SY8291ABC

{
  "schema_version": 1,
  "type": "component",
  "slug": "sy8291abc",
  "title": "SY8291ABC",
  "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",
    "sy8291abc"
  ],
  "component": {
    "mpn": "SY8291ABC",
    "manufacturer": "Silergy Corp",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2911be8c12924b6fa287faf2163aceb4.pdf",
    "parts": {
      "symbol": "sy8291abc.kicad_sym",
      "footprint": "sy8291abc.kicad_mod",
      "model_3d": "sy8291abc-etched.glb",
      "model_3d_plain": "sy8291abc.glb",
      "model_3d_step": "sy8291abc-etched.step",
      "model_3d_step_plain": "sy8291abc.step",
      "lbr": "sy8291abc.lbr"
    },
    "distributor_links": {
      "lcsc": "C125896"
    },
    "pins": [
      {
        "number": "1",
        "name": "BS",
        "type": "passive",
        "description": "Boot-strap pin. Supplies the high-side gate driver via a bootstrap capacitor. Decouple to LX with a 0.1 µF (100 nF) ceramic cap. BS-to-LX voltage rating 3.6V absolute max (3.3V recommended)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground return. Also functions as the primary thermal path; maximize copper area for best thermal performance."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Output feedback pin. Connect to the center of the R1/R2 resistor divider from VOUT to program the output: VOUT = 0.6 × (1 + R1/R2). Reference is 0.6V ±2%. FB absolute max 3.6V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Enable control input. Pull high to turn on the regulator; do not float. VENH ≈ 1.5V rising, VENL ≈ 0.4V falling. Absolute max EN voltage is VIN + 0.6V."
      },
      {
        "number": "5",
        "name": "IN",
        "type": "power_in",
        "description": "Supply input pin. 5V to 40V operating range (42V absolute max). Decouple to GND with at least a 1 µF (4.7 µF recommended) low-ESR ceramic capacitor placed close to the pin."
      },
      {
        "number": "6",
        "name": "LX",
        "type": "power_out",
        "description": "Inductor / switch node. Connect to the external inductor and the anode of the freewheeling Schottky diode. Internal N-channel power FET RDS(on) ≈ 180 mΩ; current limit ≈ 2A."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/2911be8c12924b6fa287faf2163aceb4.pdf",
        "pages": 9,
        "sha256": "e4d186cfba2c4177",
        "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": "sy8291abc.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": "sy8291abc-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": "b936241981445d810d4481039e86551261671bf466d261c33bb68f61e38b0da1",
        "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": [
    "sy8291abc"
  ],
  "discovery_pitch": "SY8291ABC (Silergy Corp) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sy8291abc.kicad_sym",
    "sy8291abc.kicad_mod",
    "sy8291abc.glb",
    "sy8291abc.step",
    "sy8291abc-etched.step",
    "sy8291abc.lbr",
    "docs/hero.png",
    "docs/sy8291abc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SY8291ABC",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T09:15:19.041Z"
}