UC2842BD1R2G

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  "type": "component",
  "slug": "uc2842bd1r2g",
  "title": "UC2842BD1R2G",
  "brief": "onsemi AC-DC Controllers and Regulators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "UC2842BD1R2G",
    "manufacturer": "onsemi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "AC-DC Controllers and Regulators",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/uc2842bd1r2-d.pdf",
    "parts": {
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      "footprint": "uc2842bd1r2g.kicad_mod",
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    "distributor_links": {
      "lcsc": "C7112"
    },
    "pins": [
      {
        "number": "1",
        "name": "Compensation",
        "type": "output",
        "description": "Error amplifier output; typically connected via compensation network back to pin 2 (Voltage Feedback) to set loop response. Also serves as the input to the PWM comparator internally. Voltage range 0 to 7.2 V max."
      },
      {
        "number": "2",
        "name": "Voltage Feedback",
        "type": "input",
        "description": "Inverting input of the error amplifier. Normally connected through a resistor divider to the converter output for regulation; nominal reference at this pin is 2.5 V. Input voltage range -0.3 to +5.5 V."
      },
      {
        "number": "3",
        "name": "Current Sense",
        "type": "input",
        "description": "Non-inverting input of the current sense comparator; senses the primary switch current via a shunt resistor. Cycle-by-cycle current limiting threshold is nominally 1.0 V. Input voltage range -0.3 to +5.5 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin. Connect a timing resistor (RT) from Vref to this pin and a timing capacitor (CT) from this pin to GND to set the oscillator frequency (guaranteed to 250 kHz, operable to 500 kHz)."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Signal and power ground reference for the device. In the SOIC-8 package this is the single common ground (SOIC-14 splits it into separate signal GND and Power Ground)."
      },
      {
        "number": "6",
        "name": "Output",
        "type": "output",
        "description": "High-current totem-pole PWM gate-drive output for a power MOSFET. Peak output current 1.0 A source or sink; typical rise/fall time 50 ns into 1.0 nF. Output swings between GND and VCC."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input for control logic and the output stage. UCX842B startup UVLO threshold is 16 V (typ) with 10 V (typ) minimum operating voltage after turn-on. Absolute maximum 30 V; internal zener clamps at ~36 V."
      },
      {
        "number": "8",
        "name": "Vref",
        "type": "power_out",
        "description": "Buffered 5.0 V reference output (trimmed, 5.0 V ±1% at 1 mA), used to bias the oscillator timing network and can supply modest external loads. Short-circuit current limited (-30 to -180 mA)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/uc2842bd1r2-d.pdf",
        "pages": 22,
        "sha256": "581ae31fbd1f3e07",
        "source_tier": "mfr"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
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        -1.905
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      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
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        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
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        "extents_mm": [
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        "sha256": "f21c55e57cfc0910752fc3d12fb99f6072d9d1cb2598fbaff4674f293ef3d971",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "UC2842BD1R2G (onsemi) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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  "variants": [
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      "mpn": "UC2842BD1R2G",
      "kind": "packaging"
    },
    {
      "mpn": "UC2842BD1R2GD1G",
      "kind": "packaging"
    },
    {
      "mpn": "UC2842BD1R2GN",
      "kind": "packaging"
    },
    {
      "mpn": "UC2842BD1R2GNG",
      "kind": "packaging"
    },
    {
      "mpn": "UC2842BD1R2GD",
      "kind": "packaging"
    },
    {
      "mpn": "UC2842BD1R2GDG",
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    {
      "mpn": "UC2842BD1R2GDR2G",
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  ],
  "updated_at": "2026-09-25T13:27:16.816Z"
}