MT7938

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  "schema_version": 1,
  "type": "component",
  "slug": "mt7938",
  "title": "MT7938",
  "brief": "MAXIC Tech LED Drivers, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "nixie tube driver-led driver",
    "mt7938",
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  "component": {
    "mpn": "MT7938",
    "manufacturer": "MAXIC Tech",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Nixie Tube Driver/LED Driver",
    "subcategory": "LED Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9ebcfe2bb99c1e20ac91c9bd49da67a7.pdf",
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    "distributor_links": {
      "lcsc": "C2979269"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
        "pn": null,
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    "pins": [
      {
        "number": "1",
        "name": "TADJ",
        "type": "input",
        "description": "Over-temperature regulation setting pin; the temperature regulation threshold is set by the ratio of the external resistor R7 to the DSEN resistance (R7/(RDSEN+9kΩ)), giving 88°C to 148°C (148°C when floating)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Chip ground."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Current sense pin; cycle-by-cycle over-current protection trips when CS exceeds 1.8V, with 240ns internal leading-edge blanking and an absolute maximum of 5V."
      },
      {
        "number": "4",
        "name": "DRV",
        "type": "output",
        "description": "Gate drive output for the external power MOSFET, with 0.2A sink and 0.2A source capability at DRV=4V and an absolute maximum of 24V."
      },
      {
        "number": "5",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip power supply, operating range 6.8V to 20V (start-up at 20V, UVLO 6.8V falling, clamp 20V, OVP threshold 27V)."
      },
      {
        "number": "6",
        "name": "DSEN",
        "type": "input",
        "description": "Auxiliary winding feedback voltage sensed via a resistor divider to reflect output voltage; output OVP trips above 3.6V and the absolute maximum is 5V."
      }
    ],
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        "described": 6,
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  "metadata": {
    "specs": {
      "Manufacturer": "MAXIC Tech",
      "Package": "SOT-23-6",
      "Category": "Nixie Tube Driver/LED Driver",
      "Pins": "6"
    },
    "characteristics": {
      "version": 1,
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      "rows": [
        {
          "name": "Primary current sense reference voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "mV",
          "min": 392,
          "typ": 400,
          "max": 408,
          "conditions": "VDD=15V, TA=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VDD pin voltage",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "to VDD clamp voltage",
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        {
          "name": "Power dissipation",
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        },
        {
          "name": "Soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
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        {
          "name": "Storage temperature",
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        {
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          "max": 20,
          "conditions": "",
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        {
          "name": "Operating ambient temperature",
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          "conditions": "",
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        {
          "name": "Thermal resistance junction to ambient",
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          "kind": "thermal",
          "unit": "°C/W",
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          "max": null,
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        {
          "name": "Thermal resistance junction to case",
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          "kind": "thermal",
          "unit": "°C/W",
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          "max": null,
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          "source_page": 2,
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        },
        {
          "name": "Startup current",
          "symbol": "ISTART",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Undervoltage lockout threshold",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 6.8,
          "max": null,
          "conditions": "VDD pin voltage falling",
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        },
        {
          "name": "Startup voltage",
          "symbol": "VSTART",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "VDD pin voltage rising",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "VDD clamp current",
          "symbol": "IVDD_CLAMP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "VDD>20V",
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        {
          "name": "VDD clamp voltage",
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        {
          "name": "VDD pin OVP threshold",
          "symbol": "VOVP1",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 27,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "DSEN pin OVP threshold",
          "symbol": "VOVP2",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 3.6,
          "max": null,
          "conditions": "",
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          "name": "Off-state leading edge blanking time",
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          "kind": "timing",
          "unit": "μs",
          "min": null,
          "typ": 2.1,
          "max": null,
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          "unit": "μs",
          "min": null,
          "typ": 25,
          "max": null,
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        {
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          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Minimum switching period",
          "symbol": "TMIN",
          "kind": "timing",
          "unit": "μs",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "",
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        {
          "name": "CS pin leading edge blanking time",
          "symbol": "TCS_LEB",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 240,
          "max": null,
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        {
          "name": "CS pin overcurrent protection threshold",
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          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.8,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum over-temperature regulation threshold",
          "symbol": "TOTR_MAX",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 148,
          "max": null,
          "conditions": "TADJ pin floating",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum over-temperature regulation threshold",
          "symbol": "TOTR_MIN",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 88,
          "max": null,
          "conditions": "TADJ pin resistor adjusted",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Maximum driver sink current",
          "symbol": "ISINK",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "DRV=4V",
          "source_page": 4,
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        {
          "name": "Maximum driver source current",
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          "typ": 0.2,
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          "conditions": "DRV=4V",
          "source_page": 4,
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