LD1117AG-12-AA3-A-R

{
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  "type": "component",
  "slug": "ld1117ag-12-aa3-a-r",
  "title": "LD1117AG-12-AA3-A-R",
  "brief": "UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "LD1117AG-12-AA3-A-R",
    "manufacturer": "UTC Unisonic Tech",
    "package": "SOT-223-4",
    "pin_count": 4,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8df78a8eb2f8d095670f5827599b77fe.pdf",
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      "lbr": "ld1117ag-12-aa3-a-r.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for the regulator. In fixed-output variants this pin is tied directly to system ground and carries the quiescent current (~5 mA typ, 10 mA max). Pin assignment 'A' places GND on pin 1 of the SOT-223."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated positive output, 1.2 V nominal (1.176-1.224 V) at up to 1 A for the A-suffix part. Requires an output capacitor (MLCC supported) for stability. This pin is electrically common to the SOT-223 tab."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated positive input, recommended up to 15 V (absolute max 18 V). Dropout voltage is ~1.20 V at 1 A, so VIN must exceed VOUT by at least the dropout across the load range."
      },
      {
        "number": "TAB",
        "name": "VOUT",
        "type": "power_out",
        "description": "Thermal tab on the SOT-223, electrically connected to VOUT (pin 2). Solder to a copper pour for heat dissipation (θJC = 15 °C/W, θJA = 165 °C/W)."
      }
    ],
    "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
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      "footprint": "viewers/footprint.html"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC Unisonic Tech",
      "Package": "SOT-223-4",
      "Category": "PMIC",
      "Pins": "4"
    }
  },
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      "mpn": "LD1117AG-12-AA3-A-RTN3",
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    {
      "mpn": "LD1117AG-12-AA3-A-RTND",
      "kind": "packaging"
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    {
      "mpn": "LD1117AG-12-AA3-A-RTQ2",
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    {
      "mpn": "LD1117AG-12-AA3-A-RTQ3",
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      "mpn": "LD1117AG-12-AA3-A-RS08",
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  "discovery_pitch": "LD1117AG-12-AA3-A-R (UTC Unisonic Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-24T23:45:20.041Z"
}