LM2576R-ADJ

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2576r-adj",
  "title": "LM2576R-ADJ",
  "brief": "HTC Korea TAEJIN Tech DC-DC Converters, TO-263-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "lm2576r-adj"
  ],
  "component": {
    "mpn": "LM2576R-ADJ",
    "manufacturer": "HTC Korea TAEJIN Tech",
    "package": "TO-263-5",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/5d748262d3a84cca8b2cdd2b2c84a261.pdf",
    "parts": {
      "symbol": "lm2576r-adj.kicad_sym",
      "footprint": "lm2576r-adj.kicad_mod",
      "model_3d": "lm2576r-adj-etched.glb",
      "model_3d_plain": "lm2576r-adj.glb",
      "model_3d_step": "lm2576r-adj-etched.step",
      "model_3d_step_plain": "lm2576r-adj.step",
      "lbr": "lm2576r-adj.lbr"
    },
    "distributor_links": {
      "lcsc": "C91092"
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Positive input supply for the LM2576 step-down switching regulator. Absolute maximum 45V; operating up to 40V. Requires a bypass capacitor (Cin) close to the pin to minimize voltage transients and supply the switching currents."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "output",
        "description": "Emitter of the internal switching transistor (switch node). Saturation voltage V_SAT typically 1.5V (max 2V) at 3.0A. Connects to the external catch diode and inductor; PCB copper area on this pin should be kept small to minimize coupling to sensitive circuitry."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Circuit ground pin. Return for input bypass, output filter, and internal control circuitry. Also serves as the thermal return path via the TO-263 tab."
      },
      {
        "number": "4",
        "name": "FEEDBACK",
        "type": "input",
        "description": "Feedback sense input to the internal error amplifier. On the adjustable version this is the direct amplifier input; connect an external R1/R2 divider to program Vout via Vout = Vref(1 + R2/R1), Vref = 1.23V (R1 typically 1.0k-5.0k). Feedback bias current typically 25nA (max 200nA over temperature)."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "TTL-compatible shutdown input. Threshold typically 1.4V: pulling above the threshold (up to +Vin) shuts the regulator off (drops supply current to ~80µA); low or open enables normal operation. Input voltage range -0.3V ≤ V ≤ +Vin."
      },
      {
        "number": "6",
        "name": "TAB",
        "type": "power_in",
        "description": "Exposed thermal pad. Present in the package land pattern; connect it per the manufacturer datasheet thermal recommendation. Added because the footprint carries this pad and the symbol had no pin for it.",
        "source": "derived-from-footprint"
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/5d748262d3a84cca8b2cdd2b2c84a261.pdf",
        "pages": 11,
        "sha256": "2acb3c8a94295de6",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -7.65,
        -3.4
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TO-263-5_TabPin6@sha256:77e8ff2d643255fc",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "lm2576r-adj.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15,
          10,
          4.42
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "94c2a3dc1aaad85b6b5193f97d9a7c61b4e28bac25952a1e629557bcf747e246",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2576r-adj-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15,
          10,
          4.42
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4d7d0ff5b534f536a56b0bd9b5aa406755efdab58376ec21ddd85692d99dcb2f",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HTC Korea TAEJIN Tech",
      "Package": "TO-263-5",
      "Category": "PMIC",
      "Pins": "5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm2576r-adj"
  ],
  "discovery_pitch": "LM2576R-ADJ (HTC Korea TAEJIN Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm2576r-adj.kicad_sym",
    "lm2576r-adj.kicad_mod",
    "lm2576r-adj.glb",
    "lm2576r-adj.step",
    "lm2576r-adj-etched.step",
    "lm2576r-adj.lbr",
    "docs/hero.png",
    "docs/lm2576r-adj-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "variants": [
    {
      "mpn": "LM2576R-ADJ",
      "kind": "packaging"
    },
    {
      "mpn": "LM2576T-ADJ",
      "kind": "different-part"
    },
    {
      "mpn": "LM2576DP-ADJ",
      "kind": "different-part"
    }
  ],
  "updated_at": "2026-09-25T00:11:10.331Z"
}