main
Ray Set visibility: public 5bab87a 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431g-ae3-r",
  "title": "TL431G-AE3-R",
  "brief": "UTC Unisonic Tech Voltage Reference, SOT-23. 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)",
    "tl431g-ae3-r",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TL431G-AE3-R",
    "manufacturer": "UTC Unisonic Tech",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586180042657304576",
    "parts": {
      "symbol": "tl431g-ae3-r.kicad_sym",
      "footprint": "tl431g-ae3-r.kicad_mod",
      "model_3d": "tl431g-ae3-r-hero.glb",
      "model_3d_plain": "tl431g-ae3-r-etched.glb",
      "model_3d_step": "tl431g-ae3-r-etched.step",
      "model_3d_step_plain": "tl431g-ae3-r.step",
      "lbr": "tl431g-ae3-r.lbr"
    },
    "distributor_links": {
      "lcsc": "C71130"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T00:47:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K",
        "type": "passive",
        "description": "Cathode terminal of the shunt regulator; cathode voltage must stay between VREF and 36 V (37 V absolute maximum), with cathode current of 1 to 100 mA recommended and -100 to +150 mA absolute maximum."
      },
      {
        "number": "2",
        "name": "R",
        "type": "input",
        "description": "Reference input, nominally about 2.5 V (VREF), used with an external resistor divider to set the output voltage; reference input current is rated -0.05 to +10 mA absolute maximum."
      },
      {
        "number": "3",
        "name": "A",
        "type": "passive",
        "description": "Anode terminal, the common return for the cathode current; the minimum cathode current for regulation is 0.3 to 0.5 mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin mapping for TL431G-AE3-R (SOT-23) comes from the ordering table on page 1, where the pin-code ro; KiCad pin types are not stated by the datasheet. Cathode and anode are set to passive, and the refer; Pin descriptions combine ratings from the electrical and absolute-maximum tables with the functional"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0338,
        "at": "2026-10-18T00:45:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586180042657304576",
        "pages": 6,
        "sha256": "cbc7e42ea3607271",
        "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": "tl431g-ae3-r.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431g-ae3-r-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "491cc18e9dc733b7a7f409a923ff042b0d697af5698b95fb0ff0668316a31fec",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC Unisonic Tech",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "cbc7e42ea3607271fd053bdd0b3f927bb57df86341dca73ec323955dd5d67419",
      "rows": [
        {
          "name": "Deviation of reference input voltage over temperature",
          "symbol": "∆VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 4.5,
          "max": 17,
          "conditions": "VKA=VREF, IKA=10mA, 0°C ≤ TA ≤ 70°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ratio of change in reference input voltage to change in cathode voltage",
          "symbol": "∆VREF/∆VKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2.7,
          "conditions": "VKA=10V~VREF",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ratio of change in reference input voltage to change in cathode voltage",
          "symbol": "∆VREF/∆VKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -0.5,
          "max": -2,
          "conditions": "VKA=36V~10V, IKA=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference input current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 1.5,
          "max": 4,
          "conditions": "IKA=10mA, R1=10kΩ, R2=∞",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Deviation of reference input current over full temperature range",
          "symbol": "∆IREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "IKA=10mA, R1=10kΩ, R2=∞, TA=full temperature",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "IKA(MIN)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 0.5,
          "conditions": "VKA=VREF",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Off-state cathode current",
          "symbol": "IKA(OFF)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.05,
          "max": 1,
          "conditions": "VKA=36V, VREF=0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dynamic impedance",
          "symbol": "ZKA",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.15,
          "max": 0.5,
          "conditions": "VKA=VREF, IKA=1~100mA, f≤1.0kHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (recommended)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode current (recommended)",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (absolute maximum)",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode current range (continuous)",
          "symbol": "IKA",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference input current range",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "SOT-23/SOT-23-3 package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "TOPR",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tl431g-ae3-r"
  ],
  "discovery_pitch": "TL431G-AE3-R (UTC Unisonic Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl431g-ae3-r.kicad_sym",
    "tl431g-ae3-r.kicad_mod",
    "tl431g-ae3-r.glb",
    "tl431g-ae3-r.step",
    "tl431g-ae3-r.lbr",
    "docs/hero.png",
    "docs/tl431g-ae3-r-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tl431g-ae3-r-hero.glb",
    "tl431g-ae3-r-hero.overlay.json",
    "tl431g-ae3-r-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}