main
Ray Set visibility: public 90bfe99 14d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "wl2861k33-3",
  "title": "WL2861K33-3",
  "brief": "WILLSEMI Will Semicon Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. 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)",
    "wl2861k33-3",
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  "component": {
    "mpn": "WL2861K33-3",
    "manufacturer": "WILLSEMI Will Semicon",
    "package": "SOT-89",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918058564407296",
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    "distributor_links": {
      "lcsc": "C910985"
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    "distributor_check": {
      "checked_at": "2026-10-20T09:15:58Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
        "pn": null,
        "status": "no match"
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        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the regulator, shown as pin 1 in the top-view pin configuration and listed as 'Ground' in the pin description table."
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        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Voltage input rated 4.75 V to 40 V operating (absolute maximum -0.3 V to 45 V), with the input capacitor (10 uF) to be located as close to this pin as possible."
      },
      {
        "number": "3",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated voltage output, 3.3 V for the WL2861K33-3 (3.234 V to 3.366 V), with absolute maximum VOUT range of -0.3 V to 6.5 V and 100 mA output current, with the output capacitor (10 uF) to be located as close to this pin as possible."
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        "guards": "pin_guards 0.1: passed",
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          "extractor flagged: Pin 1 description is only given as 'Ground' in the datasheet; no further electrical limit is stated ; The datasheet's Features list the output current as 100 mA while the electrical table lists IOUT_PK "
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        "cost_usd": 0.0269,
        "at": "2026-10-20T09:15:43"
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        "pages": 10,
        "sha256": "aaa0acd9fbbe39e5",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  "metadata": {
    "specs": {
      "Manufacturer": "WILLSEMI Will Semicon",
      "Package": "SOT-89",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "aaa0acd9fbbe39e50e0d0ee3a0ba17090005266a19361c7173ebf88cd5d1cd0d",
      "rows": [
        {
          "name": "VIN Input Range",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 4.75,
          "typ": null,
          "max": 40,
          "conditions": "IOUT=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (3.3V variant)",
          "symbol": "ΔVOUT",
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          "unit": "V",
          "min": 3.234,
          "typ": 3.3,
          "max": 3.366,
          "conditions": "IOUT=10mA",
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        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 10,
          "max": 15,
          "conditions": "VIN=7V, No load",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 11,
          "max": 16,
          "conditions": "VIN=24V, No load",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 13,
          "max": 20,
          "conditions": "VIN=40V, No load",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VDROP",
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          "unit": "mV",
          "min": null,
          "typ": 8,
          "max": 12,
          "conditions": "IOUT=1mA",
          "source_page": 3,
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        {
          "name": "Dropout Voltage",
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          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 800,
          "max": 1200,
          "conditions": "IOUT=100mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Temperature Coefficient of Output Voltage",
          "symbol": "ΔVo/ΔT",
          "kind": "temperature_coefficient",
          "unit": "mv/℃",
          "min": -0.5,
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          "conditions": "IOUT=1mA",
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          "source": "datasheet"
        },
        {
          "name": "VIN Range (absolute maximum)",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 45,
          "conditions": "",
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        },
        {
          "name": "VOUT Range (absolute maximum)",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "oC",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "oC",
          "min": -55,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "",
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          "unit": "oC",
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        {
          "name": "ESD MM",
          "symbol": "",
          "kind": "absolute_maximum",
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          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Supply Voltage",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.75,
          "typ": null,
          "max": 40,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "oC",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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        {
          "name": "Power Dissipation (recommended table)",
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          "kind": "recommended_operating",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "",
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        },
        {
          "name": "Thermal Resistance (On PCB)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "oC/W",
          "min": null,
          "typ": 77,
          "max": null,
          "conditions": "On PCB",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Output Current",
          "symbol": "IOUT_PK",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "VIN= VOUT+2V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVLoad",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.6,
          "max": null,
          "conditions": "IOUT=1--100mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Noise",
          "symbol": "eNO",
          "kind": "electrical",
          "unit": "μV",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "IOUT=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "VIN=10V, VPP=0.5V, IOUT=1mA, f=100Hz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
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          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 45,
          "max": null,
          "conditions": "VIN=10V, VPP=0.5V, IOUT=1mA, f=1KHz",
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        {
          "name": "Ripple Rejection",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 35,
          "max": null,
          "conditions": "VIN=10V, VPP=0.5V, IOUT=1mA, f=10KHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Protection",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 165,
          "max": null,
          "conditions": "IOUT=1mA",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "WL2861K33-3 (WILLSEMI Will Semicon) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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