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Ray tl431bqdbzrq1: specified limits as data (metadata.characteristics, 23 rows from the datasheet) 8b36d8e 26d ago
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  "slug": "tl431bqdbzrq1",
  "title": "TL431BQDBZRQ1",
  "brief": "Texas Instruments Voltage Reference, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "manufacturer": "Texas Instruments",
    "package": "SOT-23-3",
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    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tl431-q1",
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        "description": "Shunt current or voltage input. Cathode of the internal shunt regulator; conducts current when REF exceeds VREF (2.495 V typ). Recommended operating range VREF to 36 V, cathode current 1-100 mA; dynamic impedance 0.2 Ω typ."
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        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "checked": "2026-10-07",
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-23-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6e78e952a7d3e8bc",
      "rows": [
        {
          "name": "Reference voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": 2483,
          "typ": 2495,
          "max": 2507,
          "conditions": "VKA = VREF, IKA = 10 mA, see Figure 20",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Deviation of reference voltage over full temperature",
          "symbol": "VI(DEV)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 14,
          "max": 34,
          "conditions": "VKA = VREF, IKA = 10 mA, TA = –40°C to 125°C, see Figure 20",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Ratio of change in reference voltage to change in cathode voltage",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IKA = 10 mA, see Figure 21; ΔVKA = 10 V – VREF",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Ratio of change in reference voltage to change in cathode voltage",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IKA = 10 mA, see Figure 21; ΔVKA = 36 V – 10 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 4,
          "conditions": "IKA = 10 mA, R1 = 10 kΩ, R2 = ∞, see Figure 21",
          "source_page": 5,
          "source": "datasheet"
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          "name": "Deviation of reference current over full temperature",
          "symbol": "II(DEV)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.8,
          "max": 2.5,
          "conditions": "IKA = 10 mA, R1 = 10 kΩ, R2 = ∞, TA = –40°C to 125°C, see Figure 21",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "IMIN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 0.7,
          "conditions": "VKA = VREF, see Figure 20",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "OFF-state cathode current",
          "symbol": "IOFF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.1,
          "max": 0.5,
          "conditions": "VKA = 36 V, VREF = 0, see Figure 22",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Dynamic impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.2,
          "max": 0.5,
          "conditions": "IKA = 1 mA to 100 mA, VKA = VREF, f ≤ 1 kHz, see Figure 20",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (recommended operating)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Minimum printed as VREF (symbol, not a number)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode current",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "Voltage with respect to ANODE",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference input current, Low",
          "symbol": "",
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          "unit": "µA",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "Low",
          "source_page": 4,
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        },
        {
          "name": "Reference input current, High",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "High",
          "source_page": 4,
          "source": "datasheet"
        },
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          "name": "Operating junction temperature",
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          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
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        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance (DBZ, 3-pin)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 334.7,
          "max": null,
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          "min": null,
          "typ": 67.6,
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          "name": "Junction-to-top characterization parameter (DBZ, 3-pin)",
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          "min": null,
          "typ": 6.7,
          "max": null,
          "conditions": "DBZ (SOT-23) 3 pins",
          "source_page": 4,
          "source": "datasheet"
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          "name": "Junction-to-board characterization parameter (DBZ, 3-pin)",
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          "unit": "°C/W",
          "min": null,
          "typ": 65.9,
          "max": null,
          "conditions": "DBZ (SOT-23) 3 pins",
          "source_page": 4,
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  "updated_at": "2026-09-25T09:56:53.295Z"
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