LM2578AN

{
  "slug": "lm2578an",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2578an",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm2578an.kicad_sym",
    "lm2578an.kicad_mod",
    "lm2578an.glb",
    "lm2578an.step",
    "lm2578an.lbr",
    "docs/hero.png",
    "docs/lm2578an-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2578an-hero.glb",
    "lm2578an-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM2578AN",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm2578a",
    "parts": {
      "symbol": "lm2578an.kicad_sym",
      "footprint": "lm2578an.kicad_mod",
      "model_3d": "lm2578an-hero.glb",
      "model_3d_plain": "lm2578an.glb",
      "model_3d_step": "lm2578an-etched.step",
      "model_3d_step_plain": "lm2578an.step",
      "lbr": "lm2578an.lbr"
    },
    "distributor_links": {
      "lcsc": "C1355530",
      "digikey": "2156-LM2578AN-ND",
      "mouser": "926-LM2578AN"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T21:55:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM2578AN-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "926-LM2578AN",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "-INPUT",
        "type": "input",
        "description": "Inverting comparator input with an internal 1.0V reference; the feedback input used for buck, boost and inverting configurations."
      },
      {
        "number": "2",
        "name": "+INPUT",
        "type": "input",
        "description": "Non-inverting comparator input with an internal 1.0V reference; any external voltage applied above the reference must be limited to less than 5 mA."
      },
      {
        "number": "3",
        "name": "OSC",
        "type": "passive",
        "description": "Oscillator pin where a single external timing capacitor sets the switching frequency from <1 Hz to 100 kHz, fOSC = 8x10^-5/C1."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; the emitter must not be pulled more than 1V below this pin (0.6V for TJ >= 100°C)."
      },
      {
        "number": "5",
        "name": "EMITTER",
        "type": "output",
        "description": "Emitter of the 750 mA output transistor, which must not be driven more than 1V below ground and is rated -1V to +50V."
      },
      {
        "number": "6",
        "name": "COLLECTOR",
        "type": "output",
        "description": "Collector of the 750 mA output transistor, rated -0.3V to +50V with saturation voltage under 0.9V."
      },
      {
        "number": "7",
        "name": "CURRENT LIMIT",
        "type": "input",
        "description": "Cycle-by-cycle current limit terminal referenced to either VIN or ground, activating when pulled 110 mV away from either."
      },
      {
        "number": "8",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input operating from 2V to 40V, with total supply voltage rated at 50V maximum."
      }
    ],
    "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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet gives no pin types. They were assigned from pin functions: OSC as passive, and EMITTER",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 33,
        "cost_usd": 0.6721,
        "at": "2026-10-07T21:55:19"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm2578a",
        "pages": 33,
        "sha256": "6b628780505f380b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm2578an.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2578an-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ab890eb00676eba64e5d24005edabd5a2ebc3043d05bc79e1fea85d2714e829a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}