main
Ray Set visibility: public bc95065 2d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bd54fa1fp3-ztl",
  "title": "BD54FA1FP3-ZTL",
  "brief": "ROHM Semicon Linear Voltage Regulators (LDO), SOT-89-3. 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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  "component": {
    "mpn": "BD54FA1FP3-ZTL",
    "manufacturer": "ROHM Semicon",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "Power Supply Chip",
    "subcategory": "Linear Voltage Regulators (LDO)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/599f45c0ad4757eb0a5200cc43858194.pdf",
    "parts": {
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      "footprint": "bd54fa1fp3-ztl.kicad_mod",
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      "model_3d_plain": "bd54fa1fp3-ztl-etched.glb",
      "model_3d_step": "bd54fa1fp3-ztl-etched.step",
      "model_3d_step_plain": "bd54fa1fp3-ztl.step",
      "lbr": "bd54fa1fp3-ztl.lbr"
    },
    "distributor_links": {
      "lcsc": "C3748950"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T21:07:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 802 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VO",
        "type": "power_out",
        "description": "Regulated 5.4V output pin (±1% accuracy, up to 0.1A) that needs a ceramic output capacitor of at least 0.3µF to GND for stability."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, which must be the lowest voltage of all pins; the reverse-side FIN is connected to this pin."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_in",
        "description": "Input supply pin, recommended range Vo+3.0V to 25.0V (absolute maximum -0.3 to +30.0V), with an input capacitor placed close to the pin."
      }
    ],
    "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 lists a reverse-side FIN tab that is internally connected to GND (pin 2) but gives it ; The datasheet text names the package SOT89-3K, not SOT-89-3. The pinout comes from the SOT89-3K pin "
        ],
        "pages_sent": 17,
        "cost_usd": 0.1088,
        "at": "2026-10-23T21:06:01"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/599f45c0ad4757eb0a5200cc43858194.pdf",
        "pages": 17,
        "sha256": "cd3a9ca9368f7f94",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "sha256": "67ae811fecee748d8734e14a9b2d13d2db977ab7ca007a156f5b397ed7134759",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ROHM Semicon",
      "Package": "SOT-89-3",
      "Category": "Power Supply Chip",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "cd3a9ca9368f7f941a259718f1f0f4cc3761290e71c9e70e689d95d24d76f1aa",
      "rows": [
        {
          "name": "Bias current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 300,
          "max": 450,
          "conditions": "IO=0A, Vo=5.4V, Vcc=Vo+5V, Ta=25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "Reg.I",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "VCC=(Vo+3V)→25.0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "Reg IO",
          "kind": "electrical",
          "unit": "%",
          "min": -1.5,
          "typ": 0.5,
          "max": 1.5,
          "conditions": "IO=0→0.1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum dropout voltage",
          "symbol": "VCO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": 3,
          "conditions": "IO=0.1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 5.4,
          "max": null,
          "conditions": "IO=0A; limits Vo×0.99 to Vo×1.01 (±1%)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power supply voltage",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 30,
          "conditions": "Ta=25°C; not to exceed Pd",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "Vo",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 18,
          "conditions": "Ta=25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation SOT89-3K",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.67,
          "conditions": "Ta=25°C, 4-layer JEDEC board; derate 13.4mW/°C above 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "Ta",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -25,
          "typ": null,
          "max": 85,
          "conditions": "Ta=25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "Tjmax",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output current",
          "symbol": "IO",
          "kind": "recommended_operating",
          "unit": "A",
          "min": 0,
          "typ": null,
          "max": 0.1,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output capacitor",
          "symbol": "COUT",
          "kind": "recommended_operating",
          "unit": "μF",
          "min": 0.3,
          "typ": 1,
          "max": null,
          "conditions": "Ceramic capacitor recommended; min must be met over temperature, DC bias",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-ambient",
          "symbol": "θj-a",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 74.8,
          "max": null,
          "conditions": "SOT89-3K, JEDEC 4-layer PCB 114.3mm×76.2mm×1.6mm",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "TSD ON temperature",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 173,
          "max": null,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "TSD hysteresis temperature",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 8,
          "max": null,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        }
      ]
    }
  },
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  "sections": [
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  "discovery_triggers": [
    "bd54fa1fp3-ztl"
  ],
  "discovery_pitch": "BD54FA1FP3-ZTL (ROHM Semicon) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "visibility": {
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}