LTL431ATSLT1G

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  "slug": "ltl431atslt1g",
  "title": "LTL431ATSLT1G",
  "brief": "LRC Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "LTL431ATSLT1G",
    "manufacturer": "LRC",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Reference",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2111041830_LRC-LTL431ATSLT1G_C2912066.pdf",
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    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode (K) terminal of the shunt regulator. Sinks current (typ 1-100 mA, absolute max -100 to +150 mA) to regulate the cathode-to-anode voltage. Cathode voltage may be set from Vref (~2.5V) up to 36V. Dynamic impedance ~0.2 Ω."
      },
      {
        "number": "2",
        "name": "REF",
        "type": "input",
        "description": "Reference (R) input pin. Internally compared against the 2.5V bandgap reference; the device regulates so that this pin sits at Vref (typ 2.495-2.50 V). Typical reference input current ~1 µA (max 2 µA). Connect to the R1/R2 divider from cathode to set output voltage: VKA = Vref x (1 + R1/R2) + Iref x R1."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode (A) terminal, typically tied to circuit ground / return. Return path for the cathode sink current and the internal reference amplifier."
      }
    ],
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    "pin1": {
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      "at": [
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        -0.95
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  "metadata": {
    "specs": {
      "Manufacturer": "LRC",
      "Package": "SOT-23",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Reference Input Voltage (1% grade, Reference Input Voltage 2 table)",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 2.47,
          "typ": 2.495,
          "max": 2.52,
          "conditions": "VKA=VREF, IKA=10mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Deviation of reference input voltage over temperature",
          "symbol": "ΔVref",
          "kind": "temperature_coefficient",
          "unit": "mV",
          "min": null,
          "typ": 4.5,
          "max": 25,
          "conditions": "VKA=VREF, IKA=10mA, TMIN≤TA≤TMAX",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Ratio of change in reference input voltage to change in cathode voltage (ΔVKA=10V~VREF)",
          "symbol": "ΔVref/ΔVKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2.7,
          "conditions": "IKA=10mA, ΔVKA=10V~VREF",
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        {
          "name": "Ratio of change in reference input voltage to change in cathode voltage (ΔVKA=36V~10V)",
          "symbol": "ΔVref/ΔVKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -0.5,
          "max": -2,
          "conditions": "IKA=10mA, ΔVKA=36V~10V",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Reference input current",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1,
          "max": 2,
          "conditions": "IKA=10mA, R1=10kΩ, R2=∞",
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        },
        {
          "name": "Deviation of reference input current over full temperature range",
          "symbol": "ΔIref/ΔT",
          "kind": "temperature_coefficient",
          "unit": "μA",
          "min": null,
          "typ": 0.2,
          "max": 0.4,
          "conditions": "IKA=10mA, R1=10kΩ, R2=∞, TA=full temperature range",
          "source_page": 2,
          "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": 2,
          "source": "datasheet"
        },
        {
          "name": "Off-state cathode current",
          "symbol": "IKA(OFF)",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.05,
          "max": 0.5,
          "conditions": "VKA=36V, VREF=0",
          "source_page": 2,
          "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": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature range",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Classification table temperature range for all listed grades",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
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      "mpn": "LTL431ATSLT1G",
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    {
      "mpn": "LTL431BTSLT1G",
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    {
      "mpn": "LTL431APTSLT1G",
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      "mpn": "LTL431BPTSLT1G",
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  "updated_at": "2026-09-28T18:16:39.839Z"
}