A4447SLJTR-T

{
  "slug": "a4447sljtr-t",
  "version": "0.1.0",
  "type": "component",
  "description": "Allegro MicroSystems, LLC DC-DC Converters, SOIC-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "a4447sljtr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "a4447sljtr-t.kicad_sym",
    "a4447sljtr-t.kicad_mod",
    "a4447sljtr-t.glb",
    "a4447sljtr-t.step",
    "a4447sljtr-t.lbr",
    "docs/hero.png",
    "docs/a4447sljtr-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "a4447sljtr-t-hero.glb",
    "a4447sljtr-t-hero.overlay.json",
    "a4447sljtr-t-etched.glb"
  ],
  "component": {
    "mpn": "A4447SLJTR-T",
    "manufacturer": "Allegro MicroSystems, LLC",
    "package": "SOIC-8-EP",
    "pin_count": 9,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/5225d5207997cf67206ffef24ccec1b6.pdf",
    "parts": {
      "symbol": "a4447sljtr-t.kicad_sym",
      "footprint": "a4447sljtr-t.kicad_mod",
      "model_3d": "a4447sljtr-t-hero.glb",
      "model_3d_plain": "a4447sljtr-t-etched.glb",
      "model_3d_step": "a4447sljtr-t-etched.step",
      "model_3d_step_plain": "a4447sljtr-t.step",
      "lbr": "a4447sljtr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C112017"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T23:01:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 711 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BOOT",
        "type": "passive",
        "description": "Gate drive boost node, connected to the LX node through an external bootstrap capacitor (CBOOT 0.01 µF in the typical application)."
      },
      {
        "number": "2",
        "name": "ENB",
        "type": "input",
        "description": "On/off control logic input: pulled low (below 1.0 V) to enable the output and start soft start, open circuit (2.0 to 7 V) disables the switcher."
      },
      {
        "number": "3",
        "name": "TSET",
        "type": "passive",
        "description": "Off-time setting pin: a resistor to ground sets the fixed off-time, with RTSET not smaller than 7.65 kΩ ±2%."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input for the adjustable regulator, regulated to 0.8 V (±2%) from the output resistor divider."
      },
      {
        "number": "6",
        "name": "VBIAS",
        "type": "power_in",
        "description": "Bias supply input, connected to VOUT when the VOUT target is between 3.3 and 5 V (absolute maximum 7 V), otherwise left open or fed from an external source."
      },
      {
        "number": "7",
        "name": "LX",
        "type": "output",
        "description": "Buck switching node connecting to the external inductor and catch diode."
      },
      {
        "number": "8",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input, 8 to 50 V operating range with 50 V absolute maximum."
      },
      {
        "number": "9",
        "name": "PAD",
        "type": "passive",
        "description": "Exposed thermal pad on the bottom, to be soldered to a ground copper area with thermal vias for heat dissipation."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet's terminal list does not number or describe the exposed pad. The pinout diagram only l; The BOOT pin type and its connection are inferred. The datasheet says only 'Gate drive boost node' a; The VBIAS pin type is inferred from its function as a bias supply input. It can also be left open, a"
        ],
        "pages_sent": 12,
        "cost_usd": 0.1042,
        "at": "2026-10-22T23:00:50"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/5225d5207997cf67206ffef24ccec1b6.pdf",
        "pages": 12,
        "sha256": "16a3d24d2c6d99ee",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "a4447sljtr-t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2d6f7e774e8143e3320cbd59eb5be9f3b7864614644e3b072006e1eb05fb7fa6",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a4447sljtr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "323bcee74fffaaee397cae94ecdb7af6e37e011b0c24a60d81b606c4f43356be",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}