LM1084IT-ADJ

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm1084it-adj",
  "title": "LM1084IT-ADJ",
  "brief": "HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220-3L. 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)",
    "lm1084it-adj",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM1084IT-ADJ",
    "manufacturer": "HGSEMI",
    "package": "TO-220-3L",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8754759290387750912",
    "parts": {
      "symbol": "lm1084it-adj.kicad_sym",
      "footprint": "lm1084it-adj.kicad_mod",
      "model_3d": "lm1084it-adj-hero.glb",
      "model_3d_plain": "lm1084it-adj-etched.glb",
      "model_3d_step": "lm1084it-adj-etched.step",
      "model_3d_step_plain": "lm1084it-adj.step",
      "lbr": "lm1084it-adj.lbr"
    },
    "distributor_links": {
      "lcsc": "C259974",
      "mouser": "926-LM1084IT-ADJ"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T09:07:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": "926-LM1084IT-ADJ",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND/ADJ",
        "type": "power_in",
        "description": "Ground/adjust pin; in the adjustable (-ADJ) version it sets the output via VOUT = VREF×(1+R2/R1) + IADJ×R2, with IADJ typically 55 µA and at most 120 µA."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output voltage; a tantalum output capacitor of at least 22 µF is required for stability, and stability decreases as output current increases."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage; the absolute maximum is 20 V and the recommended input voltage is 12 V, with the dropout about 1.5 V at 5 A."
      }
    ],
    "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 labels pin 1 as 'GND/ADJ' with I/O class 'G/O', which is not a standard KiCad class. I; The pinout diagram (管脚排列图) on page 5 is an image and did not come through in the text, so the physic; The datasheet pin table is shared by all LM1084 variants and does not single out the IT-ADJ part; th"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0448,
        "at": "2026-10-19T09:04:52"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8754759290387750912",
        "pages": 11,
        "sha256": "8ced581695e85829",
        "source_tier": "lcsc"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "lm1084it-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": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm1084it-adj-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
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        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7574dde648948c7c737a44c63b006450007b6e111b2011fb262998173478f476",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "TO-220-3L",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8ced581695e8582914ee5b212e1bd3f3148e084a062addeedc60e5e2da1a6f9d",
      "rows": [
        {
          "name": "Reference voltage (IOUT=10mA, VIN-VOUT=3V)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1.231,
          "typ": 1.25,
          "max": 1.269,
          "conditions": "IOUT=10mA, VIN-VOUT=3V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage (10mA≤IOUT≤5A)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1.225,
          "typ": 1.25,
          "max": 1.275,
          "conditions": "10mA≤IOUT≤5A, 1.5V≤VIN-VOUT≤5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line regulation (ADJ)",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.015,
          "max": 0.2,
          "conditions": "IOUT=10mA, 2.85V≤VIN≤10V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load regulation (ADJ)",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.1,
          "max": 0.4,
          "conditions": "0mA≤IOUT≤5A, VIN-VOUT=3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.45,
          "max": 1.5,
          "conditions": "IOUT=5A, ΔVREF, ΔVOUT=1%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current limit",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 5.5,
          "max": 6.5,
          "conditions": "VIN-VOUT=3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum load current (ADJ)",
          "symbol": "ILOAD(MIN)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3,
          "max": 10,
          "conditions": "VIN=10V (LM1084-ADJ)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "VIN=10V (LM1084)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ripple rejection",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 72,
          "max": null,
          "conditions": "fRIPPLE=120Hz, COUT=25μF tantalum, IOUT=5A, VIN-VOUT=3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Adjust pin current",
          "symbol": "IADJ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 55,
          "max": 120,
          "conditions": "VIN=4.25V, IOUT=10mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Adjust pin current change",
          "symbol": "ΔIADJ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.2,
          "max": 5,
          "conditions": "10mA≤IOUT≤5A, 1.5V≤(VIN-VOUT)≤4.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (recommended)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range (recommended, TO220/TO-263)",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "TO220/TO-263 package",
          "source_page": 3,
          "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)",
          "symbol": "TLEAD",
          "kind": "absolute_maximum",
          "unit": "℃",
          "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": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD capability (minimum)",
          "symbol": "ESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 2000,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Temperature stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "IOUT=10mA, VIN-VOUT=1.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Long-term stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "Tamb=125°C, 1000Hrs",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RMS noise (% of VOUT)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.003,
          "max": null,
          "conditions": "10Hz≤f≤10kHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-to-ambient (TO-220-3L)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "TO-220-3L",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "lm1084it-adj"
  ],
  "discovery_pitch": "LM1084IT-ADJ (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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}