LT1121CST-5#PBF

{
  "slug": "lt1121cst-5-pbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Linear Voltage Regulators (LDO), SOT-223-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "lt1121cst-5#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lt1121cst-5-pbf.kicad_sym",
    "lt1121cst-5-pbf.kicad_mod",
    "lt1121cst-5-pbf.glb",
    "lt1121cst-5-pbf.step",
    "lt1121cst-5-pbf.lbr",
    "docs/hero.png",
    "docs/lt1121cst-5-pbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lt1121cst-5-pbf-hero.glb",
    "lt1121cst-5-pbf-hero.overlay.json",
    "lt1121cst-5-pbf-etched.glb"
  ],
  "component": {
    "mpn": "LT1121CST-5#PBF",
    "manufacturer": "Analog Devices",
    "package": "SOT-223-3",
    "pin_count": 3,
    "category": "Power Management ICs",
    "subcategory": "Linear Voltage Regulators (LDO)",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/1121fg.pdf",
    "parts": {
      "symbol": "lt1121cst-5-pbf.kicad_sym",
      "footprint": "lt1121cst-5-pbf.kicad_mod",
      "model_3d": "lt1121cst-5-pbf-hero.glb",
      "model_3d_plain": "lt1121cst-5-pbf-etched.glb",
      "model_3d_step": "lt1121cst-5-pbf-etched.step",
      "model_3d_step_plain": "lt1121cst-5-pbf.step",
      "lbr": "lt1121cst-5-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C661285",
      "digikey": "505-LT1121CST-5#PBF-ND",
      "mouser": "584-LT1121CST-5#PBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T15:57:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-LT1121CST-5#PBF-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT1121CST-5#PBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin, rated for 30V maximum on the LT1121 and protected against reverse input voltage, and should be bypassed with 0.1µF to 1µF if more than six inches from the main input filter capacitor."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, electrically common with the package tab."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated 5V output supplying up to 150mA, which needs an output capacitor (minimum recommended 1µF with ESR of 3Ω or less) for stability and has a 10mA maximum reverse current rating."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The SOT-223 pin mapping is taken from the garbled front-view text on page 2 (3 2 1 with TAB IS GND, "
        ],
        "pages_sent": 16,
        "cost_usd": 0.0265,
        "at": "2026-10-28T15:57:03"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/1121fg.pdf",
        "pages": 16,
        "sha256": "326db42fecefd774",
        "source_tier": "mfr"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "lt1121cst-5-pbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          6.5,
          1.7
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt1121cst-5-pbf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          6.5,
          1.7
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f923026bc727d5a657107d957592f6770441812d6ae4500a97e17639e8f9ddf1",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}