AMS1117-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "ams1117-3v3",
  "title": "AMS1117-3.3",
  "brief": "AMS 1 A low-dropout fixed 3.3 V regulator, SOT-223. 1.3 V dropout at 0.8 A, internal current + thermal limit. Datasheet-verified.",
  "version": "0.1.1",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "voltage-regulator",
    "ldo",
    "3v3",
    "sot-223",
    "power"
  ],
  "component": {
    "mpn": "AMS1117-3.3",
    "manufacturer": "Advanced Monolithic Systems",
    "package": "SOT-223",
    "pin_count": 3,
    "category": "Power Management",
    "subcategory": "1 A LDO regulator (fixed 3.3 V)",
    "datasheet": "http://www.advanced-monolithic.com/pdf/ds1117.pdf",
    "parts": {
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      "footprint": "ams1117-3v3.kicad_mod",
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      "model_3d_plain": "ams1117-3v3.glb",
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      "model_3d_step_plain": "ams1117-3v3.step"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the fixed-voltage regulator. Also serves as the negative-side sense point; the top of the internal output divider (R1) is Kelvin-connected to the output tab internally."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 3.3V output; 3.251-3.349 V at TJ=25C, VIN=4.8V. Rated 1A continuous with maximum 1.3V dropout at 0.8A. Requires a 22uF solid tantalum output capacitor for loop stability. Internally shared with the SOT-223 tab (pin 4)."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input supply. Absolute maximum 15V. Requires (VIN - VOUT) >= 1.1-1.3V dropout at up to 0.8A to remain in regulation; recommended VIN = 4.75V for the 3.3V version."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "http://www.advanced-monolithic.com/pdf/ds1117.pdf",
        "pages": 8,
        "sha256": "189a2651878a87d5",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          6.5,
          1.7
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "548037233be20e3450ef75494d55613bb6603210b6d019599f2cd9250c5cb47f",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Fixed LDO linear regulator",
      "Output voltage": "3.3 V (1.5% tol)",
      "Output current": "up to 1 A",
      "Dropout": "1.3 V max at 0.8 A",
      "Protection": "Current limit + thermal shutdown",
      "Output cap": "10 µF (stability)",
      "Package": "SOT-223 (tab = VOUT)",
      "Line regulation": "typ. 0.2%"
    }
  },
  "sections": [
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    "readme",
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  "discovery_pitch": "AMS1117-3.3 1 A fixed 3.3 V low-dropout regulator (SOT-223) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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  "variants": [
    {
      "mpn": "AMS1117-3.3 (SOT-223)",
      "kind": "different-part"
    },
    {
      "mpn": "AMS1117-3.3/TR (SOT-223, tape & reel)",
      "kind": "different-part"
    }
  ]
}