BD71847AMWV-E2

{
  "schema_version": 1,
  "type": "component",
  "slug": "bd71847amwv-e2",
  "title": "BD71847AMWV-E2",
  "brief": "ROHM Semicon DC-DC Converters, QFN-56-EP(7x7). 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 supply chip",
    "bd71847amwv-e2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BD71847AMWV-E2",
    "manufacturer": "ROHM Semicon",
    "package": "QFN-56-EP(7x7)",
    "pin_count": 57,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0f8d65fbc26d0543d324455d256dce4d.pdf",
    "parts": {
      "symbol": "bd71847amwv-e2.kicad_sym",
      "footprint": "bd71847amwv-e2.kicad_mod",
      "model_3d": "bd71847amwv-e2-hero.glb",
      "model_3d_plain": "bd71847amwv-e2-etched.glb",
      "model_3d_step": "bd71847amwv-e2-etched.step",
      "model_3d_step_plain": "bd71847amwv-e2.step",
      "lbr": "bd71847amwv-e2.lbr"
    },
    "distributor_links": {
      "lcsc": "C2658851"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T19:09:07Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN_3P3",
        "type": "power_in",
        "description": "Input supply from BUCK6 (3.3 V) for LDO3 and MUXSW."
      },
      {
        "number": "2",
        "name": "WDOG_B",
        "type": "input",
        "description": "Watchdog input from the processor, referenced to DVDD."
      },
      {
        "number": "3",
        "name": "RTC_RESET_B",
        "type": "output",
        "description": "Open-drain power OK signal for LDO1 and LDO2, referenced to DVDD and needing an external pull-up to DVDD."
      },
      {
        "number": "4",
        "name": "LDO5_VOUT",
        "type": "power_out",
        "description": "LDO5 output (0.8 V to 3.3 V, 300 mA)."
      },
      {
        "number": "5",
        "name": "VSYS",
        "type": "power_in",
        "description": "Input supply from VSYS for LDO3 and LDO5."
      },
      {
        "number": "6",
        "name": "LDO3_VOUT",
        "type": "power_out",
        "description": "LDO3 output (1.8 V to 3.3 V, 300 mA)."
      },
      {
        "number": "7",
        "name": "VIN_3P3",
        "type": "power_in",
        "description": "Input supply from BUCK6 (3.3 V) for LDO3 and MUXSW."
      },
      {
        "number": "8",
        "name": "LDO2_VOUT",
        "type": "power_out",
        "description": "LDO2 output (0.9 V or 0.8 V, 10 mA)."
      },
      {
        "number": "9",
        "name": "VSYS",
        "type": "power_in",
        "description": "Input supply from VSYS for LDO1 and LDO2."
      },
      {
        "number": "10",
        "name": "LDO1_VOUT",
        "type": "power_out",
        "description": "LDO1 output (3.0 V to 3.3 V or 1.6 V to 1.9 V, 10 mA)."
      },
      {
        "number": "11",
        "name": "INTLDO1P5",
        "type": "power_out",
        "description": "Output of the internal 1.5 V LDO that powers the PMIC; also supplies the crystal oscillator."
      },
      {
        "number": "12",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground, 0 V."
      },
      {
        "number": "13",
        "name": "XOUT",
        "type": "output",
        "description": "32.768 kHz crystal output."
      },
      {
        "number": "14",
        "name": "XIN",
        "type": "input",
        "description": "32.768 kHz crystal input."
      },
      {
        "number": "15",
        "name": "PMIC_ON_REQ",
        "type": "input",
        "description": "Power on/off control input from the processor, referenced to VSYS."
      },
      {
        "number": "16",
        "name": "PMIC_STBY_REQ",
        "type": "input",
        "description": "Standby request input from the processor, referenced to DVDD."
      },
      {
        "number": "17",
        "name": "BUCK1_FB",
        "type": "input",
        "description": "BUCK1 feedback sense input."
      },
      {
        "number": "18",
        "name": "BUCK1_VIN",
        "type": "power_in",
        "description": "BUCK1 switcher input supply from VSYS."
      },
      {
        "number": "19",
        "name": "BUCK1_LX",
        "type": "output",
        "description": "BUCK1 switch node connection."
      },
      {
        "number": "20",
        "name": "BUCK1_LX",
        "type": "output",
        "description": "BUCK1 switch node connection."
      },
      {
        "number": "21",
        "name": "BUCK2_LX",
        "type": "output",
        "description": "BUCK2 switch node connection."
      },
      {
        "number": "22",
        "name": "BUCK2_LX",
        "type": "output",
        "description": "BUCK2 switch node connection."
      },
      {
        "number": "23",
        "name": "BUCK2_VIN",
        "type": "power_in",
        "description": "BUCK2 switcher input supply from VSYS."
      },
      {
        "number": "24",
        "name": "BUCK2_FB",
        "type": "input",
        "description": "BUCK2 feedback sense input."
      },
      {
        "number": "25",
        "name": "POR_B",
        "type": "output",
        "description": "Open-drain power-on reset output, referenced to DVDD and needing an external pull-up to DVDD."
      },
      {
        "number": "26",
        "name": "SCL",
        "type": "input",
        "description": "I2C clock input, referenced to DVDD and needing an external pull-up to DVDD."
      },
      {
        "number": "27",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C data line, referenced to DVDD and needing an external pull-up to DVDD."
      },
      {
        "number": "28",
        "name": "DVDD",
        "type": "power_in",
        "description": "Interface input supply for the digital I/O."
      },
      {
        "number": "29",
        "name": "C32K_OUT",
        "type": "output",
        "description": "32.768 kHz clock output, referenced to DVDD."
      },
      {
        "number": "30",
        "name": "BUCK5_FB",
        "type": "input",
        "description": "BUCK5 feedback sense input."
      },
      {
        "number": "31",
        "name": "BUCK5_VIN",
        "type": "power_in",
        "description": "BUCK5 switcher input supply from VSYS."
      },
      {
        "number": "32",
        "name": "BUCK5_VIN",
        "type": "power_in",
        "description": "BUCK5 switcher input supply from VSYS."
      },
      {
        "number": "33",
        "name": "BUCK5_LX",
        "type": "output",
        "description": "BUCK5 switch node connection."
      },
      {
        "number": "34",
        "name": "BUCK5_LX",
        "type": "output",
        "description": "BUCK5 switch node connection."
      },
      {
        "number": "35",
        "name": "BUCK8_LX",
        "type": "output",
        "description": "BUCK8 switch node connection."
      },
      {
        "number": "36",
        "name": "BUCK8_LX",
        "type": "output",
        "description": "BUCK8 switch node connection."
      },
      {
        "number": "37",
        "name": "BUCK8_VIN",
        "type": "power_in",
        "description": "BUCK8 switcher input supply from VSYS."
      },
      {
        "number": "38",
        "name": "BUCK8_FB",
        "type": "input",
        "description": "BUCK8 feedback sense input."
      },
      {
        "number": "39",
        "name": "IRQ_B",
        "type": "output",
        "description": "Open-drain interrupt output to the processor, referenced to DVDD and needing an external pull-up to DVDD."
      },
      {
        "number": "40",
        "name": "PWRON_B",
        "type": "input",
        "description": "Power button input, referenced to VSYS; connect to VSYS when the power button function is not used."
      },
      {
        "number": "41",
        "name": "VSYS",
        "type": "power_in",
        "description": "Input supply from VSYS for LDO4."
      },
      {
        "number": "42",
        "name": "LDO4_VOUT",
        "type": "power_out",
        "description": "LDO4 output (0.9 V to 1.8 V, 250 mA)."
      },
      {
        "number": "43",
        "name": "VIN_1P8_1",
        "type": "power_in",
        "description": "Input supply from BUCK7 (1.8 V) for LDO4 and LDO6."
      },
      {
        "number": "44",
        "name": "LDO6_VOUT",
        "type": "power_out",
        "description": "LDO6 output (0.9 V to 1.8 V, 300 mA)."
      },
      {
        "number": "45",
        "name": "SD_VSELECT",
        "type": "input",
        "description": "Voltage select input for the SD load switch (MUXSW), referenced to DVDD; low selects 3.3 V and DVDD selects 1.8 V."
      },
      {
        "number": "46",
        "name": "BUCK6_FB",
        "type": "input",
        "description": "BUCK6 feedback sense input."
      },
      {
        "number": "47",
        "name": "BUCK6_VIN",
        "type": "power_in",
        "description": "BUCK6 switcher input supply from VSYS."
      },
      {
        "number": "48",
        "name": "BUCK6_VIN",
        "type": "power_in",
        "description": "BUCK6 switcher input supply from VSYS."
      },
      {
        "number": "49",
        "name": "BUCK6_LX",
        "type": "output",
        "description": "BUCK6 switch node connection."
      },
      {
        "number": "50",
        "name": "BUCK6_LX",
        "type": "output",
        "description": "BUCK6 switch node connection."
      },
      {
        "number": "51",
        "name": "BUCK7_LX",
        "type": "output",
        "description": "BUCK7 switch node connection."
      },
      {
        "number": "52",
        "name": "BUCK7_LX",
        "type": "output",
        "description": "BUCK7 switch node connection."
      },
      {
        "number": "53",
        "name": "BUCK7_VIN",
        "type": "power_in",
        "description": "BUCK7 switcher input supply from VSYS."
      },
      {
        "number": "54",
        "name": "BUCK7_FB",
        "type": "input",
        "description": "BUCK7 feedback sense input."
      },
      {
        "number": "55",
        "name": "MUXSW_VOUT",
        "type": "power_out",
        "description": "MUXSW (load switch) output, 3.3 V or 1.8 V with 500 mOhm max on-resistance."
      },
      {
        "number": "56",
        "name": "VIN_1P8_2",
        "type": "power_in",
        "description": "Input supply from BUCK7 (1.8 V) for MUXSW."
      },
      {
        "number": "57",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: The datasheet does not number the exposed pad. 'EP' is a placeholder. The center pad and four corner; Several pin names repeat across different pin numbers (VSYS at 5, 9 and 41; VIN_3P3 at 1 and 7). Eac; Pin types for the LX switch nodes, the open-drain outputs and the XIN/XOUT crystal pins are inferred"
        ],
        "pages_sent": 16,
        "cost_usd": 0.2728,
        "at": "2026-10-22T19:08:39"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/0f8d65fbc26d0543d324455d256dce4d.pdf",
        "pages": 119,
        "sha256": "393e3e23663c5173",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 57,
        "described": 57,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bd71847amwv-e2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          7,
          0.885
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b42d9b0c7a8d55564f4e9bb74be3ab877d958a268411c07a496787496cfb1b99",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bd71847amwv-e2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          7,
          0.885
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "a68eeca40b43d0bdfe218820983b30b87cb5e0688b96b09c1d829c038806d058",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ROHM Semicon",
      "Package": "QFN-56-EP(7x7)",
      "Category": "Power Supply Chip",
      "Pins": "57"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "393e3e23663c5173bbd6ac3968d78d772393b5cfc690926cf6c250d95e0c925f",
      "rows": [
        {
          "name": "Voltage range VSYS, BUCKx_VIN, VIN_1P8_x, VIN_3P3, PWRON_B, PMIC_ON_REQ",
          "symbol": "VAMR_1",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "Ta=25 °C",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Voltage range DVDD",
          "symbol": "VAMR_2",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4.5,
          "conditions": "Ta=25 °C",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Voltage range INTLDO1P5",
          "symbol": "VAMR_3",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 2.1,
          "conditions": "Ta=25 °C",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Voltage range BUCKx_LX",
          "symbol": "VAMR_4",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": 7,
          "conditions": "-1.0 (DC), -2.0 (10 ns)",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Voltage range SCL, SDA, IRQ_B, POR_B, WDOG_B, RTC_RESET_B, PMIC_STBY_REQ, SD_VSELECT, C32K_OUT",
          "symbol": "VAMR_5",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4.5,
          "conditions": "Ta=25 °C",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Voltage range BUCKx_FB, LDOx_VOUT, MUXSW_VOUT",
          "symbol": "VAMR_6",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4.5,
          "conditions": "Ta=25 °C",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Voltage range XIN, XOUT",
          "symbol": "VAMR_7",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 2.1,
          "conditions": "Ta=25 °C",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "Tjmax",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 76.8,
          "max": null,
          "conditions": "1s board, JESD51-3, still air",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Junction to top characterization parameter",
          "symbol": "ΨJT",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 6,
          "max": null,
          "conditions": "",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage VSYS, BUCK1_VIN, BUCK2_VIN, BUCK5_VIN to BUCK8_VIN",
          "symbol": "VOPR_1",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": 5,
          "max": 5.5,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "Voltage range VIN_3P3",
          "symbol": "VOPR_2",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "Voltage range VIN_1P8_1",
          "symbol": "VOPR_3",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.71,
          "typ": 1.8,
          "max": 5.5,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "Voltage range VIN_1P8_2",
          "symbol": "VOPR_4",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.71,
          "typ": 1.8,
          "max": 1.89,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "Voltage range DVDD",
          "symbol": "VOPR_5",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.71,
          "typ": 1.8,
          "max": 3.6,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": 25,
          "max": 105,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "VSYS circuit current 1",
          "symbol": "IQ_VSYS1",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 14,
          "max": 23,
          "conditions": "READY State",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "VSYS circuit current 2",
          "symbol": "IQ_VSYS2",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 30,
          "max": 50,
          "conditions": "SNVS State",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "VSYS circuit current 3",
          "symbol": "IQ_VSYS3",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 126,
          "max": 195,
          "conditions": "SUSPEND State",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "VSYS circuit current 4",
          "symbol": "IQ_VSYS4",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 147,
          "max": 216,
          "conditions": "IDLE State",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "VSYS circuit current 5",
          "symbol": "IQ_VSYS5",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 147,
          "max": 216,
          "conditions": "Run State",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "DVDD circuit current 1",
          "symbol": "IQ_DVDD1",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "DVDD static current (OUT32K_EN=0)",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "DVDD circuit current 2",
          "symbol": "IQ_DVDD2",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "DVDD operation current (OUT32K_EN=1)",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "VSYS UVLO release voltage",
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