LD5521DGL

{
  "slug": "ld5521dgl",
  "version": "0.1.0",
  "type": "component",
  "description": "Leadtrend Tech AC-DC Controllers And Regulators, SOT-26. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "ld5521dgl",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ld5521dgl.kicad_sym",
    "ld5521dgl.kicad_mod",
    "ld5521dgl.glb",
    "ld5521dgl.step",
    "ld5521dgl.lbr",
    "docs/hero.png",
    "docs/ld5521dgl-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ld5521dgl-hero.glb",
    "ld5521dgl-hero.overlay.json",
    "ld5521dgl-etched.glb"
  ],
  "component": {
    "mpn": "LD5521DGL",
    "manufacturer": "Leadtrend Tech",
    "package": "SOT-26",
    "pin_count": 6,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603125093509701632",
    "parts": {
      "symbol": "ld5521dgl.kicad_sym",
      "footprint": "ld5521dgl.kicad_mod",
      "model_3d": "ld5521dgl-hero.glb",
      "model_3d_plain": "ld5521dgl-etched.glb",
      "model_3d_step": "ld5521dgl-etched.step",
      "model_3d_step_plain": "ld5521dgl.step",
      "lbr": "ld5521dgl.lbr"
    },
    "distributor_links": {
      "lcsc": "C5124412"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T17:54:52Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the controller."
      },
      {
        "number": "2",
        "name": "COMP",
        "type": "passive",
        "description": "Output of the error amplifier for voltage compensation; open-loop voltage is 5.3V typical (5.0V to 5.6V), and a capacitor of 1nF to 10nF is required on this pin for stable operation."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Auxiliary voltage sense for brown-in/brown-out, quasi-resonant detection and FB OVP; the FB OVP trip voltage is 3.5V typical (3.4V to 3.6V) and the absolute maximum rating is -0.3V to 6V."
      },
      {
        "number": "4",
        "name": "CS",
        "type": "input",
        "description": "Current sense pin that senses the MOSFET current; maximum input voltage is 0.52V typical (0.49V to 0.55V), a CS capacitor of 47pF to 470pF is recommended, and the absolute maximum rating is -0.3V to 6V."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage pin with recommended range 8.0V to 26.5V and absolute maximum 30V; VCC OVP trips at 28.5V typical and a 3.3uF to 10uF capacitor is recommended."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "Gate drive output that drives the external power MOSFET with 250mA/-500mA driving capability, with absolute maximum range -0.3V to VCC."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet gives pin names and functions but no explicit ERC electrical types; types were assigne; The OUT driving capability is stated as 250mA/-500mA in Features but as a typical 250mA in Applicati; Ordering information lists the part as 'LD5521D GL' in SOT-26 (YWT/21D marking, 3000 pcs tape & reel"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0539,
        "at": "2026-10-17T17:52:53"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603125093509701632",
        "pages": 13,
        "sha256": "cff90ee1513ad733",
        "source_tier": "lcsc"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "ld5521dgl.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": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ld5521dgl-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "42d33e84953d201735d783e9d9d8f8c111289f7e6279ceab574afee306f6812d",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}