TL431S

{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431s",
  "title": "TL431S",
  "brief": "UMW Voltage Reference, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "tl431s",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TL431S",
    "manufacturer": "UMW",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757111679618289664",
    "parts": {
      "symbol": "tl431s.kicad_sym",
      "footprint": "tl431s.kicad_mod",
      "model_3d": "tl431s-hero.glb",
      "model_3d_plain": "tl431s.glb",
      "model_3d_step": "tl431s-etched.step",
      "model_3d_step_plain": "tl431s.step",
      "lbr": "tl431s.lbr"
    },
    "distributor_links": {
      "lcsc": "C4944984"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T14:50:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input that sets the output voltage via an external resistor divider; reference input current range is 0.05 to 10 mA (absolute maximum)."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "power_in",
        "description": "Anode terminal, connected to ground in typical shunt regulator circuits."
      },
      {
        "number": "3",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode terminal that sinks 0.5 mA to 100 mA recommended and up to 36 V recommended (40 V absolute maximum VKA)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: SOT-89 pin assignment read from the page 1 package drawing (1=REF, 2=ANODE, 3=CATHODE). The ordering",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 11,
        "cost_usd": 0.1448,
        "at": "2026-10-09T14:47:34"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757111679618289664",
        "pages": 11,
        "sha256": "7c8052c62fb0f6ba",
        "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"
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431s-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
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        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "632c8ac751b81ddfb5a2b3980122c39cf4392809e55264acc0ed97f94127b0f5",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOT-89-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "7c8052c62fb0f6ba",
      "rows": [
        {
          "name": "Cathode Voltage",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current Range (Continuous)",
          "symbol": "IK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Range",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": 0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "Toper.",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Voltage",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current",
          "symbol": "IK",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 0.5,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage (0.5% grade)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.483,
          "typ": 2.495,
          "max": 2.508,
          "conditions": "TA=25°C, VKA=VREF, IK=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Voltage Over Full Temperature Range",
          "symbol": "VREF(dev)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 17,
          "conditions": "Tmin≤Ta≤Tmax",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 4,
          "conditions": "R1=10KΩ, R2=∞",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Current Over Full Temperature Range",
          "symbol": "IREF(dev)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "Tmin≤Ta≤Tmax, R1=10KΩ, R2=∞",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "ZKA",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.27,
          "max": null,
          "conditions": "IK=1mA to 100mA, f≤1.0KHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance From Junction to Ambient in Free Air (SOT-89)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 400,
          "max": null,
          "conditions": "Free air, component mounted on high effective thermal conductivity test board",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "readme",
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  "discovery_triggers": [
    "tl431s"
  ],
  "discovery_pitch": "TL431S (UMW) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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    "tl431s.lbr",
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    "viewers/footprint.html",
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  "visibility": {
    "public": true
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}