UC2842B

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  "schema_version": 1,
  "type": "component",
  "slug": "uc2842b",
  "title": "UC2842B",
  "brief": "UMW DC-DC Converters, 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)",
    "uc2842b",
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  "component": {
    "mpn": "UC2842B",
    "manufacturer": "UMW",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757269799469113344",
    "parts": {
      "symbol": "uc2842b.kicad_sym",
      "footprint": "uc2842b.kicad_mod",
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      "model_3d_step": "uc2842b-etched.step",
      "model_3d_step_plain": "uc2842b.step",
      "lbr": "uc2842b.lbr"
    },
    "distributor_links": {
      "lcsc": "C2995534"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T08:36:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "This pin is the error amplifier output and is made for loop compensation."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "This is the inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider; the analog input absolute maximum range is -0.3 V to 5.5 V."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "A voltage proportional to inductor current is connected to this input, which the PWM uses to terminate output switch conduction; the analog input absolute maximum range is -0.3 V to 5.5 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to Vref and capacitor CT to ground."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "This pin is the combined control circuitry and power ground."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "This output directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1 A."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "This pin is the positive supply of the integrated circuit; the absolute maximum supply voltage is 30 V (low impedance source)."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "This is the reference output, which provides charging current for capacitor CT through resistor RT."
      }
    ],
    "provenance": {
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        "primary_model": "claude-haiku-5-5",
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        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin descriptions are one sentence each; the datasheet's pin-description table lists pins in a differ; The datasheet does not state a pin type for RT/CT; 'passive' was chosen because it is a timing netwo"
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        "pages_sent": 13,
        "cost_usd": 0.0436,
        "at": "2026-10-09T08:34:13"
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        "pages": 13,
        "sha256": "d748ab15bdd235a3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "seat": "z = 0",
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        "checked": "2026-10-09",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "d748ab15bdd235a3",
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          "name": "Supply Voltage (low impedance source)",
          "symbol": "VCC",
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          "typ": null,
          "max": 30,
          "conditions": "low impedance source",
          "source_page": 3,
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        },
        {
          "name": "Output Current",
          "symbol": "IO",
          "kind": "absolute_maximum",
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          "min": -1,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Input Voltage (Analog Inputs pins 2,3)",
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        },
        {
          "name": "Error Amp Output Sink Current",
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          "unit": "mA",
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        {
          "name": "Power Dissipation (TA=25°C)",
          "symbol": "PD",
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          "unit": "W",
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        },
        {
          "name": "Storage Temperature Range",
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          "name": "Lead Temperature (soldering 5 sec.)",
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          "typ": null,
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          "conditions": "",
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        {
          "name": "Reference Output Voltage",
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          "unit": "V",
          "min": 4.95,
          "typ": 5,
          "max": 5.05,
          "conditions": "TJ=25°C, IREF=1mA",
          "source_page": 4,
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        },
        {
          "name": "Undervoltage Lockout Start Threshold (2842)",
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          "typ": 16,
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          "conditions": "",
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        },
        {
          "name": "Min. Operating Voltage (After Turn On) (2842)",
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          "typ": 10,
          "max": 11,
          "conditions": "",
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        },
        {
          "name": "Max. Duty Cycle (2842/43)",
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          "kind": "electrical",
          "unit": "%",
          "min": 95,
          "typ": 97,
          "max": 100,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
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  "discovery_pitch": "UC2842B (UMW) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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