VPC28C40

{
  "slug": "vpc28c40",
  "version": "0.1.0",
  "type": "component",
  "description": "VPSC DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "vpc28c40",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "vpc28c40.kicad_sym",
    "vpc28c40.kicad_mod",
    "vpc28c40.glb",
    "vpc28c40.step",
    "vpc28c40.lbr",
    "docs/hero.png",
    "docs/vpc28c40-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "vpc28c40-hero.glb",
    "vpc28c40-hero.overlay.json",
    "vpc28c40-etched.glb"
  ],
  "component": {
    "mpn": "VPC28C40",
    "manufacturer": "VPSC",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/840c5fd7abfdeaae9912ecd180866cc5.pdf",
    "parts": {
      "symbol": "vpc28c40.kicad_sym",
      "footprint": "vpc28c40.kicad_mod",
      "model_3d": "vpc28c40-hero.glb",
      "model_3d_plain": "vpc28c40-etched.glb",
      "model_3d_step": "vpc28c40-etched.step",
      "model_3d_step_plain": "vpc28c40.step",
      "lbr": "vpc28c40.lbr"
    },
    "distributor_links": {
      "lcsc": "C7470595"
    },
    "distributor_check": {
      "checked_at": "2026-11-04T23:40:15Z",
      "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": "Error-amplifier compensation pin that can source and sink current, with a 15 mA maximum error-amplifier sink current, and forcing COMP to ground controls zero duty cycle because the amplifier is internally current-limited."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the internal error amplifier, referenced to 2.5 V (2.475 V to 2.525 V at 25 °C), used to close the voltage feedback loop for stability and kept as short as possible."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Primary-side current-sense input to the PWM comparator, where the recommended CS voltage is up to 1 V and the comparator threshold is 0.9 V to 1.1 V, and an RC filter may be needed to suppress leading-edge spikes."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin where RT connects from VREF and CT connects to GND, setting fOSC ≈ 1.6/(RT×CT) with RT never below 5 kΩ and operation up to 1 MHz."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Analog and signal ground that also serves as power ground because this SOP-8 package has no separate PGND pin."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "Push-pull gate-driver output that sources and sinks up to 1 A peak to drive an external MOSFET directly, held low while VDD is below the turn-on threshold, with an absolute maximum of 30 V to GND."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Controller bias supply that should stay below the 28 V recommended maximum, with a 30 V absolute maximum and an internal clamp of about 30 V to 34 V at 25 mA, and needs a 0.1 µF bypass capacitor placed close to the pin."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "5 V reference output (4.90 V to 5.10 V at 1 mA) that requires a minimum 0.1 µF ceramic bypass capacitor close to the pin and is rated for a recommended output current of -20 mA."
      }
    ],
    "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 datasheet covers all 12 part numbers in the VPCx8C4x family and the ordering table lists only SO; Pin types are not stated in the datasheet and were inferred from the function descriptions (for exam; The oscillator formula in the text is garbled in extraction (printed as 1.6RT × CT). It was read as "
        ],
        "pages_sent": 15,
        "cost_usd": 0.08,
        "at": "2026-11-04T23:40:02"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/840c5fd7abfdeaae9912ecd180866cc5.pdf",
        "pages": 15,
        "sha256": "41de8f28b106ea3c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "vpc28c40.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-11-04",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "vpc28c40-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "19333696f17055be774c2e75ac6e9e59c8af0b654c9180cd43b1e7318b930b1a",
        "checked": "2026-11-04",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}