UC3842M

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  "schema_version": 1,
  "type": "component",
  "slug": "uc3842m",
  "title": "UC3842M",
  "brief": "HGSEMI AC-DC Controllers And Regulators, SOP-8. 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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    "power management (pmic)",
    "uc3842m",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "UC3842M",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
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      "lbr": "uc3842m.lbr"
    },
    "distributor_links": {
      "lcsc": "C434474"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T19:18:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
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      "mouser": {
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    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Output of the error amplifier, which can be used for loop compensation."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Inverting input of the error amplifier, normally connected to the switching supply through a resistor divider; the internal reference on the non-inverting side is 2.5 V (Vfb 2.42 V to 2.58 V)."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Voltage proportional to the inductor coil current is applied here, and the PWM turns the output off when the voltage on this pin reaches the threshold; maximum input signal is 0.9 V to 1.1 V and absolute input range is -0.3 V to 5.5 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "RT is connected to VREF and CT to ground to set the oscillator frequency and maximum duty cycle, with frequency up to 500 kHz."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the controller."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Drives the gate of the power MOSFET directly, sourcing or sinking peak currents up to 1 A."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply for the control IC; the absolute maximum supply voltage is 30 V, with undervoltage lockout start at 16 V (typ.) and minimum operating voltage 10 V (typ.)."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "Reference voltage output (5.0 V typ., 4.90 V to 5.10 V at Tj = 25 °C, 1 mA load) that charges timing capacitor CT through resistor RT."
      }
    ],
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      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
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          "name": "振荡频率",
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          "name": "振荡电压特性",
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          "name": "开环电压增益",
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          "name": "单位增益带宽",
          "symbol": "BW",
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          "unit": "MHz",
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          "name": "电源纹波抑制比",
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          "name": "输出灌电流",
          "symbol": "Isink",
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          "name": "输出吸电流",
          "symbol": "Isource",
          "kind": "electrical",
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          "name": "误差放大器输出高电平",
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          "name": "最大输入信号",
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          "name": "传输延迟 电流传感输入到输出",
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          "name": "工作电源电流",
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