main
Ray Set visibility: public 35697da 4h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431bw5-7",
  "title": "TL431BW5-7",
  "brief": "Diodes Incorporated Voltage Reference, SOT-25. 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)",
    "tl431bw5-7",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TL431BW5-7",
    "manufacturer": "Diodes Incorporated",
    "package": "SOT-25",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560092749220372480",
    "parts": {
      "symbol": "tl431bw5-7.kicad_sym",
      "footprint": "tl431bw5-7.kicad_mod",
      "model_3d": "tl431bw5-7-hero.glb",
      "model_3d_plain": "tl431bw5-7-etched.glb",
      "model_3d_step": "tl431bw5-7-etched.step",
      "model_3d_step_plain": "tl431bw5-7.step",
      "lbr": "tl431bw5-7.lbr"
    },
    "distributor_links": {
      "lcsc": "C445501"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T14:43:52Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, labelled NC on the SOT25 pin assignment drawing."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "Not labelled by function; the datasheet says to leave it floating or connect it to pin 5 (ANODE)."
      },
      {
        "number": "3",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode of the shunt regulator, rated 40V maximum (VKA) and 150mA continuous (IKA), with 1mA to 100mA recommended operating sink current."
      },
      {
        "number": "4",
        "name": "REF",
        "type": "input",
        "description": "Reference input that sets the output voltage via an external divider (VREF 2.495V typ), with input current rated -0.050 to +10mA."
      },
      {
        "number": "5",
        "name": "ANODE",
        "type": "power_in",
        "description": "Anode of the shunt regulator, the ground reference for all specified voltages."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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: On the SOT25 drawing pin 1's number is not printed. The unlabelled box at the top-left is NC, so I a; The part marking page lists TL431BW5 in SOT25, which matches the MPN TL431BW5-7. The ordering table ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 14,
        "cost_usd": 0.2054,
        "at": "2026-10-18T14:41:47"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560092749220372480",
        "pages": 14,
        "sha256": "8ce0c11446beda6f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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        "file": "tl431bw5-7.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          2.9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "951fa09ac4d4e4bdf16ceb0201e828104be99ed92bac85206e1e86d5189f82e1",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Diodes Incorporated",
      "Package": "SOT-25",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8ce0c11446beda6f850efaa57317c331b0b1a2334607be2e58874c30ce657960",
      "rows": [
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          "name": "Reference voltage (TL431B, ±0.5%)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.482,
          "typ": 2.495,
          "max": 2.507,
          "conditions": "VKA = VREF, IKA = 10mA, TA = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Deviation of reference voltage over temperature, 0 to 70°C",
          "symbol": "VDEV",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 6,
          "max": 16,
          "conditions": "VKA = VREF, IKA = 10mA, TA = 0 to 70°C",
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        },
        {
          "name": "Deviation of reference voltage over temperature, -40 to +85°C",
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          "min": null,
          "typ": 14,
          "max": 34,
          "conditions": "VKA = VREF, IKA = 10mA, TA = -40 to +85°C",
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          "source": "datasheet"
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        {
          "name": "Deviation of reference voltage over temperature, -40 to +125°C",
          "symbol": "VDEV",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 14,
          "max": 34,
          "conditions": "VKA = VREF, IKA = 10mA, TA = -40 to +125°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ratio of change in reference voltage to change in cathode voltage (10V to VREF)",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IKA = 10mA, VKA = 10V to VREF",
          "source_page": 3,
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        },
        {
          "name": "Ratio of change in reference voltage to change in cathode voltage (36V to 10V)",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IKA = 10mA, VKA = 36V to 10V",
          "source_page": 3,
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        },
        {
          "name": "Reference input current",
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          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 1,
          "max": 4,
          "conditions": "IKA = 10mA, R1 = 10KΩ, R2 = ∞",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "IREF deviation over temperature, 0 to 70°C",
          "symbol": "ΔIREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.8,
          "max": 1.2,
          "conditions": "IKA = 10mA, R1 = 10KΩ, R2 = ∞, TA = 0 to 70°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "IREF deviation over temperature, -40 to +85°C",
          "symbol": "ΔIREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "max": 2.5,
          "conditions": "IKA = 10mA, R1 = 10KΩ, R2 = ∞, TA = -40 to +85°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "IREF deviation over temperature, -40 to +125°C",
          "symbol": "ΔIREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "IKA(MIN)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 0.7,
          "conditions": "VKA = VREF",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Off-state current",
          "symbol": "IKA(OFF)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.05,
          "max": 0.5,
          "conditions": "VKA = 36V, VREF = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dynamic output impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.2,
          "max": 0.5,
          "conditions": "VKA = VREF, f = 0Hz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage tolerance at 25°C, grade B (±0.5%)",
          "symbol": "VREF",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "TL431B grade, TA = 25°C, per Features and Ordering",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient, SOT25",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "SOT25 package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Minimum printed as VREF (not numeric)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode current",
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          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "TA",
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          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Cathode voltage",
          "symbol": "VKA",
          "kind": "absolute_maximum",
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          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Voltages relative to ANODE pin",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current",
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          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference input current",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TST",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "SOT25; ambient 25°C (Notes 5, 6)",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "TL431BW5-7 (Diodes Incorporated) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}