LD1117-2.5

{
  "slug": "ld1117-2-5",
  "version": "0.2.3",
  "type": "component",
  "description": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "pmic",
    "ld1117-2.5"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ld1117-2-5.kicad_sym",
    "ld1117-2-5.kicad_mod",
    "ld1117-2-5.glb",
    "ld1117-2-5.step",
    "ld1117-2-5-etched.step",
    "ld1117-2-5.lbr",
    "docs/hero.png",
    "docs/ld1117-2-5-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pads.json",
    "ld1117-2-5-etched.glb",
    "ld1117-2-5-hero.glb",
    "ld1117-2-5-hero.overlay.json"
  ],
  "metadata": {
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "rows": [
        {
          "kind": "recommended_operating",
          "name": "Input capacitance",
          "symbol": "CIN",
          "min": null,
          "typ": null,
          "max": null,
          "unit": "uF",
          "conditions": "typical application circuit (p.7): 10uF polarised on VIN; \"The circuit and parameters are reference only\"; no written input condition",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "kind": "recommended_operating",
          "name": "Output capacitance",
          "symbol": "COUT",
          "min": null,
          "typ": null,
          "max": null,
          "unit": "uF",
          "conditions": "p.6: \"The LD1117 requires an output capacitor for device stability. Its value of 22uF tantalum covers all cases of bypassing the adjustment terminal. Without bypassing the adjustment terminal smaller capacitors can be used\"; application circuit 22uF (p.7)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "kind": "recommended_operating",
          "name": "Output capacitor ESR",
          "symbol": "ESR",
          "min": null,
          "typ": null,
          "max": null,
          "unit": "ohm",
          "conditions": "datasheet states no output capacitor ESR condition",
          "source_page": 6,
          "source": "datasheet",
          "stated": false
        },
        {
          "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"
        }
      ]
    }
  },
  "component": {
    "mpn": "LD1117-2.5",
    "manufacturer": "UMW",
    "package": "SOT-223",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1a7f277cc1171afc7d6650cbbfc8365b.pdf",
    "parts": {
      "symbol": "ld1117-2-5.kicad_sym",
      "footprint": "ld1117-2-5.kicad_mod",
      "model_3d": "ld1117-2-5-hero.glb",
      "model_3d_plain": "ld1117-2-5.glb",
      "model_3d_step": "ld1117-2-5-etched.step",
      "model_3d_step_plain": "ld1117-2-5.step",
      "lbr": "ld1117-2-5.lbr"
    },
    "distributor_links": {
      "lcsc": "C347228"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / device reference return. In the fixed-output LD1117-2.5, the pin-1 ADJ/GND node functions as GND (the internal feedback F1/F2 divider is connected and the A switch is disconnected per the block diagram)."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 2.5V output (2.450V-2.550V typ. at IOUT=10mA, VIN=4.5V, TJ=25°C). Supplies up to 1A load current. Requires an output capacitor for stability; on SOT-223 the tab is electrically connected to VOUT and serves as the primary heatsink."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Unregulated input supply. Absolute maximum 18V; recommended operating input 12V max. For fixed 2.5V output the minimum VIN must exceed VOUT + dropout (~1.2V @ 1A)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/1a7f277cc1171afc7d6650cbbfc8365b.pdf",
        "pages": 14,
        "sha256": "b65a8249b6e9e313",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "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-223-3_TabPin2@sha256:8ae5f03e2c16377a",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ld1117-2-5.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": "ld1117-2-5-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": "19e3c92a8065d10c9d9dcd87c5ac1c85f6836593aefd29ca4c3e787534123804",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "title": "LD1117-2.5",
  "brief": "UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "discovery_triggers": [
    "ld1117-2.5"
  ],
  "discovery_pitch": "LD1117-2.5 (UMW) component page with datasheet-verified CAD.",
  "visibility": "public"
}