UC3844BVD1R2G

{
  "slug": "uc3844bvd1r2g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3844bvd1r2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc3844bvd1r2g.kicad_sym",
    "uc3844bvd1r2g.kicad_mod",
    "uc3844bvd1r2g.glb",
    "uc3844bvd1r2g.step",
    "uc3844bvd1r2g.lbr",
    "docs/hero.png",
    "docs/uc3844bvd1r2g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3844bvd1r2g-hero.glb",
    "uc3844bvd1r2g-hero.overlay.json",
    "uc3844bvd1r2g-etched.glb"
  ],
  "component": {
    "mpn": "UC3844BVD1R2G",
    "manufacturer": "onsemi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590911154829283328",
    "parts": {
      "symbol": "uc3844bvd1r2g.kicad_sym",
      "footprint": "uc3844bvd1r2g.kicad_mod",
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      "model_3d_plain": "uc3844bvd1r2g-etched.glb",
      "model_3d_step": "uc3844bvd1r2g-etched.step",
      "model_3d_step_plain": "uc3844bvd1r2g.step",
      "lbr": "uc3844bvd1r2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C889960"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T21:15:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Compensation",
        "type": "output",
        "description": "This pin is the error amplifier output, made available for loop compensation, and the output voltage is offset by two diode drops (about 1.4 V) and divided by three before it reaches the current sense comparator."
      },
      {
        "number": "2",
        "name": "Voltage Feedback",
        "type": "input",
        "description": "This is the inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider, with a maximum input bias current of -2.0 µA."
      },
      {
        "number": "3",
        "name": "Current Sense",
        "type": "input",
        "description": "A voltage proportional to inductor current is connected to this input, which the PWM uses to terminate output switch conduction; the input range is -0.3 V to +5.5 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Resistor RT connects to Vref and capacitor CT to ground to program the oscillator frequency and maximum output duty cycle, with oscillator operation to 1.0 kHz possible."
      },
      {
        "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 1.0 A, and switches at one-half the oscillator frequency."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "This pin is the positive supply of the control IC, with VCC rated up to 36 V in the maximum ratings."
      },
      {
        "number": "8",
        "name": "Vref",
        "type": "power_out",
        "description": "This is the reference output, nominally 5.0 V, that provides charging current for capacitor CT through resistor RT."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The MPN UC3844BVD1R2G is the SOIC-8 (D1 suffix, Case 751) tape-and-reel variant per the ordering tab; The pin function table on page 6 is laid out in a way that makes the 8-pin mapping hard to read. The; The datasheet gives no pin type for RT/CT, Compensation, or Vref. The types above (passive, output, "
        ],
        "pages_sent": 13,
        "cost_usd": 0.1019,
        "at": "2026-10-17T21:13:23"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590911154829283328",
        "pages": 22,
        "sha256": "37535ea3c79885e8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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        "origin": "footprint origin = pad-pattern centre",
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        "extents_mm": [
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        "zmin_mm": -0.0,
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        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-17",
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      {
        "file": "uc3844bvd1r2g-etched.step",
        "role": "eda",
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        "units": "mm",
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        "seat": "z = 0",
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        "sha256": "3bf1b986b12d955e4042c7e092c1f2d15c16d77df8b976e3f6540e30c5f3ca9c",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}