LM1117-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm1117",
  "title": "LM1117-3.3",
  "brief": "TI 800 mA low-dropout regulator, SOT-223. Fixed 3.3 V, 1.2 V dropout, current limit + thermal. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "voltage-regulator",
    "ldo",
    "3v3",
    "sot-223",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LM1117",
    "manufacturer": "Texas Instruments",
    "package": "SOT-223",
    "pin_count": 4,
    "category": "Power Management",
    "subcategory": "800 mA LDO regulator (fixed 3.3 V)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm1117.pdf",
    "parts": {
      "symbol": "lm1117.kicad_sym",
      "footprint": "lm1117.kicad_mod",
      "model_3d": "lm1117-etched.glb",
      "model_3d_plain": "lm1117.glb",
      "lbr": "lm1117.lbr",
      "model_3d_step": "lm1117-etched.step",
      "model_3d_step_plain": "lm1117.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "ADJ/GND",
        "type": "input",
        "description": "Adjust pin for the adjustable (LM1117-ADJ) option: connects to the top of an external resistor divider from VOUT to set VOUT = 1.25 V x (1 + R2/R1); adjust-pin current is 60 uA typical (120 uA max over temperature). For fixed-voltage options this pin is ground (0 V reference)."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output voltage pin, up to 800 mA of load current. Requires a minimum 10-uF tantalum capacitor to GND for output stability and transient response. Electrically the same net as pin 4 and the tab."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input voltage pin, recommended operating range up to 15 V (absolute max 20 V to GND). Must be at least VOUT + 1.2 V (dropout at 800 mA) for the regulator to remain in regulation. Bypass with an input capacitor close to the pin."
      },
      {
        "number": "4",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output voltage pin (same net as pin 2 and the SOT-223 tab). Included on the SOT-223 (DCY) package as a second output lead to help distribute the 800 mA output current."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm1117.pdf",
        "pages": 46,
        "sha256": "35892f3a8673fae9",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm1117-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          6.5,
          1.7
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "12b0fe426581b922f8bb69763c214ec0b2d43370851139d1cea9396cdfc24dd2",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Fixed LDO linear regulator",
      "Output voltage": "3.3 V (fixed)",
      "Output current": "800 mA",
      "Dropout": "1.2 V max at 800 mA",
      "Protection": "current limit + thermal shutdown",
      "Output cap": "10 µF (stability)",
      "Pinout": "1=GND, 2=VOUT (tab), 3=VIN",
      "Package": "SOT-223"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm1117",
    "lm1117-3.3",
    "800ma ldo",
    "3.3v regulator",
    "sot-223 ldo"
  ],
  "discovery_pitch": "LM1117-3.3 800 mA fixed 3.3 V low-dropout regulator (SOT-223) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm1117.kicad_sym",
    "lm1117.kicad_mod",
    "lm1117.glb",
    "lm1117.lbr",
    "docs/hero.png",
    "docs/lm1117-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm1117-etched.step"
  ],
  "variants": [
    {
      "mpn": "LM1117MP-3.3 (SOT-223)",
      "kind": "unknown"
    },
    {
      "mpn": "LM1117MPX-3.3 (SOT-223, tape & reel)",
      "kind": "unknown"
    }
  ]
}