TL431AQDBZT

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  "slug": "tl431aqdbzt",
  "title": "TL431AQDBZT",
  "brief": "Texas Instruments Voltage Reference, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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    "mpn": "TL431AQDBZT",
    "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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    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "passive",
        "description": "Shunt regulator cathode (K). Sinks 1-100 mA of cathode current when REF exceeds Vref (~2.5 V) - absolute-max continuous IKA = -100 to +150 mA, VKA(max) = 37 V, VKA(recommended) = Vref to 36 V. Output dynamic impedance is typ 0.2 Ω."
      },
      {
        "number": "2",
        "name": "REF",
        "type": "input",
        "description": "Reference (feedback) input, threshold relative to ANODE. Internal comparator drives the shunt on when V(REF) ≥ Vref (nominal 2.5 V). Reference input current range -0.05 mA to +10 mA (absolute max); tie to divider tap between CATHODE and ANODE to program the regulated voltage."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common anode / return terminal - the reference point for VKA and Vref. Tie to system ground in the standard shunt-regulator topology."
      }
    ],
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        "url": "https://www.ti.com/cn/lit/gpn/tl431",
        "pages": null,
        "sha256": "0eb18c491f5517a3",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
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        "refuses_to_fabricate": true
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          3.0,
          1.2
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-23-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    }
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    {
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    {
      "mpn": "TL431AQDBZTD",
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    {
      "mpn": "TL431AQDBZTP",
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    {
      "mpn": "TL431AQDBZTPS",
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    {
      "mpn": "TL431AQDBZTPW",
      "kind": "packaging"
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  "discovery_pitch": "TL431AQDBZT (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-25T09:55:47.443Z"
}