LM2674M-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2674m-3-3",
  "title": "LM2674M-3.3",
  "brief": "UMW 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": [
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    "pmic",
    "lm2674m-3.3"
  ],
  "component": {
    "mpn": "LM2674M-3.3",
    "manufacturer": "UMW",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2401081048_UMW-Youtai-Semiconductor-Co---Ltd--LM2674M-3-3-UMW_C5563867.pdf",
    "parts": {
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      "footprint": "lm2674m-3-3.kicad_mod",
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      "model_3d_plain": "lm2674m-3-3.glb",
      "model_3d_step": "lm2674m-3-3-etched.step",
      "model_3d_step_plain": "lm2674m-3-3.step",
      "lbr": "lm2674m-3-3.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "CB",
        "type": "passive",
        "description": "Boost capacitance terminal. External bootstrap capacitor (typ. 10 nF / 103 50 V) connects between CB and VSW to develop the gate drive rail needed to fully enhance the internal high-side switch."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "Empty port. No internal connection; leave floating or tie to a non-conducting net."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "Empty port. No internal connection; leave floating or tie to a non-conducting net."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Feedback control terminal. Senses the regulated output; for the fixed 3.3 V version this pin is tied directly to VOUT. Absolute rating: -0.3 V to VIN."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "Enable terminal with hysteresis: High = ON, Low = OFF. TTL-compatible shutdown input. VON(ON) min 1.5 V, VON(OFF) max 0.8 V; absolute range -0.3 V to 6 V. Shutdown current typ. 100 µA."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Power supply ground terminal. Common return for the input supply, control circuitry, and internal power switch."
      },
      {
        "number": "7",
        "name": "VIN",
        "type": "power_in",
        "description": "Positive terminal of power supply. Operating input voltage range 7 V-40 V, absolute maximum 45 V. Bypass locally with a 100 µF (typ.) input capacitor."
      },
      {
        "number": "8",
        "name": "VSW",
        "type": "power_out",
        "description": "Power switch output terminal (SW). Connects to the external inductor and catch diode of the buck power stage. Absolute range -1 V to VIN."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2401081048_UMW-Youtai-Semiconductor-Co---Ltd--LM2674M-3-3-UMW_C5563867.pdf",
        "pages": 14,
        "sha256": "8da892f0ae83409e",
        "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": [
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        "file": "lm2674m-3-3.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": "lm2674m-3-3-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "footprint_binding": "identity",
        "sha256": "d76ad6c0b60e09781340315de8f912c23b45dc84bce6c758256e3c27ee018e77",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm2674m-3.3"
  ],
  "discovery_pitch": "LM2674M-3.3 (UMW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
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    "lm2674m-3-3.kicad_mod",
    "lm2674m-3-3.glb",
    "lm2674m-3-3.step",
    "lm2674m-3-3-etched.step",
    "lm2674m-3-3.lbr",
    "docs/hero.png",
    "docs/lm2674m-3-3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
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  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LM2674M-3.3",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T16:18:06.284Z"
}