TL431BQDBZR

{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431bqdbzr",
  "title": "TL431BQDBZR",
  "brief": "Texas Instruments Voltage Reference, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management (pmic)",
    "tl431bqdbzr"
  ],
  "component": {
    "mpn": "TL431BQDBZR",
    "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",
    "parts": {
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      "footprint": "tl431bqdbzr.kicad_mod",
      "model_3d": "tl431bqdbzr-etched.glb",
      "model_3d_plain": "tl431bqdbzr.glb",
      "model_3d_step": "tl431bqdbzr-etched.step",
      "model_3d_step_plain": "tl431bqdbzr.step",
      "lbr": "tl431bqdbzr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "passive",
        "description": "Shunt cathode (K). Shunt current/voltage input; connects to the load via a series resistor. Sinks 1 mA to 100 mA when regulating; cathode voltage is set by the divider that drives REF to Vref (~2.5 V)."
      },
      {
        "number": "2",
        "name": "REF",
        "type": "input",
        "description": "Reference input to the internal error amplifier. Compared against the internal ~2.5 V bandgap reference; connect to the tap of the external resistor divider from CATHODE to ANODE to program the regulated cathode voltage."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Shunt anode (A). Common return, normally tied to circuit ground."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tl431",
        "pages": 86,
        "sha256": "0eb18c491f5517a3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tl431bqdbzr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "16964b14f93e6c778288a0c110b35f670fab733109c26f0da7dfc07cc3350040",
        "checked": "2026-10-07",
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      },
      {
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        "seat": "z = 0",
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        "zmin_mm": 0.0,
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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"
    }
  },
  "variants": [
    {
      "mpn": "TL431BQDBZR",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRDBZT",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRDBVR",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRDBVT",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRDR",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRD",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRP",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRPS",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRPWR",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRPW",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRLP",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRLPR",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRLPM",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRDCKR",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRDCKT",
      "kind": "packaging"
    },
    {
      "mpn": "TL431BQDBZRPK",
      "kind": "packaging"
    }
  ],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
    "tl431bqdbzr"
  ],
  "discovery_pitch": "TL431BQDBZR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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    "tl431bqdbzr.step",
    "tl431bqdbzr.lbr",
    "docs/hero.png",
    "docs/tl431bqdbzr-datasheet.pdf",
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    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T09:56:45.178Z"
}