TL431ILPR

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  "title": "TL431ILPR",
  "brief": "Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "TL431ILPR",
    "manufacturer": "Texas Instruments",
    "package": "TO-92-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tl431",
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    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Parallel current/voltage input (cathode, K); the terminal whose regulated voltage VKA is programmed from Vref (~2.5V) up to 36V by external resistors, requires a minimum regulating cathode current Imin of 0.4-1mA and is rated for a recommended continuous cathode current of 1mA to 100mA, with absolute maximum ratings of 37V cathode voltage and -100mA to 150mA cathode current."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "output",
        "description": "Common pin (anode, A), normally connected to ground/circuit common; provides the return path for the cathode current and is the reference node for the external feedback resistor divider."
      },
      {
        "number": "3",
        "name": "REF",
        "type": "input",
        "description": "Reference/threshold input pin (measured relative to the common anode) that is internally compared to the device's ~2.5V bandgap reference; must be supplied with a reference input current of at least a few µA (typ. 2µA, max 4µA at IKA=10mA) and cannot be left floating, with an absolute maximum reference input current range of -0.05mA to 10mA."
      }
    ],
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        "cost_usd": 0.9756,
        "at": "2026-09-23T16:52:22"
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        "described": 3,
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        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TO-92-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Reference voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "mV",
          "min": 2440,
          "typ": 2495,
          "max": 2550,
          "conditions": "VKA = Vref, IKA = 10mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Reference input voltage deviation over temperature range (all devices other than SOT23-3 and TL432)",
          "symbol": "VI(dev)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 5,
          "max": 50,
          "conditions": "VKA = Vref, IKA = 10mA",
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        {
          "name": "Ratio of change in reference voltage to change in cathode voltage",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IKA = 10mA; ΔVKA = 10V - Vref",
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        {
          "name": "Ratio of change in reference voltage to change in cathode voltage",
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          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IKA = 10mA; ΔVKA = 36V - 10V",
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        },
        {
          "name": "Reference input current",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "µA",
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        {
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          "symbol": "II(dev)",
          "kind": "electrical",
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          "max": 2.5,
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        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 1,
          "conditions": "VKA = Vref",
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        },
        {
          "name": "Off-state cathode current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.1,
          "max": 1,
          "conditions": "VKA = 36V, Vref = 0",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Dynamic impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.2,
          "max": 0.5,
          "conditions": "VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA",
          "source_page": 8,
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        },
        {
          "name": "Cathode voltage",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
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          "typ": null,
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        },
        {
          "name": "Continuous cathode current range",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
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          "max": 100,
          "conditions": "",
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        },
        {
          "name": "Operating free-air temperature range (TL43xxI)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Natural air convection; TL43xxI",
          "source_page": 6,
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        {
          "name": "Cathode voltage",
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          "kind": "absolute_maximum",
          "unit": "V",
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        {
          "name": "Reference input current",
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        {
          "name": "Operating junction temperature range",
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          "name": "Storage temperature range",
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        {
          "name": "Junction-to-ambient thermal resistance (LP package, TO-92)",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 140,
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  "updated_at": "2026-09-25T09:58:48.752Z"
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