U3018F

{
  "schema_version": 1,
  "type": "component",
  "slug": "u3018f",
  "title": "U3018F",
  "brief": "UNI SEMIC DC-DC Converters, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "u3018f"
  ],
  "component": {
    "mpn": "U3018F",
    "manufacturer": "UNI SEMIC",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/525360b3210500f5849cf899467e96e8.pdf",
    "parts": {
      "symbol": "u3018f.kicad_sym",
      "footprint": "u3018f.kicad_mod",
      "model_3d": "u3018f-etched.glb",
      "model_3d_plain": "u3018f.glb",
      "model_3d_step": "u3018f-etched.step",
      "model_3d_step_plain": "u3018f.step",
      "lbr": "u3018f.lbr"
    },
    "distributor_links": {
      "lcsc": "C41374699"
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection. Recommended to leave floating."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Voltage feedback input pin. When left floating, the chip defaults to a 14.3V output; for adjustable output, connect a resistor divider from the output to this pin (internal reference V_FB_REF ≈ 2.0V)."
      },
      {
        "number": "3",
        "name": "Drain",
        "type": "passive",
        "description": "Drain of the internal high-voltage power MOSFET (V_BR ≈ 190V, R_dson ≈ 1.15Ω). Also used for high-voltage startup current sensing (I_HV ≈ 1-4mA at HV=150V). Absolute maximum drain voltage: -0.3 to 190V."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "passive",
        "description": "Switch node / internal MOSFET source. Pins 4 and 7 must be shorted together in the application (they form the chip ground/switch node connection per the datasheet)."
      },
      {
        "number": "5",
        "name": "VF",
        "type": "input",
        "description": "Default 14.3V feedback pin. Used for output over-voltage protection sensing; when VF > 2.4V for 3 consecutive cycles the chip enters OVP and auto-restart mode."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip supply pin, also serves as an output voltage feedback terminal. A 0.1µF ceramic decoupling capacitor is recommended. V_DD_OVP ≈ 24V, V_DD_Clamp ≈ 26V @ 10mA, absolute max 30V. Startup current I_VDD_st ≈ 100µA, operating current I_VDD_Op ≈ 800µA @ 60kHz."
      },
      {
        "number": "7",
        "name": "SW",
        "type": "passive",
        "description": "Switch node / internal MOSFET source. Pins 4 and 7 must be shorted together in the application."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the chip."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/525360b3210500f5849cf899467e96e8.pdf",
        "pages": 11,
        "sha256": "0c971a087292f446",
        "source_tier": "lcsc"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "u3018f.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "u3018f-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "402341b1d3eb73da9dd1e7483b96435001fcb29c8fc0f973713976ae9ce5d3b4",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UNI SEMIC",
      "Package": "SOP-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "u3018f"
  ],
  "discovery_pitch": "U3018F (UNI SEMIC) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "u3018f.kicad_sym",
    "u3018f.kicad_mod",
    "u3018f.glb",
    "u3018f.step",
    "u3018f-etched.step",
    "u3018f.lbr",
    "docs/hero.png",
    "docs/u3018f-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "U3018F",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T13:23:26.638Z"
}