main
Ray Set visibility: public d7a6383 8d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "um15428s",
  "title": "UM15428S",
  "brief": "Union Semiconductor Linear Voltage Regulators (LDO), 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",
    "power management ics",
    "um15428s",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UM15428S",
    "manufacturer": "Union Semiconductor",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management ICs",
    "subcategory": "Linear Voltage Regulators (LDO)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/076cc1e8855bb3b7d7c3bd7bd270acc8.pdf",
    "parts": {
      "symbol": "um15428s.kicad_sym",
      "footprint": "um15428s.kicad_mod",
      "model_3d": "um15428s-hero.glb",
      "model_3d_plain": "um15428s-etched.glb",
      "model_3d_step": "um15428s-etched.step",
      "model_3d_step_plain": "um15428s.step",
      "lbr": "um15428s.lbr"
    },
    "distributor_links": {
      "lcsc": "C510539"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T19:40:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Power supply input for the regulator, with a recommended supply range of 2.2V to 5.5V and an absolute maximum rating of -0.3V to +6.5V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the regulator."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Active-high enable input that disables the regulator when driven low; VIH is at least 1.0V, VIL is at most 0.4V, and the absolute maximum is -0.3V to +6.5V."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; the datasheet assigns no function to this pin."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated voltage output, rated for 100mA at VIN≥3V and 200mA at VIN≥3.5V, with an absolute maximum rating of -0.3V to +6.5V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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: UM15428S is the 2.8V version listed under SOT23-5 (marking 5FH) on page 4, so the UM154xxS column of; The top-view drawing on page 2 does not print pin numbers in the extracted text, so pin numbers are ; The datasheet gives no function for the NC pin beyond 'Not Connected', so its description is limited"
        ],
        "pages_sent": 17,
        "cost_usd": 0.0469,
        "at": "2026-10-30T19:40:06"
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        "pages": 17,
        "sha256": "882e5b238ca82024",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "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,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "3dff3ca2102010894b0526c59bbb508a25a3b431f98a7c2e1d63a0ab7a876bb7",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Union Semiconductor",
      "Package": "SOT-23-5",
      "Category": "Power Management ICs",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "882e5b238ca820244843724ee59881ca59917736a5af0e3125d5f372bf986769",
      "rows": [
        {
          "name": "Input Voltage Range",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 2.2,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Range",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 1.3,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1.2,
          "max": 3,
          "conditions": "IOUT=0mA,VIN=5.0V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Standby Current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "VEN=0V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Enable High Current",
          "symbol": "IENH",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VEN=5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Enable Low Current",
          "symbol": "IENL",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VEN=0V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Enable Input High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Enable Input Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "VIN≥3V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 200,
          "typ": null,
          "max": null,
          "conditions": "VIN≥3.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Accuracy",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "VIN=VOUT+1V (VIN≥3V), 1mA≤IOUT≤30mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "ΔVDO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.13,
          "conditions": "VOUT≥2.5V, IOUT=30mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": -0.5,
          "typ": 0.3,
          "max": 0.5,
          "conditions": "VOUT+1V≤VIN≤5.5V (VIN≥3V), IOUT=30mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VIN=VOUT+1V (VIN≥3V), 1mA≤IOUT≤100mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 300,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage TC",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal-Shutdown Temperature",
          "symbol": "TSHDN",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 160,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal-Shutdown Hysteresis",
          "symbol": "ΔTSHDN",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Ripple Rejection",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 55,
          "max": null,
          "conditions": "VIN=VOUT+1V, IOUT=10mA, f=10Hz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Ripple Rejection",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 45,
          "max": null,
          "conditions": "VIN=VOUT+1V, IOUT=10mA, f=100Hz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage on IN Pin",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Voltage on OUT Pin",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Voltage on EN Pin",
          "symbol": "VEN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Note 2, 3",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature for Soldering",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "10 seconds",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Supply Input Voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.2,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Range",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "UM15428S (Union Semiconductor) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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