main
Ray Set visibility: public 8d34d64 16d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "um1550y-36",
  "title": "UM1550Y-36",
  "brief": "Union Semiconductor Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, 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": [
    "component",
    "power management (pmic)",
    "um1550y-36",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UM1550Y-36",
    "manufacturer": "Union Semiconductor",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603085522311540736",
    "parts": {
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      "footprint": "um1550y-36.kicad_mod",
      "model_3d": "um1550y-36-hero.glb",
      "model_3d_plain": "um1550y-36-etched.glb",
      "model_3d_step": "um1550y-36-etched.step",
      "model_3d_step_plain": "um1550y-36.step",
      "lbr": "um1550y-36.lbr"
    },
    "distributor_links": {
      "lcsc": "C7542876",
      "digikey": "3351-UM1550Y-36TR-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T10:10:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "3351-UM1550Y-36TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input; input voltage range 1.8V to 8V (absolute maximum -0.3 to +10V)."
      },
      {
        "number": "3",
        "name": "VOUT",
        "type": "power_out",
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      }
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      "factory_chain": {
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        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The UM1550Y SOT89-3 drawing shows an unnumbered metal tab connected to VIN (same net as pin 2). I di; The datasheet gives the pin-function table (page 4) only by name. The pin-to-number assignment (1=GN",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 24,
        "cost_usd": 0.4597,
        "at": "2026-10-19T10:06:46"
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        "pages": 24,
        "sha256": "dbe4313ebf61b9cd",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "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": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-19",
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        "sha256": "a734e6dec95d4b4dc3973e0fa58ea8fee16da5dca2d351bfd8054799ef6963ab",
        "checked": "2026-10-19",
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      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Union Semiconductor",
      "Package": "SOT-89-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "dbe4313ebf61b9cd401bd3d228e08e73ab34c6b73650b432182765f229641dd3",
      "rows": [
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          "name": "Supply Voltage on VIN Pin",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on VOUT Pin",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 10,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Note 2, 3",
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          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature for Soldering",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 Seconds",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation, SOT89-3",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
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          "max": 1,
          "conditions": "@25°C (Note 4)",
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        },
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          "kind": "electrical",
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          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Range (family range, 1.2V to 5.0V options)",
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          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": null,
          "max": 5,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Operating Quiescent Current",
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          "kind": "electrical",
          "unit": "μA",
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          "typ": 2.5,
          "max": 3.5,
          "conditions": "VIN=8V, IOUT=0mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Shut Down Quiescent Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VIN=8V, SHDN=GND",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input Current (SHDN)",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "SHDN=VIN or GND",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 300,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Accuracy",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -2.5,
          "typ": null,
          "max": 2.5,
          "conditions": "1mA≤IOUT≤250mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "ΔVDO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 250,
          "max": 330,
          "conditions": "IOUT=200mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Current Limit",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "mA",
          "min": 350,
          "typ": 450,
          "max": 550,
          "conditions": "RL=1Ω",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input Low Voltage (SHDN)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VIN=1.8V to 8V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input High Voltage (SHDN)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": null,
          "max": null,
          "conditions": "VIN=1.8V to 8V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage TC",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": null,
          "max": 60,
          "conditions": "-40°C to +125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VOUT+0.3V≤VIN≤8.0V or VIN>1.8V, IOUT=10mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "VIN=VOUT+1V or VIN>1.8V, 1mA≤IOUT≤250mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Thermal Resistance, package as printed SOT89-5 (see review)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Startup Time Response",
          "symbol": "t",
          "kind": "timing",
          "unit": "μs",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "VOUT=3.3V, RL=68Ω, COUT=1μF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Noise",
          "symbol": "",
          "kind": "electrical",
          "unit": "μVRMS",
          "min": null,
          "typ": 115,
          "max": null,
          "conditions": "VOUT=3.0V, f=10Hz to 100kHz, CIN=1μF, IOUT=100mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Ripple Rejection at 100Hz",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 56,
          "max": null,
          "conditions": "VIN=VOUT+1V, IOUT=100mA, f=100Hz",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Ripple Rejection at 1kHz",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 42,
          "max": null,
          "conditions": "VIN=VOUT+1V, IOUT=100mA, f=1kHz",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "ESD Rating, Human Body Mode",
          "symbol": "",
          "kind": "electrical",
          "unit": "kV",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "UM1550Y-36 (Union Semiconductor) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}