TL431AQDBVR

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  "title": "TL431AQDBVR",
  "brief": "Texas Instruments Voltage Reference, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "subcategory": "Voltage Reference",
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        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the TL431 (not TL432) SOT-23-5 (DBV) package, per the pin configuration diagram for TL431, TL431A, TL431B ... DBV."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No functional internal connection; this pin is attached to the die substrate and, per the datasheet footnote, must be connected to ANODE or left open."
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      {
        "number": "3",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt-regulator I/O (cathode) pin that sinks the parallel current; recommended continuous cathode current is 1 mA to 100 mA while VKA is regulated between Vref (~2.5 V) and 36 V (absolute maximum continuous cathode current −100 mA to 150 mA, absolute maximum VKA 37 V)."
      },
      {
        "number": "4",
        "name": "REF",
        "type": "input",
        "description": "Reference/threshold input measured relative to the common ANODE pin; typical reference input current is 2 µA (max 4 µA) at IKA=10 mA, with an absolute maximum reference input current range of −0.05 mA to 10 mA."
      },
      {
        "number": "5",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common pin that is normally connected to ground/return, forming the current path back from CATHODE through the internal regulator."
      }
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        "at": "2026-09-23T10:47:59"
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      "Manufacturer": "Texas Instruments",
      "Package": "SOT-23-5",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
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    "characteristics": {
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          "name": "Reference voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "mV",
          "min": 2470,
          "typ": 2495,
          "max": 2520,
          "conditions": "VKA = Vref, IKA = 10mA",
          "source_page": 12,
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        {
          "name": "Cathode current, continuous (recommended)",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
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          "typ": null,
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        {
          "name": "Operating free-air temperature, TL43xxQ grade",
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          "unit": "°C",
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          "name": "Reference input current (absolute maximum)",
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          "kind": "absolute_maximum",
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          "min": -0.05,
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          "max": 10,
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        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
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        },
        {
          "name": "Reference input voltage deviation over full temperature range",
          "symbol": "VI(dev)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 14,
          "max": 34,
          "conditions": "VKA = Vref, IKA = 10mA",
          "source_page": 12,
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        },
        {
          "name": "Ratio of reference voltage change to cathode voltage change",
          "symbol": "ΔVref / ΔVKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "ΔVKA = 10V - Vref, IKA = 10mA",
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        },
        {
          "name": "Ratio of reference voltage change to cathode voltage change",
          "symbol": "ΔVref / ΔVKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "ΔVKA = 36V - 10V, IKA = 10mA",
          "source_page": 12,
          "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": 12,
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        {
          "name": "Reference input current deviation over full temperature range",
          "symbol": "II(dev)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.8,
          "max": 2.5,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = ∞",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 0.7,
          "conditions": "VKA = Vref",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Off-state cathode current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.1,
          "max": 0.5,
          "conditions": "VKA = 36V, Vref = 0",
          "source_page": 12,
          "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": 12,
          "source": "datasheet"
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        {
          "name": "Cathode voltage (recommended; minimum is Vref, not a number)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
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          "source_page": 6,
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        {
          "name": "Cathode voltage (absolute maximum)",
          "symbol": "VKA",
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          "name": "Operating junction temperature range (absolute maximum)",
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          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 206,
          "max": null,
          "conditions": "DBV (SOT-23-5) package column",
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        {
          "name": "Junction-to-case (top) thermal resistance",
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          "typ": 131,
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