LM3671MFX-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm3671mfx-3-3",
  "title": "LM3671MFX-3.3",
  "brief": "Texas Instruments LM3671MFX 3 3 NOPB DC-DC Converters, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "LM3671MFX-3.3",
    "manufacturer": "Texas Instruments LM3671MFX 3 3 NOPB",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm3671mfx-3.3.pdf",
    "parts": {
      "symbol": "lm3671mfx-3-3.kicad_sym",
      "footprint": "lm3671mfx-3-3.kicad_mod",
      "model_3d": "lm3671mfx-3-3-etched.glb",
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      "lbr": "lm3671mfx-3-3.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Power supply input, 2.7 V to 5.5 V. Connect directly to the input filter (ceramic) capacitor. Absolute maximum 6 V to GND."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference. Return path for input capacitor and internal NFET synchronous rectifier."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Enable input. Device is in shutdown mode when V(EN) < 0.4 V and enabled when V(EN) > 1 V. Do not leave floating; absolute maximum GND-0.2 V to VIN+0.2 V."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Feedback analog input. For the fixed 3.3 V version, connect directly to the output filter capacitor at VOUT; the internal resistor divider sets the regulation point (internal dividers are disabled on the adjustable version)."
      },
      {
        "number": "5",
        "name": "SW",
        "type": "output",
        "description": "Switching node to the internal PFET high-side switch and NFET synchronous rectifier. Connect through the 2.2 uH power inductor to VOUT. Handles up to 600 mA load current."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm3671mfx-3.3.pdf",
        "pages": 38,
        "sha256": "c241e858da248679",
        "source_tier": "mfr"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
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        "seat": "z = 0",
        "extents_mm": [
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          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm3671mfx-3-3-etched.step",
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
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        "sha256": "2de20453052d7b39ce9a1c16697749386a051879add46f48047f671ad3ecbe8c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-23-5",
      "Category": "PMIC",
      "Pins": "5"
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "LM3671MFX-3.3 (Texas Instruments LM3671MFX 3 3 NOPB) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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  "files": [
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    "viewers/symbol.html",
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  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LM3671MFX-3.3",
      "kind": "packaging"
    },
    {
      "mpn": "LM3671MFX-3.3TL",
      "kind": "packaging"
    },
    {
      "mpn": "LM3671MFX-3.3TLX",
      "kind": "packaging"
    },
    {
      "mpn": "LM3671MFX-3.3SD",
      "kind": "packaging"
    },
    {
      "mpn": "LM3671MFX-3.3SDX",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T16:45:20.377Z"
}