WD1038DH-8

{
  "schema_version": 1,
  "type": "component",
  "slug": "wd1038dh-8",
  "title": "WD1038DH-8",
  "brief": "WILLSEMI Will Semicon DC-DC Converters, DFN-8-EP(2x2). 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)",
    "wd1038dh-8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "WD1038DH-8",
    "manufacturer": "WILLSEMI Will Semicon",
    "package": "DFN-8-EP(2x2)",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590210043288322048",
    "parts": {
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      "model_3d_step_plain": "wd1038dh-8.step",
      "lbr": "wd1038dh-8.lbr"
    },
    "distributor_links": {
      "lcsc": "C2941886"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T20:31:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin connected to the feedback resistor divider for the adjustable version, or to VOUT for the fixed-output version; the datasheet reference voltage is 0.6 V (0.588 V to 0.612 V)."
      },
      {
        "number": "2",
        "name": "PG",
        "type": "output",
        "description": "Power-good open-drain output that needs an external pull-up; it is pulled high when FB is within 90% of nominal and is LOW otherwise, sinking up to 1 mA with a pull-up to a rail below 5.5 V."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "power_in",
        "description": "Input supply pin, operating from 2.7 V to 5.5 V, that must be decoupled to GND with at least 10 uF of ceramic capacitance."
      },
      {
        "number": "4",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage, which must also be connected to the exposed pad for maximum power dissipation."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "6",
        "name": "LX",
        "type": "output",
        "description": "Inductor (switch node) pin that connects to the output inductor; its PCB copper area should be kept minimal to avoid noise problems."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Enable control that turns the regulator on when pulled high (VIH 1.4 V min, VIL 0.4 V max) and must not be left floating."
      },
      {
        "number": "8",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal ground for the control circuitry."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 DFN2x2-8L exposed (thermal) pad is shown in the package drawing and pin table but is not given a; The figure text extraction lists pin names in an order that does not match the numbering. The pin-de; Pin types for LX and PG are inferred from function: LX is the switching node and PG is an open-drain",
          "exposed pad 9 added from the footprint"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0467,
        "at": "2026-10-18T20:29:29"
      },
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        "sha256": "598a938265306281",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "WILLSEMI Will Semicon",
      "Package": "DFN-8-EP(2x2)",
      "Category": "Power Management (PMIC)",
      "Pins": "9"
    },
    "appearance": {
      "contacts": {
        "quote": "3) The PCB copper area associated with SW pin",
        "page": 10,
        "doc": "ds.pdf",
        "material": "copper"
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      "version": 1,
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    "characteristics": {
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          "name": "Storage Temperature Range",
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        {
          "name": "Feedback Reference",
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        {
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          "name": "Shutdown Current",
          "symbol": "ISD",
          "kind": "electrical",
          "unit": "μA",
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          "conditions": "VEN =GND, VIN =3.6V",
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          "name": "VIN Under Voltage Lockout (rising)",
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        {
          "name": "Line Regulation",
          "symbol": "ΔVOUT /ΔVIN",
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          "unit": "%/V",
          "min": null,
          "typ": 0.35,
          "max": null,
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        {
          "name": "PFET Rdson",
          "symbol": "Rdson P",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 80,
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        {
          "name": "NFET Rdson",
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          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 70,
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        {
          "name": "PFET Current Limit",
          "symbol": "ILIMT",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 4.5,
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        {
          "name": "Oscillator Frequency",
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          "name": "Max Duty Cycle",
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          "unit": "%",
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          "typ": 100,
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        {
          "name": "Soft Start Time",
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          "name": "Power on delay time",
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          "name": "Over Voltage Protection Blanking Time",
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          "name": "EN Input LOW Voltage",
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        {
          "name": "EN Input HIGH Voltage",
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    }
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  "author": {
    "name": "Ray",
    "email": "[email protected]"
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