VPC28C40

{
  "schema_version": 1,
  "type": "component",
  "slug": "vpc28c40",
  "title": "VPC28C40",
  "brief": "VPSC 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": [
    "component",
    "power management (pmic)",
    "vpc28c40",
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    "extractor-text"
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  "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",
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      "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": {
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        "pages": 15,
        "sha256": "41de8f28b106ea3c",
        "source_tier": "lcsc"
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      "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"
    },
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        "file": "vpc28c40.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-11-04",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "VPSC",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
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          "name": "输入电流 VDD",
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        {
          "name": "输出峰值电流",
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        {
          "name": "误差放大器输出吸入电流",
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        {
          "name": "最大工作结温",
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          "unit": "℃",
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          "name": "ESD 人体模式 HBM",
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          "name": "电流采样输入",
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          "name": "工作温度 VPC28C4x",
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          "min": -40,
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        {
          "name": "基准电压 VREF",
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          "name": "负载调整",
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          "symbol": "∆VREF/∆T",
          "kind": "temperature_coefficient",
          "unit": "mV/℃",
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          "name": "输出总变化",
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          "kind": "electrical",
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        {
          "name": "长期稳定性",
          "symbol": "",
          "kind": "electrical",
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          "max": 25,
          "conditions": "1000 小时, TA= 125°C",
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        {
          "name": "短路电流",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": -30,
          "typ": -50,
          "max": -70,
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        {
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          "kind": "electrical",
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          "typ": 52,
          "max": 55,
          "conditions": "TA=25℃，RT=10kΩ，CT=3.3nF",
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          "name": "频率 (RT=6.2kΩ, CT=1.0nF)",
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          "kind": "electrical",
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          "typ": 250,
          "max": 275,
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          "name": "随电压的变化",
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          "kind": "electrical",
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          "name": "RT/CT 下拉电流",
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          "name": "电流采样增益",
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          "name": "CS 到 OUT 延迟",
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          "name": "输出低电平内阻",
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          "name": "输出高电平内阻",
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          "name": "UVLO 下拉电流",
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        {
          "name": "下降时间",
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