LM2576S-3.3-MS

{
  "slug": "lm2576s-3-3-ms",
  "version": "0.1.0",
  "type": "component",
  "description": "MSKSEMI DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2576s-3.3-ms",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm2576s-3-3-ms.kicad_sym",
    "lm2576s-3-3-ms.kicad_mod",
    "lm2576s-3-3-ms.glb",
    "lm2576s-3-3-ms.step",
    "lm2576s-3-3-ms.lbr",
    "docs/hero.png",
    "docs/lm2576s-3-3-ms-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2576s-3-3-ms-hero.glb",
    "lm2576s-3-3-ms-hero.overlay.json",
    "lm2576s-3-3-ms-etched.glb"
  ],
  "component": {
    "mpn": "LM2576S-3.3-MS",
    "manufacturer": "MSKSEMI",
    "package": "TO-263-5",
    "pin_count": 6,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590893452115210240",
    "parts": {
      "symbol": "lm2576s-3-3-ms.kicad_sym",
      "footprint": "lm2576s-3-3-ms.kicad_mod",
      "model_3d": "lm2576s-3-3-ms-hero.glb",
      "model_3d_plain": "lm2576s-3-3-ms-etched.glb",
      "model_3d_step": "lm2576s-3-3-ms-etched.step",
      "model_3d_step_plain": "lm2576s-3-3-ms.step",
      "lbr": "lm2576s-3-3-ms.lbr"
    },
    "distributor_links": {
      "lcsc": "C5189810"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T06:53:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Vin",
        "type": "power_in",
        "description": "Input supply voltage; the LM2576 operating supply range is 40 V to 57 V for the HV version, with an absolute maximum supply voltage of 45 V (LM2576) and 57 V (LM2576HV)."
      },
      {
        "number": "2",
        "name": "Output",
        "type": "output",
        "description": "Switching output that drives the external inductor and catch diode; it must not go below -1 V to ground in steady state."
      },
      {
        "number": "3",
        "name": "Gnd",
        "type": "power_in",
        "description": "Ground reference pin for the regulator and the external components."
      },
      {
        "number": "4",
        "name": "Feedback",
        "type": "input",
        "description": "Output voltage feedback input, which is set to 1.23 V reference for the adjustable version and is internally fixed for the 3.3 V version."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "Shutdown control that is active low or floating (TTL level, VIH 2.2/2.4 V min, VIL 1.0/0.8 V max), and its absolute input range is -0.3 V to +VIN."
      },
      {
        "number": "6",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 LM2576S-3.3 variant is listed under TO-263 in the ordering table on page 3, and the pin assignme",
          "exposed pad 6 added from the footprint"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0452,
        "at": "2026-10-18T06:52:23"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590893452115210240",
        "pages": 12,
        "sha256": "bc60041f4dd916f0",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "lm2576s-3-3-ms.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15.0,
          10.0,
          4.42
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "94c2a3dc1aaad85b6b5193f97d9a7c61b4e28bac25952a1e629557bcf747e246",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2576s-3-3-ms-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.42
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7427a66baf819cc0faba227f947c2e1f57b87945652edbbd0038cc0901191853",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}