REG1117A

{
  "schema_version": 1,
  "type": "component",
  "slug": "reg1117a",
  "title": "REG1117A",
  "brief": "Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. 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)",
    "reg1117a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "REG1117A",
    "manufacturer": "Texas Instruments",
    "package": "SOT-223-4",
    "pin_count": 4,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/reg1117a.pdf",
    "parts": {
      "symbol": "reg1117a.kicad_sym",
      "footprint": "reg1117a.kicad_mod",
      "model_3d": "reg1117a-hero.glb",
      "model_3d_plain": "reg1117a.glb",
      "model_3d_step": "reg1117a-etched.step",
      "model_3d_step_plain": "reg1117a.step",
      "lbr": "reg1117a.lbr"
    },
    "distributor_links": {
      "lcsc": "C2862453",
      "mouser": "595-REG1117A"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T09:02:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "595-REG1117A",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND/ADJ",
        "type": "power_in",
        "description": "Ground reference for fixed-voltage models; on the adjustable REG1117A this pin is the ADJ node, where R1 and R2 set the output voltage with a 1.25V reference, and adjust pin current is 50µA typ and 120µA max."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output that supplies up to 1A (REG1117A) and needs an output capacitor, with a 10µF tantalum recommended and ESR below 0.5Ω."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input supply with an absolute maximum of +15V, requiring at least about 1.3V above VOUT at 1A for regulation (REG1117A dropout 1.3V max)."
      },
      {
        "number": "4",
        "name": "TAB",
        "type": "power_out",
        "description": "Mounting tab electrically connected to VOUT, which must be soldered to adequate board copper because it provides the main heat-sinking path (JA about 59°C/W without backside copper)."
      }
    ],
    "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 connection diagram lists pins left to right as Ground, VOUT, VIN with the tab as VOU; Pin 1 is Ground in fixed-voltage models and ADJ in the adjustable model. The connection diagram text; Ordering table lists the package as SOT223-3 (DCY), while the package addendum gives 4 pins for DCY."
        ],
        "pages_sent": 23,
        "cost_usd": 0.097,
        "at": "2026-10-09T09:02:24"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/reg1117a.pdf",
        "pages": 23,
        "sha256": "9612deef2bd34399",
        "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": "reg1117a.step",
        "role": "plain",
        "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": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "reg1117a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.5,
          1.7
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "79cc4a8b1ea9ae76a745d80f21652e0565b997914431c8984c660f2bc417a803",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-223-4",
      "Category": "Power Management (PMIC)",
      "Pins": "4"
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "reg1117a"
  ],
  "discovery_pitch": "REG1117A (Texas Instruments) 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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  "files": [
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    "reg1117a.glb",
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    "reg1117a.lbr",
    "docs/hero.png",
    "docs/reg1117a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "reg1117a-hero.glb",
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  "visibility": {
    "public": true
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}