BD9E302EFJ-E2

{
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  "type": "component",
  "slug": "bd9e302efj-e2",
  "title": "BD9E302EFJ-E2",
  "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": [
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  "component": {
    "mpn": "BD9E302EFJ-E2",
    "manufacturer": "ROHM",
    "package": "HTSOP-8-EP",
    "pin_count": 9,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2ad61860c6b5efcbde79267f87cc4bda.pdf",
    "parts": {
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      "lbr": "bd9e302efj-e2.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "BOOT",
        "type": "passive",
        "description": "Bootstrap capacitor terminal for high-side MOSFET gate drive. Connect a 0.1 uF ceramic capacitor between BOOT and SW; the capacitor voltage becomes the gate-drive rail for the high-side MOSFET."
      },
      {
        "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 28 V (absolute max +30 V). A 10 uF + 0.1 uF ceramic input capacitor is recommended."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Enable input. Low level (<=0.8 V) forces shutdown mode; high level (>=2.5 V) enables the device. Must be driven (not left floating). Typical EN input current 4 uA at VEN=3 V."
      },
      {
        "number": "4",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for the internal control circuitry. Should be tied to the system ground plane at a low-noise point separate from the switching (PGND) return."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback / inverting input to the gm error amplifier. Internal reference is 0.800 V (typ); an external resistor divider from VOUT sets the output voltage. Input current +/-1 uA max."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error-amplifier output / current-comparator input. Connect an R-C phase-compensation network to AGND here to set the loop response."
      },
      {
        "number": "7",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the output stage (low-side MOSFET source). Carries the switching return current; route as a low-impedance plane to the input capacitor negative terminal."
      },
      {
        "number": "8",
        "name": "SW",
        "type": "power_out",
        "description": "Switch node: source of the internal high-side MOSFET and drain of the low-side MOSFET. Connect the power inductor here and the 0.1 uF bootstrap capacitor to BOOT. Rated -0.5 V to VIN+0.3 V."
      },
      {
        "number": "9",
        "name": "E-Pad",
        "type": "power_in",
        "description": "Exposed thermal pad on package underside. Solder to the PCB ground plane using multiple thermal vias for heat dissipation; electrically tied to internal ground."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/2ad61860c6b5efcbde79267f87cc4bda.pdf",
        "pages": 43,
        "sha256": "d4f722bb50e05130",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.3,
          4.9,
          1.1
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5725ef8fdb2a59de31e3e536dac45cd9ef218380d71f34406b961c302e1ec9b9",
        "checked": "2026-10-07",
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        "sha256": "1dd212c6f72796c6f0e41c9641cba3a134b242403290a4707d09d3ff9f393bb8",
        "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"
    }
  },
  "variants": [
    {
      "mpn": "BD9E302EFJ-E2",
      "kind": "packaging"
    }
  ],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "BD9E302EFJ-E2 (ROHM) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "files": [
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  "visibility": {
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  "updated_at": "2026-09-24T17:42:50.016Z"
}