AMS1117-ADJS

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  "type": "component",
  "slug": "ams1117-adjs",
  "title": "AMS1117-ADJS",
  "brief": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.1",
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  "component": {
    "mpn": "AMS1117-ADJS",
    "manufacturer": "UMW",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2311091738_UMW-Youtai-Semiconductor-Co---Ltd--AMS1117-ADJS_C3014296.pdf",
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      "lbr": "ams1117-adjs.lbr"
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    "distributor_links": {
      "lcsc": "C3014296"
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJ",
        "type": "input",
        "description": "Adjust pin for the adjustable version. Connects to the R1/R2 feedback divider that sets VOUT = VREF x (1 + R2/R1) + IADJ x R2, where VREF = 1.25V typ and IADJ = 60uA typ (120uA max). On fixed-voltage variants of the AMS1117 this same pin is the GND return; on the -ADJ variant it is the adjust input."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output. Delivers up to 1A. Requires a stable output capacitor (22uF tantalum recommended) for loop stability."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply. Absolute maximum 18V; recommended operating maximum 12V. A 10uF input capacitor is recommended for the typical application."
      }
    ],
    "provenance": {
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        "pages": 13,
        "sha256": "5ec219092aa45bd9",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.95,
        -1.5
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-89-3@sha256:0b8db9f4a8f2547a",
      "mark": "drawn"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ams1117-adjs-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "extents_mm": [
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        "zmin_mm": 0,
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        "sha256": "03ad3b81a47727c472d2d8fdd5953e28c929d90c26d51e6d406c2546b2be57ba",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "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": 3,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "sections": [
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  "discovery_triggers": [
    "ams1117-adjs"
  ],
  "discovery_pitch": "AMS1117-ADJS (UMW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "ams1117-adjs.kicad_sym",
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    "ams1117-adjs.step",
    "ams1117-adjs-etched.step",
    "ams1117-adjs.lbr",
    "docs/hero.png",
    "docs/ams1117-adjs-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pads.json",
    "ams1117-adjs-etched.glb"
  ],
  "visibility": "public",
  "updated_at": "2026-09-24T16:22:58.634Z",
  "description": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}