RT7251AZQW

{
  "schema_version": 1,
  "type": "component",
  "slug": "rt7251azqw",
  "title": "RT7251AZQW",
  "brief": "Richtek Tech DC-DC Converters, WSON-8-EP(2x2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management ics",
    "rt7251azqw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "RT7251AZQW",
    "manufacturer": "Richtek Tech",
    "package": "WSON-8-EP(2x2)",
    "pin_count": 9,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/47e678b4b1674d889f5c0498d896244e.pdf",
    "parts": {
      "symbol": "rt7251azqw.kicad_sym",
      "footprint": "rt7251azqw.kicad_mod",
      "model_3d": "rt7251azqw-hero.glb",
      "model_3d_plain": "rt7251azqw-etched.glb",
      "model_3d_step": "rt7251azqw-etched.step",
      "model_3d_step_plain": "rt7251azqw.step",
      "lbr": "rt7251azqw.lbr"
    },
    "distributor_links": {
      "lcsc": "C147985",
      "digikey": "1028-1088-2-ND",
      "mouser": "835-RT7251AZQW"
    },
    "distributor_check": {
      "checked_at": "2026-10-24T00:07:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1028-1088-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "835-RT7251AZQW",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "passive",
        "description": "Switch node that connects to the external L-C filter."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage (4V to 17V operating, -0.3V to 19V absolute maximum) that must be bypassed with a suitably large ceramic capacitor."
      },
      {
        "number": "3",
        "name": "BOOT",
        "type": "passive",
        "description": "Bootstrap for the high-side gate driver; connect a 0.01μF or greater ceramic capacitor from BOOT to SW."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Chip enable where logic-high enables the converter and logic-low forces shutdown with supply current below 5μA; tie to VIN through a 100kΩ pull-up resistor for automatic startup."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to which the external resistive divider connects for an adjustable output (0.8V typ. reference)."
      },
      {
        "number": "6",
        "name": "PGOOD",
        "type": "output",
        "description": "Open-drain power good indicator that is pulled low if the output voltage is 12.5% less than the nominal voltage."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad ground that must be soldered to a large PCB and connected to GND for maximum power dissipation."
      }
    ],
    "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: Datasheet lists the package as WDFN-8L 2x2 (W-Type 8L DFN 2x2), which matches the WSON-8-EP(2x2) hin; Pin types for SW, BOOT and PGOOD are chosen by judgement, since the datasheet gives no electrical pi"
        ],
        "pages_sent": 14,
        "cost_usd": 0.1261,
        "at": "2026-10-24T00:06:54"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/47e678b4b1674d889f5c0498d896244e.pdf",
        "pages": 14,
        "sha256": "7d27605e9d836e5d",
        "source_tier": "mfr"
      },
      "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": "rt7251azqw.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2,
          1.98,
          0.82
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7672cac8d88d8679800ef3bf90954e7996ea74e8ddb1f157f2d82bca6b2015e4",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "rt7251azqw-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2,
          1.98,
          0.82
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6f03e00b6df692a7e0dcaec29d96bda201092d19e96149bc436cc780b02ea923",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Richtek Tech",
      "Package": "WSON-8-EP(2x2)",
      "Category": "Power Management ICs",
      "Pins": "9"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "7d27605e9d836e5df86f4046a83de8145590f7a9480e0de4584cb520ee869b38",
      "rows": [
        {
          "name": "Shutdown Supply Current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1,
          "max": 5,
          "conditions": "VEN = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.6,
          "max": 1,
          "conditions": "VEN = 3V, VFB = 0.9V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Feedback Reference Voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.788,
          "typ": 0.8,
          "max": 0.812,
          "conditions": "4V ≤ VIN ≤ 17V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Oscillation Frequency (RT7251A)",
          "symbol": "fOSC1",
          "kind": "electrical",
          "unit": "kHz",
          "min": 300,
          "typ": 340,
          "max": 380,
          "conditions": "For RT7251A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN Threshold Logic-High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN Threshold Logic-Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Input Voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 17,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Range",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 19,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SW Voltage",
          "symbol": "SW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Max is VIN + 0.3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BOOT to SW",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "All Other Pins",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.833,
          "conditions": "TA = 25°C, WDFN-8L 2x2",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 sec.",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD HBM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Human Body Mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD MM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Machine Mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction to Ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 120,
          "conditions": "WDFN-8L 2x2, JEDEC 51-7 four-layer board",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction to Case",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 8.2,
          "conditions": "WDFN-8L 2x2, at exposed pad",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Feedback Current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "VFB = 0.8V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High Side Switch On Resistance",
          "symbol": "RDS(ON)1",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 145,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low Side Switch On Resistance",
          "symbol": "RDS(ON)2",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 140,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short-Circuit Oscillation Frequency",
          "symbol": "fOSC2",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": 95,
          "max": null,
          "conditions": "VFB = 0V, For RT7251A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Duty Cycle",
          "symbol": "DMAX",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 93,
          "max": null,
          "conditions": "VFB = 0.7V, For RT7251A",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "rt7251azqw"
  ],
  "discovery_pitch": "RT7251AZQW (Richtek Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "rt7251azqw.kicad_sym",
    "rt7251azqw.kicad_mod",
    "rt7251azqw.glb",
    "rt7251azqw.step",
    "rt7251azqw.lbr",
    "docs/hero.png",
    "docs/rt7251azqw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "rt7251azqw-hero.glb",
    "rt7251azqw-hero.overlay.json",
    "rt7251azqw-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}