BD9E303EFJ-LBE2

{
  "schema_version": 1,
  "type": "component",
  "slug": "bd9e303efj-lbe2",
  "title": "BD9E303EFJ-LBE2",
  "brief": "ROHM DC-DC Converters, HTSOP-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "bd9e303efj-lbe2"
  ],
  "component": {
    "mpn": "BD9E303EFJ-LBE2",
    "manufacturer": "ROHM",
    "package": "HTSOP-8-EP",
    "pin_count": 9,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2111232030_ROHM-Semicon-BD9E303EFJ-LBE2_C2922470.pdf",
    "parts": {
      "symbol": "bd9e303efj-lbe2.kicad_sym",
      "footprint": "bd9e303efj-lbe2.kicad_mod",
      "model_3d": "bd9e303efj-lbe2-etched.glb",
      "model_3d_plain": "bd9e303efj-lbe2.glb",
      "model_3d_step": "bd9e303efj-lbe2-etched.step",
      "model_3d_step_plain": "bd9e303efj-lbe2.step",
      "lbr": "bd9e303efj-lbe2.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "BOOT",
        "type": "passive",
        "description": "Bootstrap capacitor terminal for the high-side MOSFET gate driver. Connect a 0.1 µF bootstrap capacitor between BOOT and SW; the voltage on this capacitor is the gate drive voltage of the high-side MOSFET. Absolute max VBOOT: -0.3 to +45 V referenced to GND (ΔVBOOT: -0.3 to +7 V)."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Power supply input for the switching regulator and internal control circuit. Operating range 7.0 V to 36 V (abs max 40 V). A 10 µF and 0.1 µF ceramic input capacitor combination is recommended."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Enable input. Low level (≤0.8 V) forces the device into shutdown; high level (≥2.5 V) enables the device. Must be terminated (do not leave floating). Absolute max 40 V; typical IEN = 4.2 µA at VEN = 3 V."
      },
      {
        "number": "4",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground for the internal control circuitry. Should be connected to the system ground plane (star-connected to PGND at the exposed pad)."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the gm error amplifier and feedback sense node. Reference voltage VFB = 1.000 V typ (0.990-1.010 V at TJ=25°C). Set the output voltage via an external resistor divider from VOUT to FB. Abs max -0.3 to +7 V."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output and PWM comparator input. Connect external RC phase-compensation components (typical 15 kΩ + 6800 pF to AGND). Abs max -0.3 to +7 V."
      },
      {
        "number": "7",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the switching output stage (return for the low-side MOSFET). Must be tied to AGND at the exposed pad through a low-impedance path."
      },
      {
        "number": "8",
        "name": "SW",
        "type": "power_out",
        "description": "Switch node - source of the high-side MOSFET and drain of the low-side MOSFET. Connect the 0.1 µF bootstrap capacitor between SW and BOOT, and the external inductor (e.g. 10 µH) from SW to VOUT. Abs max -0.5 V to VIN+0.3 V."
      },
      {
        "number": "9",
        "name": "E-Pad",
        "type": "power_in",
        "description": "Exposed thermal pad on the package bottom. Connect to the internal PCB ground plane using multiple thermal vias for heat dissipation; electrically tied to ground."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2111232030_ROHM-Semicon-BD9E303EFJ-LBE2_C2922470.pdf",
        "pages": 31,
        "sha256": "559a764e9a5064b1",
        "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": "bd9e303efj-lbe2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.3,
          4.9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5725ef8fdb2a59de31e3e536dac45cd9ef218380d71f34406b961c302e1ec9b9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bd9e303efj-lbe2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.3,
          4.9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "99be0bff64216f358f9039ffdac917117caa0eaf7d1a47277a193f19bb0d3150",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ROHM",
      "Package": "HTSOP-8-EP",
      "Category": "PMIC",
      "Pins": "9"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "559a764e9a5064b1",
      "rows": [
        {
          "name": "Supply Current in Operating",
          "symbol": "IOPR",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.2,
          "max": 3,
          "conditions": "VFB = 1.1V, No switching",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Current in Standby",
          "symbol": "ISTBY",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0,
          "max": 10,
          "conditions": "VEN = 0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference Voltage (TJ = 25°C)",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.99,
          "typ": 1,
          "max": 1.01,
          "conditions": "TJ = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference Voltage (TJ = -40 to +150°C)",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.965,
          "typ": 1,
          "max": 1.035,
          "conditions": "TJ = -40 to +150°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "FB Input Current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": 0,
          "max": 1,
          "conditions": "VFB = 1.1V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "FOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 255,
          "typ": 300,
          "max": 345,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Duty ratio",
          "symbol": "Maxduty",
          "kind": "electrical",
          "unit": "%",
          "min": 90,
          "typ": 95,
          "max": 99,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "UVLO detection voltage",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": 4.7,
          "typ": 5,
          "max": 5.3,
          "conditions": "VIN falling",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "UVLO hysteresis voltage",
          "symbol": "VUVLOHYS",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.4,
          "max": 1.6,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN high-level input voltage",
          "symbol": "VENH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN low-level input voltage",
          "symbol": "VENL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN Input current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "µA",
          "min": 2.1,
          "typ": 4.2,
          "max": 8.4,
          "conditions": "VEN = 3V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Soft Start time",
          "symbol": "TSS",
          "kind": "timing",
          "unit": "msec",
          "min": 1.25,
          "typ": 2.5,
          "max": 5,
          "conditions": "EN rising to FB=0.85V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (recommended)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 7,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Current (recommended)",
          "symbol": "IOUT",
          "kind": "recommended_operating",
          "unit": "A",
          "min": 0,
          "typ": null,
          "max": 3,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Range (recommended)",
          "symbol": "VRANGE",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "Note 2: output pulse width not 200nsec (Typ) or less",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN Input Voltage",
          "symbol": "VEN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage from GND to BOOT",
          "symbol": "VBOOT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 45,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage from SW to BOOT",
          "symbol": "ΔVBOOT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "FB Input Voltage",
          "symbol": "VFB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "COMP Input Voltage",
          "symbol": "VCOMP",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "SW Input Voltage",
          "symbol": "VSW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Allowable Power Dissipation",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 2.76,
          "conditions": "Note 1: derate 22mW/°C for operating Ta ≥ 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C / W",
          "min": null,
          "typ": 45.2,
          "max": null,
          "conditions": "ROHM standard JEDEC board, 4-layer PCB (74.2 mm x 74.2 mm copper area on 2nd/3rd layer and reverse side)",
          "source_page": 23,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [
    {
      "mpn": "BD9E303EFJ-LBE2",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bd9e303efj-lbe2"
  ],
  "discovery_pitch": "BD9E303EFJ-LBE2 (ROHM) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bd9e303efj-lbe2.kicad_sym",
    "bd9e303efj-lbe2.kicad_mod",
    "bd9e303efj-lbe2.glb",
    "bd9e303efj-lbe2.step",
    "bd9e303efj-lbe2.lbr",
    "docs/hero.png",
    "docs/bd9e303efj-lbe2-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:42:57.823Z"
}