BCT1901EGG-TR

{
  "schema_version": 1,
  "type": "component",
  "slug": "bct1901egg-tr",
  "title": "BCT1901EGG-TR",
  "brief": "BROADCHIP DC-DC Converters, QFN-24-EP(4x4). 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",
    "bct1901egg-tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BCT1901EGG-TR",
    "manufacturer": "BROADCHIP",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589837362483265536",
    "parts": {
      "symbol": "bct1901egg-tr.kicad_sym",
      "footprint": "bct1901egg-tr.kicad_mod",
      "model_3d": "bct1901egg-tr-hero.glb",
      "model_3d_plain": "bct1901egg-tr-etched.glb",
      "model_3d_step": "bct1901egg-tr-etched.step",
      "model_3d_step_plain": "bct1901egg-tr.step",
      "lbr": "bct1901egg-tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2962006"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T00:04:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "3",
        "name": "LX1",
        "type": "output",
        "description": "Power switching output of regulator 1 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "4",
        "name": "EN1",
        "type": "input",
        "description": "Active-high enable pin of regulator 1, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "5",
        "name": "FB2",
        "type": "input",
        "description": "Output feedback pin of regulator 2 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "6",
        "name": "IN2",
        "type": "power_in",
        "description": "Power supply input of regulator 2, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "9",
        "name": "LX2",
        "type": "output",
        "description": "Power switching output of regulator 2 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "10",
        "name": "EN2",
        "type": "input",
        "description": "Active-high enable pin of regulator 2, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "11",
        "name": "FB3",
        "type": "input",
        "description": "Output feedback pin of regulator 3 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "12",
        "name": "IN3",
        "type": "power_in",
        "description": "Power supply input of regulator 3, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "15",
        "name": "LX3",
        "type": "output",
        "description": "Power switching output of regulator 3 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "16",
        "name": "EN3",
        "type": "input",
        "description": "Active-high enable pin of regulator 3, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "17",
        "name": "FB4",
        "type": "input",
        "description": "Output feedback pin of regulator 4 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "18",
        "name": "IN4",
        "type": "power_in",
        "description": "Power supply input of regulator 4, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "20",
        "name": "LX4",
        "type": "output",
        "description": "Power switching output of regulator 4 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "21",
        "name": "EN4",
        "type": "input",
        "description": "Active-high enable pin of regulator 4, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "22",
        "name": "FB1",
        "type": "input",
        "description": "Output feedback pin of regulator 1 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "23",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "24",
        "name": "IN1",
        "type": "power_in",
        "description": "Power supply input of regulator 1, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "Ground and thermal pin (exposed pad) for the package."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin types for LX (switching node), FB, and EN are inferred from the functional descriptions because ; The pin configuration drawing text was garbled in extraction, so pin positions were taken from the p; Pin 25 is the GND thermal pin that serves as the exposed pad of the QFN package. The datasheet names"
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        "at": "2026-10-21T00:00:02"
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        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "units": "mm",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "BROADCHIP",
      "Package": "QFN-24-EP(4x4)",
      "Category": "Power Supply Chip",
      "Pins": "25"
    },
    "characteristics": {
      "version": 1,
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          "name": "VIN Input Supply Voltage",
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          "max": 5.5,
          "conditions": "",
          "source_page": 5,
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        },
        {
          "name": "Feedback Voltage",
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          "kind": "electrical",
          "unit": "V",
          "min": 0.585,
          "typ": 0.6,
          "max": 0.615,
          "conditions": "",
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          "source": "datasheet"
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        {
          "name": "Shutdown Supply Current",
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          "name": "Input Supply Voltage",
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        {
          "name": "ENn, FBn, SWn pin voltage (absolute maximum -0.3V to VIN+0.3V)",
          "symbol": "",
          "kind": "absolute_maximum",
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          "conditions": "Upper limit printed as VIN+0.3V, not a number",
          "source_page": 4,
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        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
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          "unit": "℃",
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        {
          "name": "Junction Temperature",
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          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
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        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
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        {
          "name": "VIN UVLO Threshold",
          "symbol": "VIN_MIN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.4,
          "max": null,
          "conditions": "VIN Rising",
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          "source": "datasheet"
        },
        {
          "name": "VIN Under Voltage Lockout Threshold Hysteresis",
          "symbol": "VIN_MIN_HYST",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "VIN Falling",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Current @ A(1)",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "VEN=5V, VFB=0.63V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Current @ B(2)",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 55,
          "max": null,
          "conditions": "VEN=5V, VFB=0.63V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Top Switch On-Resistance @ A(1)",
          "symbol": "RDS(ON)T",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 200,
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          "source": "datasheet"
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        {
          "name": "Top Switch On-Resistance @ B(2)",
          "symbol": "RDS(ON)T",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 110,
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          "name": "Bottom Switch On-Resistance @ A(1)",
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          "unit": "mΩ",
          "min": null,
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          "source_page": 5,
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        },
        {
          "name": "Bottom Switch On-Resistance @ B(2)",
          "symbol": "RDS(ON)B",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
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        },
        {
          "name": "Switch Frequency @ A(1)",
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          "kind": "electrical",
          "unit": "MHz",
          "min": null,
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          "name": "Switch Frequency @ B(2)",
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          "unit": "MHz",
          "min": null,
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          "name": "Top Switch Current Limit @ A(1)",
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          "unit": "A",
          "min": null,
          "typ": 1.8,
          "max": null,
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          "source": "datasheet"
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          "name": "Top Switch Current Limit @ B(2)",
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          "unit": "A",
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          "source_page": 5,
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        {
          "name": "Max Duty Cycle",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
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        },
        {
          "name": "Minimum On Time @ A(1)",
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          "min": null,
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          "name": "Minimum On Time @ B(2)",
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          "min": null,
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          "name": "EN Falling threshold",
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          "kind": "electrical",
          "unit": "V",
          "min": null,
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          "max": null,
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          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN Input current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VEN = 0V to VIN",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Soft-Start Time",
          "symbol": "tSS",
          "kind": "electrical",
          "unit": "ms",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Temperature",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 160,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Hysteresis",
          "symbol": "THYS",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "BCT1901EGG-TR (BROADCHIP) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
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