main
Ray Set visibility: public 629ce21 1d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lm337t",
  "title": "LM337T",
  "brief": "Texas Instruments 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": [
    "component",
    "power management (pmic)",
    "lm337t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM337T",
    "manufacturer": "Texas Instruments",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm337.pdf",
    "parts": {
      "symbol": "lm337t.kicad_sym",
      "footprint": "lm337t.kicad_mod",
      "model_3d": "lm337t-hero.glb",
      "model_3d_plain": "lm337t-etched.glb",
      "model_3d_step": "lm337t-etched.step",
      "model_3d_step_plain": "lm337t.step",
      "lbr": "lm337t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2869423",
      "digikey": "LM337TFS-ND",
      "mouser": "512-LM337T"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T21:27:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM337TFS-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "512-LM337T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJUSTMENT",
        "type": "passive",
        "description": "Adjustment pin for the output voltage; connect two external resistors to adjust the output voltage."
      },
      {
        "number": "2",
        "name": "INPUT",
        "type": "power_in",
        "description": "Input voltage; the input voltage and current are designated VI and II, with the input-to-output differential limited to -40 V maximum."
      },
      {
        "number": "3",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Output voltage; the output voltage and current are designated VO and IO, with output current up to 1.5 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 MPN LM337T is not named in this datasheet, which lists LM337KCS/KC in the TO-220 package. Pinout"
        ],
        "pages_sent": 25,
        "cost_usd": 0.0225,
        "at": "2026-11-05T21:26:52"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm337.pdf",
        "pages": 25,
        "sha256": "9314cd867e85589c",
        "source_tier": "mfr"
      },
      "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": "lm337t.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": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm337t-etched.step",
        "role": "eda",
        "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": "52d9f9c604d97035fd63cdde46244f175a451594b9be4ce52bd608cd712dd506",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TO-220",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "9314cd867e85589c17f6a6007396863f2dd2e7622d8e480570d119b09632a4db",
      "rows": [
        {
          "name": "Reference voltage (OUTPUT to ADJUSTMENT)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": -1.213,
          "typ": -1.25,
          "max": -1.287,
          "conditions": "VI – VO = –3 V to –40 V, TJ = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage (OUTPUT to ADJUSTMENT)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": -1.2,
          "typ": -1.25,
          "max": -1.3,
          "conditions": "VI – VO = –3 V to –40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation, TJ = MIN to MAX",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ripple rejection",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": 66,
          "typ": 77,
          "max": null,
          "conditions": "VO = –10 V, f = 120 Hz, CADJ = 10 μF",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.01,
          "max": 0.04,
          "conditions": "TJ = 25°C, VI – VO = –3 V to –40 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.02,
          "max": 0.07,
          "conditions": "TJ = MIN to MAX, VI – VO = –3 V to –40 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 50,
          "max": 70,
          "conditions": "|VO| ≤ 5 V, IO = 10 mA to 1.5 A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 1,
          "max": 1.5,
          "conditions": "|VO| ≥ 5 V, IO = 10 mA to 1.5 A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output-voltage long-term drift",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.3,
          "max": 1,
          "conditions": "After 1000 h at TJ = MAX and VI – VO = –40 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Minimum output current to maintain regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.5,
          "max": 6,
          "conditions": "|VI – VO| ≤ 10 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Peak output current",
          "symbol": "",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.5,
          "max": 2.2,
          "conditions": "|VI – VO| ≤ 15 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Peak output current",
          "symbol": "",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 0.15,
          "max": 0.4,
          "conditions": "|VI – VO| ≤ 40 V, TJ = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ADJUSTMENT current",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 65,
          "max": 100,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Change in ADJUSTMENT current",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 2,
          "max": 5,
          "conditions": "VI – VO = –2.5 V to –40 V, IO = 10 mA to MAX, TJ = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/W",
          "min": null,
          "typ": 0.003,
          "max": 0.04,
          "conditions": "Initial TJ = 25°C, 10-ms pulse",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output-voltage change with temperature",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.6,
          "max": null,
          "conditions": "TJ = MIN to MAX",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output noise voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.003,
          "max": null,
          "conditions": "f = 10 Hz to 10 kHz, TJ = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ripple rejection",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "VO = –10 V, f = 120 Hz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input-to-output differential voltage",
          "symbol": "VI – VO",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -2.5,
          "typ": null,
          "max": -37,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output current",
          "symbol": "IO",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 10,
          "typ": null,
          "max": 1500,
          "conditions": "|VI – VO| ≤ 40 V, P ≤ 15 W",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output current",
          "symbol": "IO",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 6,
          "typ": null,
          "max": 1500,
          "conditions": "|VI – VO| ≤ 10 V, P ≤ 15 W",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating virtual junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 125,
          "conditions": "LM337",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input-to-output differential voltage",
          "symbol": "VI – VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating virtual junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "1.6 mm (1/16 in) from case for 10 s",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 24.8,
          "max": null,
          "conditions": "KC and KCS (TO-220) packages",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case (top) thermal resistance",
          "symbol": "RθJC(top)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "KC and KCS (TO-220) packages",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm337t"
  ],
  "discovery_pitch": "LM337T (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm337t.kicad_sym",
    "lm337t.kicad_mod",
    "lm337t.glb",
    "lm337t.step",
    "lm337t.lbr",
    "docs/hero.png",
    "docs/lm337t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm337t-hero.glb",
    "lm337t-hero.overlay.json",
    "lm337t-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}