AZ431AZ-ATRE1

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  "type": "component",
  "slug": "az431az-atre1",
  "title": "AZ431AZ-ATRE1",
  "brief": "Diodes Incorporated Voltage Reference, TO-92-2.54mm. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "AZ431AZ-ATRE1",
    "manufacturer": "Diodes Incorporated",
    "package": "TO-92-2.54mm",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.diodes.com/assets/Datasheets/AZ431AZ-ATRE1.pdf",
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    "pins": [
      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input to the internal error amplifier. Regulation forces this pin to the internal 2.5 V VREF (0.4% tol) versus ANODE, typically driven from an external resistor divider between CATHODE and ANODE to program the output. Max continuous input current 10 mA; typical IREF ~0.7 uA."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "passive",
        "description": "Shunt cathode (K). Sinks the regulation current to hold VKA at the programmed voltage set by the REF divider. Absolute max VKA = 40 V, recommended 2.5 V to 36 V; cathode current range -100 mA to +150 mA (recommended 1 mA to 100 mA for regulation). Dynamic impedance ~0.15 Ω typical."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Shunt anode (A), the common reference return for both the cathode current and the REF input divider. Typically tied to circuit ground in a shunt-regulator configuration."
      }
    ],
    "provenance": {
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        "pages": 19,
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        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    "pin1": {
      "pad": "1",
      "at": [
        0,
        0
      ],
      "corner": "bottom-right",
      "source": "pad-position",
      "derived_from": "TO-92_Inline@sha256:19731cf8b8c297aa",
      "mark": "synthesised"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "8ef298a91b81b96f1481c87a86d713baed29e4351c2160969c9f2f36c410d7a6",
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      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Diodes Incorporated",
      "Package": "TO-92-2.54mm",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Cathode Voltage",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current Range (Continuous)",
          "symbol": "IKA",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Range",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 770,
          "conditions": "Z, R Package",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "ESD (Human Body Model)",
          "symbol": "ESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "Human Body Model",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode Voltage (recommended)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Min = VREF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current (recommended)",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.49,
          "typ": 2.5,
          "max": 2.51,
          "conditions": "0.4% variant; VKA = VREF, IKA = 10mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Voltage Over Full Temperature Range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 4.5,
          "max": 8,
          "conditions": "VKA = VREF, IKA = 10mA, 0 to +70°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Voltage Over Full Temperature Range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 4.5,
          "max": 10,
          "conditions": "VKA = VREF, IKA = 10mA, -40 to +85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Voltage Over Full Temperature Range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 4.5,
          "max": 16,
          "conditions": "VKA = VREF, IKA = 10mA, -40 to +125°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Voltage to Change in Cathode Voltage",
          "symbol": "VREF/VKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2.7,
          "conditions": "IKA = 10mA, VKA = 10V to VREF",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Voltage to Change in Cathode Voltage",
          "symbol": "VREF/VKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -0.5,
          "max": -2,
          "conditions": "IKA = 10mA, VKA = 36V to 10V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference Current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.7,
          "max": 4,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = ∞",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference 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 = -40 to +125°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Minimum Cathode Current for Regulation",
          "symbol": "IKA(Min)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 1,
          "conditions": "VKA = VREF",
          "source_page": 5,
          "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": 5,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "ZKA",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.15,
          "max": 0.5,
          "conditions": "VKA = VREF, IKA = 1 to 100mA, f ≤ 1.0kHz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance (Junction to Ambient)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 165,
          "max": null,
          "conditions": "TO92; junction to ambient (absolute maximum table)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance (Junction to Case)",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 81.63,
          "max": null,
          "conditions": "TO92",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Full-range Temperature Coefficient",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "Typical, per Features list",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
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  "updated_at": "2026-09-24T17:24:34.070Z"
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