AZ431AN-ATRG1

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  "title": "AZ431AN-ATRG1",
  "brief": "Diodes Incorporated Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "AZ431AN-ATRG1",
    "manufacturer": "Diodes Incorporated",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.diodes.com/assets/Datasheets/AZ431AN-ATRG1.pdf",
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      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input to the internal error amplifier. The device regulates so that V(REF) equals the internal 2.5 V bandgap reference. Reference input current range is +/-10 mA absolute max; typical bias current is in the microamp range. Connect to the tap of the external resistor divider from CATHODE to ANODE that sets the shunt regulation voltage: V_KA = (1 + R1/R2) * V_REF."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode of the shunt regulator (equivalent to a programmable Zener cathode). Sinks the regulated current (I_KA) from the load through an internal pass transistor when V_KA reaches the programmed threshold. Rated V_KA up to 40 V absolute max (36 V recommended), continuous cathode current -100 to +150 mA absolute max (1-100 mA recommended operating)."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode of the shunt regulator; the internal reference and error amplifier ground return. Connect to the negative side of the shunt (typically circuit ground / the low side of the R1/R2 divider)."
      }
    ],
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        "described": 3,
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    "pin1": {
      "pad": "1",
      "at": [
        -0.9375,
        -0.95
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      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23@sha256:0d88c86c1b6d8c1a",
      "mark": "drawn"
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        "zmin_mm": 0.0,
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        "checked": "2026-10-07",
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  "metadata": {
    "specs": {
      "Manufacturer": "Diodes Incorporated",
      "Package": "SOT-23",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
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      "rows": [
        {
          "name": "Reference Voltage (0.4% grade)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.49,
          "typ": 2.5,
          "max": 2.51,
          "conditions": "VKA = VREF, IKA = 10mA",
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        },
        {
          "name": "Deviation of Reference Voltage Over Full Temperature Range",
          "symbol": "VREF",
          "kind": "temperature_coefficient",
          "unit": "mV",
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          "max": 8,
          "conditions": "VKA = VREF, IKA = 10mA, 0 to +70°C",
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          "name": "Deviation of Reference Voltage Over Full Temperature Range",
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          "conditions": "VKA = VREF, IKA = 10mA, -40 to +85°C",
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          "name": "Deviation of Reference Voltage Over Full Temperature Range",
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          "conditions": "VKA = VREF, IKA = 10mA, -40 to +125°C",
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        {
          "name": "Ratio of Change in Reference Voltage to Change in Cathode Voltage",
          "symbol": "",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
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          "conditions": "IKA = 10mA, VKA = 10V to VREF",
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        },
        {
          "name": "Ratio of Change in Reference Voltage to Change in Cathode Voltage",
          "symbol": "",
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          "conditions": "IKA = 10mA, VKA = 36V to 10V",
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        },
        {
          "name": "Reference Current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "µA",
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          "typ": 0.7,
          "max": 4,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = ∞",
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        },
        {
          "name": "Deviation of Reference Current Over Full Temperature Range",
          "symbol": "IREF",
          "kind": "temperature_coefficient",
          "unit": "µA",
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          "max": 1.2,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = ∞, TA = -40 to +125°C",
          "source_page": 5,
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        },
        {
          "name": "Minimum Cathode Current for Regulation",
          "symbol": "IKA(Min)",
          "kind": "electrical",
          "unit": "mA",
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          "typ": 0.4,
          "max": 1,
          "conditions": "VKA = VREF",
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        {
          "name": "Off-state Cathode Current",
          "symbol": "IKA(Off)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.05,
          "max": 1,
          "conditions": "VKA = 36V, VREF = 0",
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        },
        {
          "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",
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        {
          "name": "Cathode Voltage",
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          "max": 40,
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        },
        {
          "name": "Cathode Current Range (Continuous)",
          "symbol": "IKA",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
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        },
        {
          "name": "Reference Input Current Range",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
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        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 370,
          "conditions": "N Package (SOT23)",
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        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "ESD (Human Body Model)",
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        {
          "name": "Cathode Voltage (recommended)",
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          "min": null,
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          "name": "Cathode Current (recommended)",
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        {
          "name": "Operating Ambient Temperature Range",
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          "typ": null,
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          "conditions": "",
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        {
          "name": "Thermal Resistance (Junction to Ambient), SOT23",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 380,
          "max": null,
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        {
          "name": "Thermal Resistance (Junction to Case), SOT23",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 135.48,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
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