WD1033E-5

{
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  "type": "component",
  "slug": "wd1033e-5",
  "title": "WD1033E-5",
  "brief": "WILLSEMI Will Semicon DC-DC Converters, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management (pmic)",
    "wd1033e-5",
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  "component": {
    "mpn": "WD1033E-5",
    "manufacturer": "WILLSEMI Will Semicon",
    "package": "SOT-23-5L",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918029229445120",
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    "distributor_links": {
      "lcsc": "C915923"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T01:46:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EN",
        "type": "input",
        "description": "Enable control: pull high to turn on the device and drive to GND for shutdown; do not leave it floating. EN rising threshold is 1.4 V and falling threshold is 0.4 V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "output",
        "description": "Inductor (switch node) pin; DC voltage range is -0.3 V to VIN per the absolute maximum ratings."
      },
      {
        "number": "4",
        "name": "VIN",
        "type": "power_in",
        "description": "Input pin, operating range 2.5 V to 5.5 V; decouple to GND with at least 10 uF ceramic capacitor placed close to the pin."
      },
      {
        "number": "5",
        "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; feedback reference voltage is 0.6 V."
      }
    ],
    "provenance": {
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        "at": "2026-10-19T01:43:44"
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        "described": 5,
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  "metadata": {
    "specs": {
      "Manufacturer": "WILLSEMI Will Semicon",
      "Package": "SOT-23-5L",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
    },
    "characteristics": {
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          "symbol": "VIN",
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          "max": 5.5,
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          "name": "VIN Under Voltage Lockout Threshold, rising",
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        },
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        {
          "name": "Feedback reference Voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.588,
          "typ": 0.6,
          "max": 0.612,
          "conditions": "Vin=Vout(nom)+1 V, 0mA<=IOUT<=250MA",
          "source_page": 4,
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        },
        {
          "name": "Feedback Leakage Current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "nA",
          "min": -30,
          "typ": null,
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          "conditions": "",
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        {
          "name": "VIN pin voltage range",
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        {
          "name": "EN, FB pin voltage range",
          "symbol": "",
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          "unit": "V",
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        {
          "name": "SW pin voltage range (DC)",
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        },
        {
          "name": "Power Dissipation, SOT-23-5L",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Note 1: surface mounted on FR-4, 1 square inch pad, dual side, 1oz copper",
          "source_page": 3,
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        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "oC",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        {
          "name": "Lead temperature (soldering, 10s)",
          "symbol": "TL",
          "kind": "absolute_maximum",
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          "min": null,
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          "max": 260,
          "conditions": "Soldering, 10s",
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        },
        {
          "name": "Operating ambient temperature",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "oC",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "oC",
          "min": -55,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Standby Supply Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "VFB = 105%, IOUT = 0A",
          "source_page": 4,
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        },
        {
          "name": "VIN Under Voltage Lockout Threshold, falling",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.3,
          "max": null,
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          "source_page": 4,
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        },
        {
          "name": "Line Regulation",
          "symbol": "△LINE",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.15,
          "max": null,
          "conditions": "VIN = 2.5V to 5.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Inductor Limit Current",
          "symbol": "ILIM",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 3.5,
          "max": null,
          "conditions": "VIN = 3.6V, VOUT = 90%*VOUT",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "VFB or VOUT in regulation",
          "source_page": 4,
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        },
        {
          "name": "RDS(ON) of P-Channel FET",
          "symbol": "RPFET",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.12,
          "max": null,
          "conditions": "ISW = 100mA",
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        {
          "name": "RDS(ON) of N-Channel FET",
          "symbol": "RNFET",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.08,
          "max": null,
          "conditions": "ISW = −100mA",
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        },
        {
          "name": "EN Rising Threshold",
          "symbol": "VENH",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.4,
          "max": null,
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        {
          "name": "EN falling Threshold",
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          "max": null,
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        {
          "name": "EN Leakage Current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VIN = 5.5V, VEN = 0V or VIN",
          "source_page": 4,
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        {
          "name": "Min On Time",
          "symbol": "",
          "kind": "electrical",
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          "typ": 75,
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        {
          "name": "Max Duty Cycle",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
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        {
          "name": "Soft Start Time",
          "symbol": "",
          "kind": "electrical",
          "unit": "uS",
          "min": null,
          "typ": 700,
          "max": null,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Input OVP Shutdown, rising",
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          "unit": "V",
          "min": null,
          "typ": 6.5,
          "max": null,
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        {
          "name": "Input OVP Shutdown, falling",
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        {
          "name": "Over Voltage Protection Blanking Time",
          "symbol": "",
          "kind": "electrical",
          "unit": "uS",
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          "name": "Over Temperature Protection",
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          "unit": "oC",
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          "max": null,
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          "name": "OTP Hysteresis",
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          "kind": "electrical",
          "unit": "oC",
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          "typ": 30,
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        {
          "name": "Junction to Ambient Thermal Resistance, SOT-23-5L",
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          "min": null,
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