CBM431Z23

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  "slug": "cbm431z23",
  "title": "CBM431Z23",
  "brief": "Corebai Microelectronics Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "CBM431Z23",
    "manufacturer": "Corebai Microelectronics",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
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    "distributor_links": {
      "lcsc": "C5364343"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
        "pn": null,
        "status": "no match"
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    },
    "pins": [
      {
        "number": "1",
        "name": "REFERENCE",
        "type": "input",
        "description": "Reference voltage input pin; the internal reference is about 2.5 V (VREF 2.440 V to 2.550 V for the 2% CBM431Z), and the output is set by external resistors between cathode, reference and anode."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "output",
        "description": "Anode pin, classified as output in the datasheet table; the cathode-to-anode voltage is specified over 0.01 V to 40 V."
      },
      {
        "number": "3",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Cathode pin, classified as input/output in the datasheet; it sinks current from 0.1 mA to 100 mA and the cathode-to-anode voltage is rated up to 40 V."
      }
    ],
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        "zmin_mm": 0,
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        "checked": "2026-10-19",
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  "metadata": {
    "specs": {
      "Manufacturer": "Corebai Microelectronics",
      "Package": "SOT-23-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
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          "name": "阴极-阳极电压 (Cathode-anode voltage)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": 0.01,
          "max": 40,
          "conditions": "",
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        },
        {
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          "max": 100,
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        },
        {
          "name": "基准输入电压 (Reference input voltage, CBM431Z 2%)",
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          "kind": "electrical",
          "unit": "V",
          "min": 2.44,
          "typ": 2.495,
          "max": 2.55,
          "conditions": "VKA = VREF, IK = 10mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "过满载温度范围基准输入电压偏差 (Reference voltage deviation over temperature range)",
          "symbol": "VREF(dev)",
          "kind": "electrical",
          "unit": "MV",
          "min": null,
          "typ": 3,
          "max": 17,
          "conditions": "Tmin ≤ Ta ≤ Tmax",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "基准输入电压变化与阴极电压变化比 (Reference voltage change with cathode voltage, ΔVKA = 10V-VREF)",
          "symbol": "∆VREF/∆VKA",
          "kind": "electrical",
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          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "基准输入电压变化与阴极电压变化比 (Reference voltage change with cathode voltage, ΔVKA = 36V-10V)",
          "symbol": "∆VREF/∆VKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "∆VKA = 36V- 10V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "基准输入电流 (Reference input current)",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1.8,
          "max": 4,
          "conditions": "R1 = 10KΩ, R2 = ∞",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "过满载温度范围基准输入电流偏差 (Reference input current deviation over temperature range)",
          "symbol": "IREF(dev)",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "R1 = 10KΩ, R2 = ∞",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "调节器最小阴极电流 (Minimum cathode current for regulation)",
          "symbol": "IK(min)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "关闭状态阴极电流 (Off-state cathode current)",
          "symbol": "IK(off)",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.17,
          "max": 0.9,
          "conditions": "VKA = 40 V, VREF = 0",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "动态阻抗 (Dynamic impedance)",
          "symbol": "ZKA",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.27,
          "max": 0.5,
          "conditions": "IK = 10mA 至 100 mA, f ≤ 1.0KHz",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "CBM431Z23 (Corebai Microelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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