main
Ray Publish 0.2.1 dc88492
{
  "slug": "ld1117ag-33-aa3-a-r",
  "version": "0.2.1",
  "type": "component",
  "description": "UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
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  "dependencies": {},
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    "path": "docs/hero.png"
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    "ld1117ag-33-aa3-a-r-hero.overlay.json"
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  "metadata": {
    "specs": {
      "Manufacturer": "UTC Unisonic Tech",
      "Package": "SOT-223-4",
      "Category": "PMIC",
      "Pins": "4"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "rows": [
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 18,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Input voltage",
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          "kind": "recommended_operating",
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          "typ": null,
          "max": 15,
          "conditions": "",
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  },
  "component": {
    "mpn": "LD1117AG-33-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": "docs/ld1117ag-33-aa3-a-r-datasheet.pdf",
    "parts": {
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    "distributor_links": {
      "lcsc": "C71121"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / reference return. For the fixed 3.3V version this pin is the device ground reference. Per Pin Assignment code 'A' (AA3 = SOT-223): pin 1 = G (GND/ADJ)."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output. Fixed 3.3V nominal, up to 1A (LD1117A variant). Requires an output capacitor for stability; MLCC supported. Also connected internally to the SOT-223 tab (pin 4)."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input supply. Absolute maximum 18V, recommended operating input voltage 15V max. Dropout typically 1.15V at 500mA, 1.20V at 1A."
      },
      {
        "number": "4",
        "name": "VOUT",
        "type": "power_out",
        "description": "SOT-223 thermal tab, internally connected to VOUT (pin 2). Solder to a copper pour on the PCB to improve thermal dissipation (θJA = 165 °C/W in SOT-223)."
      }
    ],
    "provenance": {
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        "sha256": "f7f26a117cb07dc2",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
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        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "pin1": {
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      "at": [
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      "corner": "top-left",
      "source": "silk-marker",
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-07",
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      },
      {
        "file": "ld1117ag-33-aa3-a-r-etched.step",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "title": "LD1117AG-33-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.",
  "discovery_triggers": [
    "ld1117ag-33-aa3-a-r"
  ],
  "discovery_pitch": "LD1117AG-33-AA3-A-R (UTC Unisonic Tech) component page with datasheet-verified CAD.",
  "visibility": "public"
}