LGS63040B5

{
  "schema_version": 1,
  "type": "component",
  "slug": "lgs63040b5",
  "title": "LGS63040B5",
  "brief": "Legend Si LED Drivers, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "led-drv",
    "lgs63040b5"
  ],
  "component": {
    "mpn": "LGS63040B5",
    "manufacturer": "Legend Si",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "LED-drv",
    "subcategory": "LED Drivers",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2304071430_Legend-Si-LGS63040B5_C5370936.pdf",
    "parts": {
      "symbol": "lgs63040b5.kicad_sym",
      "footprint": "lgs63040b5.kicad_mod",
      "model_3d": "lgs63040b5-etched.glb",
      "model_3d_plain": "lgs63040b5.glb",
      "model_3d_step": "lgs63040b5-etched.step",
      "model_3d_step_plain": "lgs63040b5.step",
      "lbr": "lgs63040b5.lbr"
    },
    "distributor_links": {
      "lcsc": "C5370936"
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Internal power switch node (drain of the 350mΩ low-side NMOS). Externally connected to the power inductor and Schottky freewheeling diode. High dv/dt node - keep copper area small to limit EMI."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference. Tie to a large ground pour for thermal and return-current path."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Enable / dimming input. Digital high (>0.5V) enables the regulator; low (<0.4V) shuts it down. On LGS63040 accepts an analog voltage 0.6V-1.2V for analog dimming of LED current; on LGS63042 accepts a 100Hz-100kHz PWM square wave for PWM dimming. Internal 800kΩ pull-down; do not leave floating. Absolute max 6V."
      },
      {
        "number": "4",
        "name": "CSN",
        "type": "input",
        "description": "LED current sense input. Connect to the LED-side node of the external sampling resistor R_Sence. Output current is set by I_OUT = (V_OUT(VIN) − V_CSN) / R_Sence, with typical V_OUT−V_CSN = 0.2V (0.195V-0.205V). High-impedance node - route short and away from SW."
      },
      {
        "number": "5",
        "name": "VIN/OUT",
        "type": "power_in",
        "description": "Combined input supply pin and output-voltage sense point. Also the VIN-side terminal of the external LED current sampling resistor R_Sence. Serves as input-voltage detection in buck mode and as output-voltage connection in boost / buck-boost mode. Operating range 3.0V-60V (abs max 60V). Bypass with 4.7µF/100V X7R or X5R ceramic near the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2304071430_Legend-Si-LGS63040B5_C5370936.pdf",
        "pages": 22,
        "sha256": "13f24f98441db88d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-5@sha256:455a3f7c3e5eb5b8",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "lgs63040b5.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          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": "lgs63040b5-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2245d3644fed4ad98a75b0984186c7059b17efa39f29a4b44c686961d02f057a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Legend Si",
      "Package": "SOT-23-5",
      "Category": "LED-drv",
      "Pins": "5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lgs63040b5"
  ],
  "discovery_pitch": "LGS63040B5 (Legend Si) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lgs63040b5.kicad_sym",
    "lgs63040b5.kicad_mod",
    "lgs63040b5.glb",
    "lgs63040b5.step",
    "lgs63040b5-etched.step",
    "lgs63040b5.lbr",
    "docs/hero.png",
    "docs/lgs63040b5-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LGS63040B5",
      "kind": "packaging"
    },
    {
      "mpn": "LGS63040B5EP",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T23:57:55.189Z"
}