main
Ray tl431cdbzr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) 8bef3a8 25d ago
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  "slug": "tl431cdbzr",
  "title": "TL431CDBZR",
  "brief": "Texas Instruments Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "TL431CDBZR",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tl431",
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        "number": "1",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt regulator current/voltage node (I/O): cathode voltage VKA is recommended to range from Vref to 36V with continuous cathode current IKA of 1mA to 100mA (absolute maximum VKA=37V, IKA=-100mA to 150mA); minimum regulated cathode current Imin is 0.4-1mA depending on grade."
      },
      {
        "number": "2",
        "name": "REF",
        "type": "input",
        "description": "Reference input (I) that sets the threshold voltage relative to the common ANODE; the internal 2.5V (nominal 2440-2550mV depending on grade) reference requires a reference input current Iref of typically 2µA (max 4µA) and must not be left floating since absolute maximum reference input current range is -0.05mA to 10mA."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "output",
        "description": "Common pin (O) of the device, typically connected to circuit ground, providing the return path for the cathode and reference currents."
      }
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        "cost_usd": 1.001,
        "at": "2026-09-23T02:40:58"
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        "pages": 86,
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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        "checked": "2026-10-07",
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-23-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
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    "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": 7,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage deviation over temperature range (SOT23-3)",
          "symbol": "VI(dev)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 6,
          "max": 16,
          "conditions": "VKA = Vref,IKA = 10mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Ratio of reference voltage change to cathode voltage change",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IKA = 10mA,ΔVKA = 10V - Vref",
          "source_page": 7,
          "source": "datasheet"
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          "name": "Ratio of reference voltage change to cathode voltage change",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IKA = 10mA,ΔVKA = 36V - 10V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Reference input current",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 4,
          "conditions": "IKA = 10mA,R1 = 10kΩ,R2 = ∞",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Reference input current deviation over temperature range",
          "symbol": "II(dev)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "IKA = 10mA,R1 = 10kΩ,R2 = ∞",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 1,
          "conditions": "VKA = Vref",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "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": 7,
          "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 至 100mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Minimum printed as Vref (not a number)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current range",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature range (TL43xxC)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "TL43xxC, free-air",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current range",
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          "min": -100,
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          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reference input current",
          "symbol": "II(ref)",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
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          "unit": "°C",
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          "conditions": "",
          "source_page": 6,
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        {
          "name": "Storage temperature range",
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          "unit": "°C",
          "min": -65,
          "typ": null,
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          "conditions": "",
          "source_page": 6,
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        },
        {
          "name": "Junction-to-ambient thermal resistance (DBZ, SOT-23-3)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 206,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case (top) thermal resistance (DBZ, SOT-23-3)",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 76,
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          "source_page": 6,
          "source": "datasheet"
        }
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