MPQ4559DN-LF-Z

{
  "slug": "mpq4559dn-lf-z",
  "version": "0.1.0",
  "type": "component",
  "description": "Monolithic Power Systems DC-DC Converters, SOIC-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "mpq4559dn-lf-z",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mpq4559dn-lf-z.kicad_sym",
    "mpq4559dn-lf-z.kicad_mod",
    "mpq4559dn-lf-z.glb",
    "mpq4559dn-lf-z.step",
    "mpq4559dn-lf-z.lbr",
    "docs/hero.png",
    "docs/mpq4559dn-lf-z-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mpq4559dn-lf-z-hero.glb",
    "mpq4559dn-lf-z-hero.overlay.json",
    "mpq4559dn-lf-z-etched.glb"
  ],
  "component": {
    "mpn": "MPQ4559DN-LF-Z",
    "manufacturer": "Monolithic Power Systems",
    "package": "SOIC-8-EP",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0c4274b4ae63e2307566d3e7cb4628a0.pdf",
    "parts": {
      "symbol": "mpq4559dn-lf-z.kicad_sym",
      "footprint": "mpq4559dn-lf-z.kicad_mod",
      "model_3d": "mpq4559dn-lf-z-hero.glb",
      "model_3d_plain": "mpq4559dn-lf-z-etched.glb",
      "model_3d_step": "mpq4559dn-lf-z-etched.step",
      "model_3d_step_plain": "mpq4559dn-lf-z.step",
      "lbr": "mpq4559dn-lf-z.lbr"
    },
    "distributor_links": {
      "lcsc": "C6595713",
      "digikey": "1589-MPQ4559DN-LF-ZTR-ND",
      "mouser": "946-MPQ4559DN-LF-Z"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T12:35:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1589-MPQ4559DN-LF-ZTR-ND",
        "status": "found",
        "lifecycle": "Not For New Designs"
      },
      "mouser": {
        "pn": "946-MPQ4559DN-LF-Z",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Switch node output from the high-side switch; a low VF Schottky rectifier to ground is required and must be placed close to the SW pin to reduce switching spikes."
      },
      {
        "number": "2",
        "name": "EN",
        "type": "input",
        "description": "Enable input; pull below the specified threshold to shut down the chip, pull above the threshold or leave floating to enable it."
      },
      {
        "number": "3",
        "name": "COMP",
        "type": "passive",
        "description": "Compensation pin, the output of the GM error amplifier, where control loop frequency compensation is applied."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the error amplifier; sets the regulator voltage by comparing an external resistive divider tap to the internal 0.8V reference."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, also the exposed pad; connect close to the output capacitor avoiding high-current switch paths, and connect the exposed pad to the GND plane for optimal thermal performance."
      },
      {
        "number": "6",
        "name": "FREQ",
        "type": "passive",
        "description": "Switching frequency program input; connect a resistor from this pin to ground to set the switching frequency."
      },
      {
        "number": "7",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply (3.8V to 55V recommended) powering all internal control circuitry, both BS regulators and the high-side switch; place a decoupling capacitor to ground close to this pin."
      },
      {
        "number": "8",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap positive supply for the internal floating high-side MOSFET driver; connect a bypass capacitor between this pin and SW."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The exposed pad is listed together with GND pin 5 in the pin table and has no separate pin number, s"
        ],
        "pages_sent": 19,
        "cost_usd": 0.1429,
        "at": "2026-10-23T12:34:47"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/0c4274b4ae63e2307566d3e7cb4628a0.pdf",
        "pages": 19,
        "sha256": "022a6df274a2c6c7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mpq4559dn-lf-z.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2d6f7e774e8143e3320cbd59eb5be9f3b7864614644e3b072006e1eb05fb7fa6",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mpq4559dn-lf-z-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4072e83ff83f0feaed9b112119060b6c5528a3a37924fafbefa987b01dc06ca6",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}