SY8401ABC

{
  "schema_version": 1,
  "type": "component",
  "slug": "sy8401abc",
  "title": "SY8401ABC",
  "brief": "Silergy Corp DC-DC Converters, SOT-23-6. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "sy8401abc"
  ],
  "component": {
    "mpn": "SY8401ABC",
    "manufacturer": "Silergy Corp",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/3b37598952964502b9ea208855e7f33d.pdf",
    "parts": {
      "symbol": "sy8401abc.kicad_sym",
      "footprint": "sy8401abc.kicad_mod",
      "model_3d": "sy8401abc-etched.glb",
      "model_3d_plain": "sy8401abc.glb",
      "model_3d_step": "sy8401abc-etched.step",
      "model_3d_step_plain": "sy8401abc.step",
      "lbr": "sy8401abc.lbr"
    },
    "distributor_links": {
      "lcsc": "C125906"
    },
    "pins": [
      {
        "number": "1",
        "name": "BS",
        "type": "passive",
        "description": "Boot-strap pin supplying the high-side gate driver. Decouple to LX with a 100nF (0.1uF) low-ESR ceramic capacitor. Absolute maximum BS-LX = 4V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin. Also serves as the case position for θ_JC measurement on the SOT23-6 package; maximize copper area for best thermal and noise performance."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Output feedback pin. Connect to the center of an external resistor divider to program the output voltage: VOUT = 0.6V × (1 + R1/R2). Reference voltage 0.594-0.606V; FB input current ±50nA max."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Enable control. Pull high (>1.26V) to turn on, pull low (<0.94V) to shut down (I_SHDN < 10µA). Do not leave floating; consider a 1MΩ pull-down to GND if the driving source is high-impedance at shutdown."
      },
      {
        "number": "5",
        "name": "IN",
        "type": "power_in",
        "description": "Input supply pin, 4.5V to 50V operating range (absolute maximum 55V). Decouple to GND with at least 1uF (10uF X5R low-ESR ceramic recommended) placed close to the IN/GND pins."
      },
      {
        "number": "6",
        "name": "LX",
        "type": "power_out",
        "description": "Switching node / inductor pin. Connects internally to the drain of the high-side N-channel power FET (RDS(ON) = 700mΩ typ). Connect to the external inductor; minimize PCB copper area on this net to reduce EMI. Peak current limit 1.05-1.65A."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/3b37598952964502b9ea208855e7f33d.pdf",
        "pages": 10,
        "sha256": "5406cac6f9b1f5fd",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "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-23-6@sha256:f341c73aac9dcb55",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "sy8401abc.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": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sy8401abc-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": "bb6320fcd17be62280a6a847713bfad6157e7a99beaa5e71e7c784cf8a8bc741",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Silergy Corp",
      "Package": "SOT-23-6",
      "Category": "PMIC",
      "Pins": "6"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sy8401abc"
  ],
  "discovery_pitch": "SY8401ABC (Silergy Corp) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sy8401abc.kicad_sym",
    "sy8401abc.kicad_mod",
    "sy8401abc.glb",
    "sy8401abc.step",
    "sy8401abc-etched.step",
    "sy8401abc.lbr",
    "docs/hero.png",
    "docs/sy8401abc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SY8401ABC",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T09:15:52.661Z"
}