_plain": "lm2931ad50r.step",
      "lbr": "lm2931ad50r.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 5.0 V output. Typical 5.0 V (min 4.75 V, max 5.25 V) at IO = 100 mA over the full VI = 6 to 26 V and TJ = -40 to 125 °C range. Requires a ≥100 µF output capacitor for stability."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / reference return."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / reference return (tied internally to the other GND pins; multiple GND pins aid heat sinking on SO-8)."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the fixed-output version (LM2931AD50R). This pin serves as the ADJ feedback input only on the adjustable (LM2931D-R) variant; leave floating on this part."
      },
      {
        "number": "5",
        "name": "INHIBIT",
        "type": "input",
        "description": "Active-high shutdown / inhibit logic input. Regulator is enabled when VINH < 1.2 V (VIL) and disabled when VINH > 3.25 V (VIH). Inhibit input current IINH ≈ 22 µA typ (50 µA max) at VINH = 2.5 V. Absolute maximum inhibit input voltage is 40 V."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / reference return (tied internally to the other GND pins)."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / reference return (tied internally to the other GND pins)."
      },
      {
        "number": "8",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated supply input. Recommended operating range 6 V to 26 V (max operating 26 V min); tolerates transient input up to 60 V (T < 100 ms) and reverse polarity down to -15 V DC / -50 V transient. Decouple with a 0.1 µF input capacitor. Absolute maximum DC input voltage 40 V."
      }
    ],
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
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      {
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "07bd8d19d77c6060",
      "rows": [
        {
          "name": "Maximum operating input voltage",
          "symbol": "VI",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 26,
          "conditions": "IO = 10 mA, TJ = -40 to 125 °C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 4.81,
          "typ": 5,
          "max": 5.19,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 4.75,
          "typ": 5,
          "max": 5.25,
          "conditions": "IO = 100 mA, VI = 6 to 26 V, TJ = -40 to 125°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "DVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 10,
          "conditions": "VI = 9 to 16 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "DVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 4,
          "max": 30,
          "conditions": "VI = 6 to 26 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "DVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 15,
          "max": 50,
          "conditions": "IO = 5 to 100 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "Vd",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 90,
          "max": 200,
          "conditions": "IO = 10 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "Vd",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 250,
          "max": 600,
          "conditions": "IO = 100 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current ON MODE",
          "symbol": "Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.5,
          "max": 30,
          "conditions": "ON MODE IO = 100 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current OFF MODE",
          "symbol": "Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 1,
          "conditions": "OFF MODE VINH = 2.5 V, RLOAD = 500 Ω",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Short circuit current",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 100,
          "max": 300,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage rejection",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": 55,
          "typ": 75,
          "max": null,
          "conditions": "IO = 100 mA, VI = 14 ± 2 V, f = 120 Hz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Control input voltage low",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "TJ = -40 to 125 °C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Control input voltage high",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 3.25,
          "conditions": "TJ = -40 to 125 °C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Inhibit input current",
          "symbol": "IINH",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 22,
          "max": 50,
          "conditions": "VINH = 2.5 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Transient input voltage",
          "symbol": "VI",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 60,
          "max": 70,
          "conditions": "RLOAD = 500 Ω, Ƭ < 100 ms",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Reverse polarity input voltage",
          "symbol": "VI",
          "kind": "electrical",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": -15,
          "conditions": "VO = ± 0.3 V, RLOAD = 500 Ω",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Reverse polarity input voltage transient",
          "symbol": "VI",
          "kind": "electrical",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "RLOAD = 500 Ω, Ƭ < 100 ms",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output noise voltage",
          "symbol": "eN",
          "kind": "electrical",
          "unit": "µVRMS",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "B = 10 Hz to 100 kHz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "DC positive input voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC reverse input voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -15,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Transient input voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 60,
          "conditions": "Ƭ < 100 ms",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Transient reverse input voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "Ƭ < 100 ms",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Inhibit input voltage",
          "symbol": "VINH",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TOP",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-case (SO-8)",
          "symbol": "RthJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-ambient (SO-8)",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 55,
          "max": null,
          "conditions": "Note (1): considering 6 cm2 of copper board heat-sink",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [
    {
      "mpn": "LM2931AD50R",
      "kind": "packaging"
    },
    {
      "mpn": "LM2931AD33R",
      "kind": "unknown"
    },
    {
      "mpn": "LM2931D-R",
      "kind": "unknown"
    },
    {
      "mpn": "LM2931ADT50R",
      "kind": "unknown"
    },
    {
      "mpn": "LM2931ADT50RY",
      "kind": "unknown"
    },
    {
      "mpn": "LM2931ADT33RY",
      "kind": "unknown"
    },
    {
      "mpn": "LM2931AZ50R",
      "kind": "unknown"
    }
  ],
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  "discovery_pitch": "LM2931AD50R (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-28T16:30:06.444Z"
}