AMS1117CD-3.3

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  "title": "AMS1117CD-3.3",
  "brief": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "package": "TO-252-2",
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    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2108131830_UMW-Youtai-Semiconductor-Co---Ltd--AMS1117CD-3-3_C347249.pdf",
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    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / reference return for the regulator. On fixed-output versions (including the -3.3 variant) this pin is the device ground; the datasheet labels it GND/ADJ because the same pinout serves as ADJ on the adjustable version."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 3.3V output pin (typ. 3.234V-3.366V at IOUT=10mA, VIN=5V). Requires an output capacitor (22µF tantalum recommended) for stability. Rated for up to 1A continuous load, limited by thermal dissipation."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input supply (absolute max 18V; recommended operating input 12V). Should be bypassed with a 10µF capacitor close to the pin. Must be at least VOUT + VDROP (~1.2V @ 1A) above the target 3.3V output."
      }
    ],
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        "described": 3,
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        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
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      },
      {
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        "sha256": "fb52198d0388baf9a56e75e4177512eaa68ee26e29fda894107adf30150294da",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Unknown",
      "Package": "TO-252-2",
      "Category": "PMIC",
      "Pins": "3"
    }
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  "author": {
    "name": "Ray"
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  "variants": [
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      "mpn": "AMS1117CD-3.3",
      "kind": "packaging"
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    {
      "mpn": "AMS1117CD-3.3-1.2",
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    {
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    {
      "mpn": "AMS1117CD-3.3-1.8",
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    {
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  "updated_at": "2026-09-24T16:23:30.967Z"
}