LD1117AG-AD-TN3-A-R

{
  "schema_version": 1,
  "type": "component",
  "slug": "ld1117ag-ad-tn3-a-r",
  "title": "LD1117AG-AD-TN3-A-R",
  "brief": "UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "ld1117ag-ad-tn3-a-r"
  ],
  "component": {
    "mpn": "LD1117AG-AD-TN3-A-R",
    "manufacturer": "UTC Unisonic Tech",
    "package": "TO-252-2(DPAK)",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8df78a8eb2f8d095670f5827599b77fe.pdf",
    "parts": {
      "symbol": "ld1117ag-ad-tn3-a-r.kicad_sym",
      "footprint": "ld1117ag-ad-tn3-a-r.kicad_mod",
      "model_3d": "ld1117ag-ad-tn3-a-r-etched.glb",
      "model_3d_plain": "ld1117ag-ad-tn3-a-r.glb",
      "model_3d_step": "ld1117ag-ad-tn3-a-r-etched.step",
      "model_3d_step_plain": "ld1117ag-ad-tn3-a-r.step",
      "lbr": "ld1117ag-ad-tn3-a-r.lbr"
    },
    "distributor_links": {
      "lcsc": "C71126"
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJ",
        "type": "input",
        "description": "Adjust pin for the adjustable output version. Feedback node held at VREF=1.25V (typ) relative to VOUT; connect a resistor divider from VOUT to ADJ to GND to program the output voltage. On fixed-voltage variants this pin functions as GND."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated positive output. Delivers up to 1A (LD1117A) with output noise ~100µV (10Hz-10kHz) and SVR ~75dB. Requires an output capacitor for stability; supports MLCC. Also the package tab: exposed metal tab of TO-252, internally tied to VOUT. Used for heat dissipation to the PCB copper pour; θJC ≈ 12 °C/W."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated positive input supply. Recommended operating input up to 15V, absolute maximum 18V. Requires VIN ≥ VOUT + dropout (≈1.2V at 800mA, 1.3V at 1A)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/8df78a8eb2f8d095670f5827599b77fe.pdf",
        "pages": 15,
        "sha256": "f7f26a117cb07dc2",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -5.04,
        -2.28
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TO-252-2@sha256:18c28e5e147d5e9b",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ld1117ag-ad-tn3-a-r.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ld1117ag-ad-tn3-a-r-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "13d88d7a4db1e8f9d794968010fbea68d80c84da987ce0bd9a26bfbde0edb0d5",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC Unisonic Tech",
      "Package": "TO-252-2(DPAK)",
      "Category": "PMIC",
      "Pins": "4"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ld1117ag-ad-tn3-a-r"
  ],
  "discovery_pitch": "LD1117AG-AD-TN3-A-R (UTC Unisonic Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ld1117ag-ad-tn3-a-r.kicad_sym",
    "ld1117ag-ad-tn3-a-r.kicad_mod",
    "ld1117ag-ad-tn3-a-r.glb",
    "ld1117ag-ad-tn3-a-r.step",
    "ld1117ag-ad-tn3-a-r-etched.step",
    "ld1117ag-ad-tn3-a-r.lbr",
    "docs/hero.png",
    "docs/ld1117ag-ad-tn3-a-r-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LD1117AG-AD-TN3-A-R",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RAA3",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RAB3",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RTA3",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RTF3",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RTND",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RT2Q",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RTQ2",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RTQ3",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AG-AD-TN3-A-RS08",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T23:46:16.808Z"
}