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Ray Set visibility: public b050c3c 24d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2576s-3-3",
  "title": "LM2576S-3.3",
  "brief": "UMW DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2576s-3.3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM2576S-3.3",
    "manufacturer": "UMW",
    "package": "TO-263-5",
    "pin_count": 6,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757272252532703232",
    "parts": {
      "symbol": "lm2576s-3-3.kicad_sym",
      "footprint": "lm2576s-3-3.kicad_mod",
      "model_3d": "lm2576s-3-3-hero.glb",
      "model_3d_plain": "lm2576s-3-3-etched.glb",
      "model_3d_step": "lm2576s-3-3-etched.step",
      "model_3d_step_plain": "lm2576s-3-3.step",
      "lbr": "lm2576s-3-3.lbr"
    },
    "distributor_links": {
      "lcsc": "C347412"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T21:24:48Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage: operating range is 4.5V to 40V for LM2576 (4.5V to 60V for LM2576HV), with absolute maximum supply voltage of 45V for LM2576 (63V for LM2576HV)."
      },
      {
        "number": "2",
        "name": "Output",
        "type": "output",
        "description": "Switching output that drives the inductor and catch diode, rated for 3A guaranteed output current, with output voltage to ground (steady state) not below -1V."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin; single-point or ground-plane grounding is recommended for best regulation and minimal ground-loop noise."
      },
      {
        "number": "4",
        "name": "Feedback",
        "type": "input",
        "description": "Output voltage feedback input that regulates to the internal 1.23V reference, with feedback bias current of 100/500 nA maximum."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "TTL shutdown input that is active when low or floating and turns the regulator off when driven high (VIH 2.2/2.4V min, VIL 1.0/0.8V max), with about 50 µA standby current in shutdown."
      },
      {
        "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 datasheet gives one pinning table (page 3) shared by TO-220B/TO-220 and TO-263 with identical pi; Pin descriptions combine the pin-function table on page 3 with electrical limits from other pages: V; ON/OFF electrical table (page 9) is internally inconsistent as extracted: VIH typical is 1.4V while ",
          "exposed pad 6 added from the footprint"
        ],
        "pages_sent": 18,
        "cost_usd": 0.0473,
        "at": "2026-10-17T21:23:27"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757272252532703232",
        "pages": 18,
        "sha256": "10275fb18a78ad8b",
        "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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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          10,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "94c2a3dc1aaad85b6b5193f97d9a7c61b4e28bac25952a1e629557bcf747e246",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "centre_offset_mm": 0,
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        "sha256": "bdf8a2079c57e795b5e812163ac32b715268b185f9ee2ca058b7d160a4bb5c6f",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "TO-263-5",
      "Category": "Power Management (PMIC)",
      "Pins": "6"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "10275fb18a78ad8b6be3776eb3bedbd0d35934346b3ac23325a5215479601b22",
      "rows": [
        {
          "name": "Output voltage, 3.3V version (VIN=12V, ILOAD=0.5A)",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 3.234,
          "typ": 3.3,
          "max": 3.366,
          "conditions": "VIN=12V, ILOAD=0.5A, Circuit of Figure 2",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output voltage, 3.3V version (line and load, LM2576)",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 3.135,
          "typ": 3.3,
          "max": 3.465,
          "conditions": "6V≤VIN≤40V, 0.5A≤ILOAD≤3A, Circuit of Figure 2",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Oscillator frequency",
          "symbol": "fO",
          "kind": "electrical",
          "unit": "kHz",
          "min": 47,
          "typ": 52,
          "max": 58,
          "conditions": "Unless otherwise specified: VIN=12V (3.3V version), ILOAD=500mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Saturation voltage",
          "symbol": "VSAT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.4,
          "max": 2,
          "conditions": "IOUT=3A (Note 4)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Max duty cycle (ON)",
          "symbol": "DC",
          "kind": "electrical",
          "unit": "%",
          "min": 93,
          "typ": 98,
          "max": null,
          "conditions": "Unless otherwise specified: VIN=12V (3.3V version), ILOAD=500mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Current limit",
          "symbol": "ICL",
          "kind": "electrical",
          "unit": "A",
          "min": 3.5,
          "typ": 5.8,
          "max": 7.5,
          "conditions": "Unless otherwise specified: VIN=12V (3.3V version), ILOAD=500mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Feedback bias current",
          "symbol": "IB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 50,
          "max": 500,
          "conditions": "Unless otherwise specified: VIN=12V (3.3V version), ILOAD=500mA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Standby quiescent current",
          "symbol": "ISTBY",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 50,
          "max": 200,
          "conditions": "ON/OFF pin=5V (OFF)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin logic input level high",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": 1.4,
          "max": null,
          "conditions": "VOUT=0V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin logic input level low",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.2,
          "max": 0.8,
          "conditions": "VOUT=Nominal Output Voltage",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin input current high",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 12,
          "max": 30,
          "conditions": "ON/OFF Pin=5V(OFF)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin input current low",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0,
          "max": 10,
          "conditions": "ON/OFF Pin=0V(ON)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Minimum supply voltage (LM2576)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 45,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ON/OFF pin input voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Printed as -0.3 ≤ V ≤ +VIN",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage to ground (steady state)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": null,
          "conditions": "Steady state",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum ESD rating",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "C=100pF, R=1.5kΩ",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature (soldering)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 seconds",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range (LM2576)",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Temperature Range (LM2576/LM2576HV)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage (LM2576)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "LM2576S-3.3 (UMW) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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