LM1117T-ADJ

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm1117t-adj",
  "title": "LM1117T-ADJ",
  "brief": "HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. 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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    "power management (pmic)",
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    "factory-2.0.0",
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  "component": {
    "mpn": "LM1117T-ADJ",
    "manufacturer": "HGSEMI",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8609178889696927744",
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    "distributor_links": {
      "lcsc": "C498319"
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    "distributor_check": {
      "checked_at": "2026-10-18T09:49:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND/ADJ",
        "type": "power_in",
        "description": "Ground/adjust pin (地/ADJ) that sets the adjustable output voltage; the datasheet gives the adjust pin current as 60 µA typical and 120 µA maximum."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output voltage pin (输出电压); the datasheet specifies a minimum 22 µF tantalum output capacitor for the adjustable version to ensure stability."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin (输入工作电压) for the regulator, with a 1.4 V minimum input-to-output headroom for the adjustable version and a 20 V absolute maximum input voltage."
      }
    ],
    "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's TO-220 pinout table (page 5) lists only pins 1-3. The metal tab is stated as 'TAB IS; Pin 1 is a combined GND/ADJ pin with I/O marked '--/O' in the datasheet. It is classified as power_i; Pin 3 description cites the 1.4 V headroom (page 4) and 20 V absolute maximum (page 3), which are no"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0378,
        "at": "2026-10-18T09:48:03"
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        "pages": 12,
        "sha256": "2486968a9dcfb2fd",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "viewers": {
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      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "file": "lm1117t-adj.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
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        "sha256": "b44a1917b6a7a5da3227aa226202de50bb1bac8c63372fe9499ca08057c70ccb",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "TO-220",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2486968a9dcfb2fdc76817b34d8b98c4cc2372155a97a29ebf33b06d72dfc9a6",
      "rows": [
        {
          "name": "Reference voltage (25°C)",
          "symbol": "VREF",
          "kind": "tolerance",
          "unit": "V",
          "min": 1.238,
          "typ": 1.25,
          "max": 1.262,
          "conditions": "LM1117-ADJ, IOUT=10mA, VIN-VOUT=2V, TJ=25℃",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage (over temperature)",
          "symbol": "VREF",
          "kind": "tolerance",
          "unit": "V",
          "min": 1.225,
          "typ": 1.25,
          "max": 1.27,
          "conditions": "LM1117-ADJ, 10mA≤IOUT≤1A, 1.4V≤VIN-VOUT≤10V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "Rline",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 7,
          "conditions": "VINMIN ≤VIN≤ 12V, VOUT=Fixed/Adj, IOUT=10mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "Rload",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 6,
          "max": 12,
          "conditions": "10mA≤IOUT≤ 1A, VOUT=Fixed/Adj",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage (IOUT=100mA)",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1,
          "max": 1.2,
          "conditions": "IOUT=100mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage (IOUT=500mA)",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.05,
          "max": 1.25,
          "conditions": "IOUT=500mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage (IOUT=1A)",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.1,
          "max": 1.3,
          "conditions": "IOUT=1A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "Iq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "4.25V≤VIN≤ 6.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ripple rejection ratio",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 75,
          "max": null,
          "conditions": "fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Adjust pin current",
          "symbol": "Iadj",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 60,
          "max": 120,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Adjust pin current change",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.2,
          "max": 5,
          "conditions": "0≤IOUT≤1A, 1.4V ≤VIN-VOUT≤10V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current limit",
          "symbol": "Ilimit",
          "kind": "electrical",
          "unit": "A",
          "min": 1.2,
          "typ": 1.4,
          "max": 1.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Recommended input voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Recommended operating junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature (soldering 10 s)",
          "symbol": "TLEAD",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 245,
          "conditions": "TO-263/TO-220, soldering 10 s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range (absolute maximum)",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD capability",
          "symbol": "ESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 2000,
          "typ": null,
          "max": null,
          "conditions": "minimum value as printed",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient (no heatsink)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "TO-220-3, no heatsink",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "LM1117T-ADJ (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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