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Ray Set visibility: public 3bd8ea9 6h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lp3981-28b5f",
  "title": "LP3981-28B5F",
  "brief": "LOWPOWER Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. 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)",
    "lp3981-28b5f",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LP3981-28B5F",
    "manufacturer": "LOWPOWER",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912711329177600",
    "parts": {
      "symbol": "lp3981-28b5f.kicad_sym",
      "footprint": "lp3981-28b5f.kicad_mod",
      "model_3d": "lp3981-28b5f-hero.glb",
      "model_3d_plain": "lp3981-28b5f-etched.glb",
      "model_3d_step": "lp3981-28b5f-etched.step",
      "model_3d_step_plain": "lp3981-28b5f.step",
      "lbr": "lp3981-28b5f.lbr"
    },
    "distributor_links": {
      "lcsc": "C517238"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T14:38:58Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Power input voltage pin; the recommended supply input range is 2.5V to 5.5V, and the absolute maximum supply input voltage is 6V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the LDO regulator, to be returned to a clean analog ground."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Chip enable, active high with TTL-logic thresholds (logic-high at 1.2V or above to turn on, logic-low at 0.4V or below to shut down); the pin is high impedance, so a 100kΩ pull-down to GND is recommended when the control signal may float."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; this pin is not connected internally."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output voltage pin; a ceramic output capacitor of at least 1µF with ESR greater than 25mΩ is specified to ensure stability."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "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 pin diagram text on page 2 is garbled (pin numbers and labels are scrambled), so the pin-to-name; The datasheet gives conflicting input voltage ranges: the Features list states 2V to 6.5V, while Rec; The Typical Operating Characteristics figures are labeled LP3980-15B5F and LP3980-28B5F, not LP3981,"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0252,
        "at": "2026-10-18T14:38:44"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912711329177600",
        "pages": 6,
        "sha256": "bf3050f50c362057",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "file": "lp3981-28b5f.step",
        "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,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lp3981-28b5f-etched.step",
        "role": "eda",
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "53d6e85773b9434e17945c4f94e5d7e6b08804ff9ff06c2bab148bcc318c78ab",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LOWPOWER",
      "Package": "SOT-23-5",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "bf3050f50c362057b49df4dcfc0b634e60e22daf956e75e6138a071748f7d2a2",
      "rows": [
        {
          "name": "Output Voltage Accuracy",
          "symbol": "ΔVOUT",
          "kind": "tolerance",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "IOUT = 1mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "ILIM",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 360,
          "max": 400,
          "conditions": "RLOAD = 1Ω",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 45,
          "max": 120,
          "conditions": "VEN ≥ 1.2V, IOUT = 0mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 170,
          "max": 200,
          "conditions": "IOUT = 200mA, VOUT > 2.8V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 220,
          "max": 300,
          "conditions": "IOUT = 300mA, VOUT > 2.8V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVLINE",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VIN = (VOUT + 1V) to 5.5V, IOUT = 1mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVLOAD",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "1mA < IOUT < 300mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Standby Current",
          "symbol": "ISTBY",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.01,
          "max": 1,
          "conditions": "VEN = GND, Shutdown",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "EN Input Bias Current",
          "symbol": "IIBSD",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 0.01,
          "max": 100,
          "conditions": "VEN = GND or VIN",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic-Low Voltage (EN threshold)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VIN=3V to 5.5V, Shutdown",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic-High Voltage (EN threshold)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": null,
          "max": null,
          "conditions": "VIN=3V to 5.5V, Start-Up",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Noise Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "uVRMS",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "10Hz to 100kHz, IOUT=200mA COUT=1µF",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Output Current",
          "symbol": "Imax",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "VEN=VIN, VIN>2.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Supply Input Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation SOT-25",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "TA = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering, 10 sec.)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 sec soldering",
          "source_page": 3,
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD Susceptibility HBM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Human Body Model",
          "source_page": 3,
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        },
        {
          "name": "ESD Susceptibility MM",
          "symbol": "",
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          "unit": "V",
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          "conditions": "Machine Model",
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        },
        {
          "name": "Supply Input Voltage",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 5.5,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "EN Input Voltage",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5.5,
          "conditions": "",
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        },
        {
          "name": "Operation Junction Temperature Range",
          "symbol": "",
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          "unit": "°C",
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          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Operation Ambient Temperature Range",
          "symbol": "",
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          "min": -40,
          "typ": null,
          "max": 85,
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          "source_page": 3,
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        },
        {
          "name": "Package Thermal Resistance SOT-25",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Rejection Rate",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": -76,
          "max": null,
          "conditions": "f=100Hz, COUT=1µF, IOUT=50mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Rejection Rate",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": -73,
          "max": null,
          "conditions": "f=10kHz, COUT=1µF, IOUT=50mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Temperature",
          "symbol": "TSD",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
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  "discovery_pitch": "LP3981-28B5F (LOWPOWER) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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