LD1117S33TR

{
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  "type": "component",
  "slug": "ld1117s33tr",
  "title": "LD1117S33TR",
  "brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.1",
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  "component": {
    "mpn": "LD1117S33TR",
    "manufacturer": "STMicroelectronics",
    "package": "SOT-223",
    "pin_count": 4,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://www.st.com/resource/en/datasheet/ld1117s33tr.pdf",
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      "lbr": "ld1117s33tr.lbr"
    },
    "distributor_links": {
      "digikey": "497-1242-2-ND",
      "mouser": "511-LD1117S33",
      "lcsc": "C86781"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / regulator common return. 0 V reference for VIN and VOUT."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 3.3 V output, up to 800 mA. Requires a 10 µF minimum capacitor to ground for loop stability. Electrically connected to the SOT-223 tab."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated DC input supply. Recommended 100 nF bypass to GND. Absolute maximum 15 V (18 V when IOUT < 20 mA); must exceed VOUT by ~1 V (typical dropout) at full load."
      },
      {
        "number": "4",
        "name": "TAB",
        "type": "power_out",
        "description": "Metal heat-spreader tab, internally bonded to VOUT. Solder to a copper pour for thermal dissipation; the pour is at VOUT potential and must be treated as such."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/ld1117s33tr.pdf",
        "pages": 44,
        "sha256": "1b80923ec6ca9161",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    },
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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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        "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": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-07",
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        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "f53983f6cd2ff25cdc0b34edbee1d4c4b16c60684eceb0a891cfa8c2caab3a19",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOT-223",
      "Category": "PMIC",
      "Pins": "4"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "rows": [
        {
          "name": "Output current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 800,
          "typ": 950,
          "max": 1300,
          "conditions": "Vin = 8.3 V, TJ = 25 °C",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "DC input voltage; 18 V when IOUT < 20 mA",
          "source_page": 7,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "LD1117S33TR (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "files": [
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    "ld1117s33tr.step",
    "ld1117s33tr-etched.step",
    "ld1117s33tr.lbr",
    "docs/hero.png",
    "docs/ld1117s33tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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  "visibility": "public",
  "variants": [
    {
      "mpn": "LD1117S33TR",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117S33TRDT33TR",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117S33TRD33TR",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117S33TRV33",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T23:48:41.634Z",
  "description": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}