AMS1117-2.5V

{
  "schema_version": 1,
  "type": "component",
  "slug": "ams1117-2-5v",
  "title": "AMS1117-2.5V",
  "brief": "MSKSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
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  "component": {
    "mpn": "AMS1117-2.5V",
    "manufacturer": "MSKSEMI",
    "package": "SOT-223",
    "pin_count": 4,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2309221048_MSKSEMI-AMS1117-2-5V_C5240656.pdf",
    "parts": {
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      "lbr": "ams1117-2-5v.lbr"
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    "distributor_links": {
      "lcsc": "C5240656"
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    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / VSS reference pin. On the fixed 2.5 V version this pin is the device ground return (the datasheet labels the pin 'VSS/ADJ' because the same silicon is used for the adjustable variant, where it becomes the ADJ feedback input)."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 2.5 V output (typ. 2.5 V, min 2.45 V, max 2.55 V at Vin=3.8 V, 0 ≤ Iout ≤ 1 A). Requires a ~10 uF tantalum output capacitor for stability."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input voltage. For the 2.5 V variant, Vin must be ≥ 3.8 V for full regulation (dropout ~1.3 V @ 1 A). Absolute maximum input voltage is 18 V; recommended maximum operating input is 15 V. Requires a ~10 uF tantalum bypass capacitor."
      },
      {
        "number": "4",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 2.5 V output; electrically connected to pin 2. This is the large tab pad on the SOT-223 package and also serves as the primary thermal path to the PCB copper pour."
      }
    ],
    "provenance": {
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      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2309221048_MSKSEMI-AMS1117-2-5V_C5240656.pdf",
        "pages": 14,
        "sha256": "768f1a5d913d6211",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
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        "refuses_to_fabricate": true
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    },
    "viewers": {
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    },
    "pin1": {
      "pad": "1",
      "at": [
        -3.15,
        -2.3
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-223@sha256:49f22605ecc1fc70",
      "mark": "drawn"
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        "seat": "z = 0",
        "extents_mm": [
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          6.5,
          1.7
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ams1117-2-5v-etched.step",
        "role": "eda",
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
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        "sha256": "b13ea4610b36f8f25c336472c71aecb7f632e7ae7b1045c78253613aa7839031",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "MSKSEMI",
      "Package": "SOT-223",
      "Category": "PMIC",
      "Pins": "4"
    }
  },
  "sections": [
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  "discovery_pitch": "AMS1117-2.5V (MSKSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
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  "updated_at": "2026-09-24T16:22:17.875Z"
}