main
Ray Set visibility: public 383394a 15h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "ld1117ag-50-tn3-a-r",
  "title": "LD1117AG-50-TN3-A-R",
  "brief": "UTC(Unisonic Tech) Linear Voltage Regulators (LDO), TO-252-2(DPAK). 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": "LD1117AG-50-TN3-A-R",
    "manufacturer": "UTC(Unisonic Tech)",
    "package": "TO-252-2(DPAK)",
    "pin_count": 3,
    "category": "Power Management ICs",
    "subcategory": "Linear Voltage Regulators (LDO)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8df78a8eb2f8d095670f5827599b77fe.pdf",
    "parts": {
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    "distributor_links": {
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
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        "status": "quota"
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      "mouser": {
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        "status": "quota"
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    "pins": [
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        "number": "1",
        "name": "GND/ADJ",
        "type": "power_in",
        "description": "Ground reference pin (GND/ADJ pin, used as GND on this fixed 5.0V version) per pin code A; the datasheet shows it as the common reference for the 1.25V VREF on adjustable versions."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output of 5.0V (4.900 to 5.100V at 25°C) with output current up to 1A for the LD1117A, with current limit and over-temperature protection."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input voltage, recommended 15V maximum operating and 18V absolute maximum."
      }
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    "provenance": {
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      "factory_chain": {
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        "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: Pin assignment taken from the ordering table: the MPN suffix -TN3-A selects pin code A (1=GND/ADJ, 2; The datasheet does not state what the TO-252 tab/heatsink is connected to. A tab pin is not listed. "
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        "pages_sent": 15,
        "cost_usd": 0.1224,
        "at": "2026-10-22T21:11:41"
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        "pages": 15,
        "sha256": "f7f26a117cb07dc2",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "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": [
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          2.32
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "0633131f6c943bc1e12701fb87464895e4dc90481441f0e15d143d65e637cb00",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC(Unisonic Tech)",
      "Package": "TO-252-2(DPAK)",
      "Category": "Power Management ICs",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "f7f26a117cb07dc234930c120ca6bf618d0226f892c771754c15df0b9a191b18",
      "rows": [
        {
          "name": "Output Voltage",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 4.9,
          "typ": 5,
          "max": 5.1,
          "conditions": "VIN=7V, IOUT=10mA, TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1,
          "max": 10,
          "conditions": "VIN=6.5 to 15V, IOUT=0mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1,
          "max": 15,
          "conditions": "VIN=6.5V, LD1117A: IOUT=0~1000mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "VIN15V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "mA",
          "min": 1000,
          "typ": null,
          "max": null,
          "conditions": "LD1117A, VIN=10V, TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage Rejection",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 75,
          "max": null,
          "conditions": "IOUT=40mA, f=120Hz, TJ=25°C, VIN=8V, VRIPPLE=1VPP",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": 1.1,
          "conditions": "IOUT=100mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.15,
          "max": 1.25,
          "conditions": "IOUT=500mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.2,
          "max": 1.3,
          "conditions": "IOUT=800mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Thermal Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/W",
          "min": null,
          "typ": 0.01,
          "max": 0.1,
          "conditions": "TA=25°C, 30ms Pulse",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Operating Input Voltage",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "IOUT=100mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Temperature stability",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Long Term Stability",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.3,
          "max": null,
          "conditions": "1000 hrs, TJ=125°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Output Noise Voltage",
          "symbol": "eN",
          "kind": "electrical",
          "unit": "µV",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "B=10Hz to 10KHz, TJ=25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "DC Input Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 18,
          "conditions": "TA=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "TA=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "TOPR",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -20,
          "typ": null,
          "max": 125,
          "conditions": "TA=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "TA=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
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          "kind": "recommended_operating",
          "unit": "°C",
          "min": -20,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Junction to Ambient Thermal Resistance",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 112,
          "conditions": "TO-252/TO-252D",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction to Case Thermal Resistance",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 12,
          "conditions": "TO-252/TO-252D",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "LD1117AG-50-TN3-A-R (UTC(Unisonic Tech)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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