main
Ray Set visibility: public 0868cd0 9d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "um1350",
  "title": "UM1350",
  "brief": "Union Semiconductor LED Drivers, SOT-23-5. 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",
    "led drivers",
    "um1350",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UM1350",
    "manufacturer": "Union Semiconductor",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "LED Drivers",
    "subcategory": "LED Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603085516330057728",
    "parts": {
      "symbol": "um1350.kicad_sym",
      "footprint": "um1350.kicad_mod",
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      "model_3d_plain": "um1350-etched.glb",
      "model_3d_step": "um1350-etched.step",
      "model_3d_step_plain": "um1350.step",
      "lbr": "um1350.lbr"
    },
    "distributor_links": {
      "lcsc": "C7542862"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T20:40:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LX",
        "type": "output",
        "description": "Drain of the internal NDMOS switch, rated for -0.3 to +40 V on LX and a switch output current of 500 mA absolute maximum."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for the device."
      },
      {
        "number": "3",
        "name": "VSET",
        "type": "input",
        "description": "Multi-function on/off and brightness control: leave floating for nominal current, drive below 0.2 V to turn the output off, drive with 0.3 V to 2.5 V DC or a PWM signal for 12% to 100% (or 1% to 100% below 500 Hz) dimming, with an absolute maximum of -0.3 to +6 V."
      },
      {
        "number": "4",
        "name": "ISENSE",
        "type": "input",
        "description": "Connect the current sense resistor RS from this pin to VIN to set the nominal average output current (IOUTnom = 100 mV/RS), with ISENSE voltage rated +0.3 to -5 V relative to VIN."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin, operating range 6 V to 30 V, with an absolute maximum of -0.3 to +40 V."
      }
    ],
    "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",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet gives the pinout only for the SOT23-5 package, and the ordering table lists only UM135; Pin types are inferred, not printed in the datasheet: LX is classed as output because it is the drai; Pin 4 ISENSE absolute maximum is printed as '+0.3 to -5 (Note 2)' with Note 2 stating it is measured"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0579,
        "at": "2026-10-17T20:38:41"
      },
      "datasheet": {
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        "pages": 15,
        "sha256": "f28c059281820b66",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "um1350.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "um1350-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5986f5b89d9d34b3fd0cfd9c0cfc1bbd232a1acf0155851a9ccc0650d5414811",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Union Semiconductor",
      "Package": "SOT-23-5",
      "Category": "LED Drivers",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "f28c059281820b66c10e44d2ccec3482ecd45c75378dccb2e097563b08ba8cac",
      "rows": [
        {
          "name": "Input Voltage Range",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 6,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ISENSE Voltage",
          "symbol": "VSENSE",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": 0.3,
          "conditions": "Printed as +0.3 to -5; Note 2: measured with respect to VIN",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "LX Output Voltage",
          "symbol": "VLX",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Adjust Pin Input Voltage",
          "symbol": "VVSET",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Switch Output Current",
          "symbol": "ILX",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Continuous Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.89,
          "conditions": "TA=25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Mean Current Sense Threshold Voltage",
          "symbol": "VSENSE",
          "kind": "electrical",
          "unit": "mV",
          "min": 95,
          "typ": 100,
          "max": 105,
          "conditions": "VVSET=1.25V; measured on ISENSE pin with respect to VIN",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Sense Threshold Hysteresis",
          "symbol": "VSENSEHYS",
          "kind": "tolerance",
          "unit": "%",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "Printed as ±15%",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ISENSE Pin Input Current",
          "symbol": "ISENSE",
          "kind": "electrical",
          "unit": "μA",
          "min": 16,
          "typ": 20,
          "max": null,
          "conditions": "VSENSE=VIN–0.1",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Internal Reference Voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.25,
          "max": 1.3,
          "conditions": "Measured on VSET pin with pin floating",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "External Control Voltage Range on VSET Pin for DC Brightness Control",
          "symbol": "VVSET",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0.3,
          "typ": null,
          "max": 2.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Voltage on VSET Pin to Switch Device from Active (On) to Quiescent (Off) State",
          "symbol": "VVSEToff",
          "kind": "electrical",
          "unit": "V",
          "min": 0.15,
          "typ": 0.2,
          "max": 0.25,
          "conditions": "VVSET Falling",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Voltage on VSET Pin to Switch Device from Quiescent (Off) to Active (On) State",
          "symbol": "VVSETon",
          "kind": "electrical",
          "unit": "V",
          "min": 0.2,
          "typ": 0.25,
          "max": 0.3,
          "conditions": "VVSET Rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "LX Switch 'On' Resistance",
          "symbol": "RLX",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.95,
          "max": 1.8,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Continuous LX Switch Current",
          "symbol": "ILXmean",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.37,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "LX Switch Leakage Current",
          "symbol": "ILX(leak)",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current with Output Off",
          "symbol": "IINQoff",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "VSET pin grounded",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current with Output Switching",
          "symbol": "IINQon",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 220,
          "max": null,
          "conditions": "VSET pin floating; f=250kHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Internal Regulator Start-up Threshold",
          "symbol": "VSU",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 4.5,
          "max": null,
          "conditions": "VIN rising",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "um1350"
  ],
  "discovery_pitch": "UM1350 (Union Semiconductor) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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  }
}