bd9e104fj-e2

{
  "slug": "bd9e104fj-e2",
  "version": "0.1.0",
  "type": "component",
  "description": "ROHM DC-DC Converters, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "pmic",
    "bd9e104fj-e2"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bd9e104fj-e2.kicad_sym",
    "bd9e104fj-e2.kicad_mod",
    "bd9e104fj-e2.glb",
    "bd9e104fj-e2.step",
    "bd9e104fj-e2.lbr",
    "docs/hero.png",
    "docs/bd9e104fj-e2-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bd9e104fj-e2-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "component": {
    "mpn": "BD9E104FJ-E2",
    "manufacturer": "ROHM",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "DC-DC Converters",
    "parts": {
      "symbol": "bd9e104fj-e2.kicad_sym",
      "footprint": "bd9e104fj-e2.kicad_mod",
      "model_3d": "bd9e104fj-e2-etched.glb",
      "model_3d_plain": "bd9e104fj-e2.glb",
      "model_3d_step": "bd9e104fj-e2-etched.step",
      "model_3d_step_plain": "bd9e104fj-e2.step",
      "lbr": "bd9e104fj-e2.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "BOOT",
        "type": "passive",
        "description": "Bootstrap capacitor pin. Connect a 0.1 µF ceramic capacitor between BOOT and SW; the capacitor voltage supplies the gate drive for the internal high-side MOSFET. Absolute maximum voltage from GND to BOOT is 35.0 V."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Power supply input for the switching regulator and internal control circuits. Operating range 7.0 V to 26.0 V (absolute max −0.3 V to +30.0 V). A 10 µF ceramic decoupling capacitor is recommended close to this pin."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Enable input. Drive high (≥ 2.5 V) to enable the converter; drive low (≤ 0.8 V) to force shutdown mode. Must not be left floating. Absolute maximum EN voltage is −0.3 V to +30.0 V."
      },
      {
        "number": "4",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground for the internal control circuitry. Should be connected to the system ground plane and typically tied to PGND (pin 7) at a single low-impedance point."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the internal gm error amplifier. Connect to an external resistor divider from VOUT to set the output voltage (reference 0.8 V typ; output range 1.0 V to VIN × 0.5). Also monitored by SCP (< 0.56 V typ) and OVP (> 1.04 V typ)."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output and PWM comparator input. Connect an external RC network (phase-compensation components) from COMP to AGND to shape the control-loop response."
      },
      {
        "number": "7",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the output stage of the switching regulator (return for the low-side MOSFET). Route with wide, low-impedance copper directly to the input and output capacitor grounds."
      },
      {
        "number": "8",
        "name": "SW",
        "type": "power_out",
        "description": "Switch node. Common connection of the high-side MOSFET source and low-side MOSFET drain. Connect the output inductor here (accounting for DC-superimposition characteristic) and the bootstrap capacitor between SW and BOOT."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "lcsc": "C2070934",
      "digikey": "BD9E104FJ-E2TR-ND",
      "mouser": "755-BD9E104FJ-E2"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T18:54:16Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": "BD9E104FJ-E2TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "755-BD9E104FJ-E2",
        "status": "found"
      }
    },
    "models_3d": [
      {
        "file": "bd9e104fj-e2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bd9e104fj-e2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "919815b600de683e8daf6447ee4555c6cb39fefb62eb8eed3d588c1ed911f591",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}