TL431AILPG

{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431ailpg",
  "title": "TL431AILPG",
  "brief": "onsemi Voltage Reference, TO-92. 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)",
    "tl431ailpg",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "TL431AILPG",
    "manufacturer": "onsemi",
    "package": "TO-92",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588890167533326336",
    "parts": {
      "symbol": "tl431ailpg.kicad_sym",
      "footprint": "tl431ailpg.kicad_mod",
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      "model_3d_plain": "tl431ailpg.glb",
      "model_3d_step": "tl431ailpg-etched.step",
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      "lbr": "tl431ailpg.lbr"
    },
    "distributor_links": {
      "lcsc": "C233731",
      "mouser": "863-TL431AILPG"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T23:11:25Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 539 calls left today"
      },
      "mouser": {
        "pn": "863-TL431AILPG",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Reference",
        "type": "input",
        "description": "Reference input (REF) that sets the programmed output voltage through the external resistor divider; the datasheet gives a reference input current range of -0.05 to +10 mA continuous and a Vref of 2.5 V."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Common anode terminal; the cathode-to-anode voltage must stay between Vref and 36 V in recommended operation, with a 37 V absolute maximum."
      },
      {
        "number": "3",
        "name": "Cathode",
        "type": "passive",
        "description": "Cathode terminal of the shunt regulator, which carries 1.0 to 100 mA in recommended operation and 150 mA maximum continuous (-100 to +150 mA range)."
      }
    ],
    "provenance": {
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        "factory": "2.0.0",
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        "primary_model": "claude-haiku-5-5",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin numbers and names come from the TO-92 LP suffix pin key on page 1 (Pin 1 Reference, 2 Anode, 3 C"
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        "cost_usd": 0.0833,
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      "datasheet": {
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
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        "described": 3,
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        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
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        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
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        "checked": "2026-10-09",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "TO-92",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "c82bb95655b732ca",
      "rows": [
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          "name": "Reference Input Voltage, TA = 25°C",
          "symbol": "Vref",
          "kind": "tolerance",
          "unit": "V",
          "min": 2.47,
          "typ": 2.495,
          "max": 2.52,
          "conditions": "VKA = Vref, IK = 10 mA, TA = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage, TA = Tlow to Thigh",
          "symbol": "Vref",
          "kind": "tolerance",
          "unit": "V",
          "min": 2.44,
          "typ": null,
          "max": 2.55,
          "conditions": "VKA = Vref, IK = 10 mA, TA = Tlow to Thigh (Note 6)",
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        },
        {
          "name": "Reference Input Voltage Deviation Over Temperature Range",
          "symbol": "Vref",
          "kind": "tolerance",
          "unit": "mV",
          "min": null,
          "typ": 7,
          "max": 30,
          "conditions": "VKA = Vref, IK = 10 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage (VKA = 10 V to Vref)",
          "symbol": "Vref",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IK = 10 mA (Figure 2), VKA = 10 V to Vref",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Input Voltage to Change in Cathode to Anode Voltage (VKA = 36 V to 10 V)",
          "symbol": "VKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IK = 10 mA (Figure 2), VKA = 36 V to 10 V",
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        },
        {
          "name": "Reference Input Current, TA = 25°C",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1.1,
          "max": 2,
          "conditions": "IK = 10 mA, R1 = 10 k, R2 = ∞, TA = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current, TA = Tlow to Thigh",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "IK = 10 mA, R1 = 10 k, R2 = ∞, TA = Tlow to Thigh (Note 6)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Deviation Over Temperature Range",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.8,
          "max": 2.5,
          "conditions": "IK = 10 mA, R1 = 10 k, R2 = ∞",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum Cathode Current For Regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.5,
          "max": 1,
          "conditions": "VKA = Vref (Figure 1)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Off-State Cathode Current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 20,
          "max": 1000,
          "conditions": "VKA = 36 V, Vref = 0 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.22,
          "max": 0.5,
          "conditions": "VKA = Vref, IK = 1.0 mA to 100 mA, f ≤ 1.0 kHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode to Anode Voltage (maximum rating)",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "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, Continuous",
          "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": "Operating Ambient Temperature Range (TL431AI)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Full operating ambient temperature range, TL431AI grade",
          "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": "ESD Human Body Model",
          "symbol": "HBM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 2000,
          "typ": null,
          "max": null,
          "conditions": "Per JEDEC JESD22-A114F; printed as >2000",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Machine Model",
          "symbol": "MM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 200,
          "typ": null,
          "max": null,
          "conditions": "Per JEDEC JESD22-A115C; printed as >200",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Charged Device Model",
          "symbol": "CDM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 500,
          "typ": null,
          "max": null,
          "conditions": "Per JEDEC JESD22-C101E; printed as >500",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode to Anode Voltage (recommended)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Minimum printed as Vref (symbolic, not numeric)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current (recommended)",
          "symbol": "IK",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Derating above 25°C Ambient Temperature, D/LP Suffix Plastic Package",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "W",
          "min": null,
          "typ": 0.7,
          "max": null,
          "conditions": "Derate above 25°C ambient temperature, D and LP suffix plastic package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Derating above 25°C Case Temperature, D/LP Suffix Plastic Package",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "W",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "Derate above 25°C case temperature, D and LP suffix plastic package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Ambient (LP Suffix, TO-92)",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 178,
          "max": null,
          "conditions": "LP suffix package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Case (LP Suffix, TO-92)",
          "symbol": "RJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 83,
          "max": null,
          "conditions": "LP suffix package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Voltage Tolerance (ordering table, TL431AILPG)",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        }
      ]
    }
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  "author": {
    "name": "Ray",
    "email": "[email protected]"
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