BD9328EFJ-E2

{
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  "slug": "bd9328efj-e2",
  "title": "BD9328EFJ-E2",
  "brief": "ROHM Semicon DC-DC Converters, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management (pmic)",
    "bd9328efj-e2",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "BD9328EFJ-E2",
    "manufacturer": "ROHM Semicon",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590456474557181952",
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    "distributor_links": {
      "lcsc": "C5205502"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T14:32:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
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    },
    "pins": [
      {
        "number": "1",
        "name": "BST",
        "type": "passive",
        "description": "High-side gate drive boost input, with a 0.1µF capacitor C_BS to SW and a 22Ω series resistor R_BS in the typical application; voltage limited to VSW+7V."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Power input, operating range 4.2V to 18V (absolute maximum 20V)."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "output",
        "description": "Power switching output between the integrated high-side and low-side FETs, rated -0.5V to +18V recommended and 20V absolute maximum."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin; the thermal pad is to be shorted to GND."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the error amplifier with a 0.9V (typ) feedback reference, set by the R_UP/R_DW divider."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output compensation node (RC network to ground) that sets the switching duty cycle and is limited by the SS pin voltage at startup."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Enable input with a 1.2V (typ) threshold; leaving it open shuts down the IC, and EN fall time should be within 100µs, with a 20V maximum."
      },
      {
        "number": "8",
        "name": "SS",
        "type": "passive",
        "description": "Soft start control input; a 10µA (typ) source charges the external capacitor (0.1µF gives 22ms typical soft-start time)."
      }
    ],
    "provenance": {
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          "vision extraction: provenance cannot be text-verified; needs consensus"
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        "described": 8,
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  "metadata": {
    "specs": {
      "Manufacturer": "ROHM Semicon",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "appearance": {
      "contacts": {
        "quote": "(2) The input capacitors should be connected as close as possible to the VIN terminal. (3) When there is an unused area on the PCB, please arrange the copper foil plain of DC nodes, such as GND, VIN a",
        "page": 13,
        "doc": "ds.pdf",
        "material": "copper"
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      "version": 1,
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          "name": "Supply Voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.2,
          "typ": 12,
          "max": 18,
          "conditions": "Recommended Operating Conditions, Ta= -40°C to +85°C",
          "source_page": 3,
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        },
        {
          "name": "SW Voltage",
          "symbol": "VSW",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 18,
          "conditions": "Recommended Operating Conditions, Ta= -40°C to +85°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "ISW3",
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        {
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        {
          "name": "Supply Voltage",
          "symbol": "VIN",
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        {
          "name": "Switch Voltage",
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          "conditions": "Ta = 25°C",
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        },
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          "name": "Power Dissipation for HTSOP-J8",
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          "min": null,
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          "conditions": "Note 1: derating 30.08 mW/°C above Ta ≥ 25°C; 4-layer 70.0mm x 70.0mm x 1.6mm board",
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        },
        {
          "name": "Package Thermal Resistance junction-to-ambient",
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          "kind": "thermal",
          "unit": "°C /W",
          "min": null,
          "typ": null,
          "max": 29.27,
          "conditions": "Note 2: mounted on 4-layer 50mm x 30mm x 1.6mm application board",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance junction-to-case",
          "symbol": "θjc",
          "kind": "thermal",
          "unit": "°C /W",
          "min": null,
          "typ": null,
          "max": 3.75,
          "conditions": "Note 2: mounted on 4-layer 50mm x 30mm x 1.6mm application board",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "Tjmax",
          "kind": "absolute_maximum",
          "unit": "°C",
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          "name": "EN Voltage",
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          "unit": "V",
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          "max": 20,
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          "name": "All Other Pins",
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          "min": null,
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          "conditions": "",
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        },
        {
          "name": "FB Input Bias Current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.02,
          "max": 2,
          "conditions": "",
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        },
        {
          "name": "Feedback Voltage1",
          "symbol": "VFB1",
          "kind": "electrical",
          "unit": "V",
          "min": 0.886,
          "typ": 0.9,
          "max": 0.914,
          "conditions": "Voltage Follower",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Voltage2",
          "symbol": "VFB2",
          "kind": "electrical",
          "unit": "V",
          "min": 0.882,
          "typ": 0.9,
          "max": 0.918,
          "conditions": "Ta=-25°C to +85°C",
          "source_page": 3,
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        },
        {
          "name": "Hi/Lo-Side FET Leak Current",
          "symbol": "ILEAKN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0,
          "max": 10,
          "conditions": "VIN= 18V, VSW= 0V / 18V",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Switch Current Limit",
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          "kind": "electrical",
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          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Enable Sink Current",
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          "kind": "electrical",
          "unit": "µA",
          "min": 90,
          "typ": 180,
          "max": 270,
          "conditions": "VEN= 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Enable Threshold Voltage",
          "symbol": "VEN",
          "kind": "electrical",
          "unit": "V",
          "min": 1,
          "typ": 1.2,
          "max": 1.4,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Under Voltage Lockout Threshold",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": 3.5,
          "typ": 3.75,
          "max": 4,
          "conditions": "VIN Rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Soft Start Current",
          "symbol": "ISS",
          "kind": "electrical",
          "unit": "µA",
          "min": 5,
          "typ": 10,
          "max": 15,
          "conditions": "VSS= 0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 300,
          "typ": 380,
          "max": 460,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Circuit Current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.2,
          "max": 3,
          "conditions": "VFB= 1.5V, VEN= 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Standby Current",
          "symbol": "IQUI",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 15,
          "max": 27,
          "conditions": "VEN= 0V",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
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