LD1117ASTR

{
  "schema_version": 1,
  "type": "component",
  "slug": "ld1117astr",
  "title": "LD1117ASTR",
  "brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.1",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "ld1117astr"
  ],
  "component": {
    "mpn": "LD1117ASTR",
    "manufacturer": "STMicroelectronics",
    "package": "SOT-223-3",
    "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/2304140030_STMicroelectronics-LD1117ASTR_C283464.pdf",
    "parts": {
      "symbol": "ld1117astr.kicad_sym",
      "footprint": "ld1117astr.kicad_mod",
      "model_3d": "ld1117astr-hero.glb",
      "model_3d_plain": "ld1117astr.glb",
      "model_3d_step": "ld1117astr-etched.step",
      "model_3d_step_plain": "ld1117astr.step",
      "lbr": "ld1117astr.lbr"
    },
    "distributor_links": {
      "digikey": "497-1229-2-ND",
      "mouser": "511-LD1117ASTR",
      "lcsc": "C283464"
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJ/GND",
        "type": "input",
        "description": "Adjust pin (adjustable version) - connect to a resistor divider from VOUT to set the output voltage, where VOUT = 1.25 V x (1 + R2/R1) + IADJ x R2. In fixed-voltage variants this pin is the device ground."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output. For the adjustable LD1117ASTR (this variant), VOUT is programmed via the ADJ divider from VREF = 1.25 V. Supplies up to 1 A; requires ≥10 µF for stability. The exposed TAB is internally tied to VOUT."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated DC input supply. Absolute maximum DC input voltage 15 V. Must exceed VOUT by the dropout voltage (typ. 1.15 V at 1 A)."
      },
      {
        "number": "4",
        "name": "TAB",
        "type": "power_out",
        "description": "Thermal tab, internally connected to VOUT. Solder to a copper pour for heatsinking (SOT-223 RthJA = 110 °C/W)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2304140030_STMicroelectronics-LD1117ASTR_C283464.pdf",
        "pages": 24,
        "sha256": "c2dd41daa75f2827",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -3.15,
        -2.3
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-223@sha256:49f22605ecc1fc70",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ld1117astr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          6.5,
          1.7
        ],
        "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": "ld1117astr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          6.5,
          1.7
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6735ea5d1dc17e1e54df82a4f008e78553a715998c93ae1ece2aa798b71bb712",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOT-223-3",
      "Category": "PMIC",
      "Pins": "4"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "rows": [
        {
          "name": "Output current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 1000,
          "typ": 2,
          "max": 5,
          "conditions": "Vin = 10 V; datasheet prints several: 5 mA (Vin = 10 V Minimum load current), 1200 mA (VI - VO = 5 V, TJ = 25 °C Output current); the most conservative is kept",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ld1117astr"
  ],
  "discovery_pitch": "LD1117ASTR (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ld1117astr.kicad_sym",
    "ld1117astr.kicad_mod",
    "ld1117astr.glb",
    "ld1117astr.step",
    "ld1117astr-etched.step",
    "ld1117astr.lbr",
    "docs/hero.png",
    "docs/ld1117astr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pads.json",
    "ld1117astr-etched.glb",
    "ld1117astr-hero.glb",
    "ld1117astr-hero.overlay.json"
  ],
  "visibility": "public",
  "variants": [
    {
      "mpn": "LD1117ASTR",
      "kind": "packaging"
    },
    {
      "mpn": "LD1117AS12TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117AS18TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117AS33TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117ADT-TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117ADT12TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117ADT18TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117ADT33TR",
      "kind": "unknown"
    },
    {
      "mpn": "LD1117AV33",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-24T23:46:48.889Z",
  "description": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}