LM2596R-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2596r-3-3",
  "title": "LM2596R-3.3",
  "brief": "HTC Korea TAEJIN Tech LM2596R 3 3 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",
    "lm2596r-3.3"
  ],
  "component": {
    "mpn": "LM2596R-3.3",
    "manufacturer": "HTC Korea TAEJIN Tech LM2596R 3 3",
    "package": "TO-263-5",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a11be599896b4edfa160807cc8c6b836.pdf",
    "parts": {
      "symbol": "lm2596r-3-3.kicad_sym",
      "footprint": "lm2596r-3-3.kicad_mod",
      "model_3d": "lm2596r-3-3-etched.glb",
      "model_3d_plain": "lm2596r-3-3.glb",
      "model_3d_step": "lm2596r-3-3-etched.step",
      "model_3d_step_plain": "lm2596r-3-3.step",
      "lbr": "lm2596r-3-3.lbr"
    },
    "distributor_links": {
      "lcsc": "C90690"
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Positive input supply, 4.5V to 40V operating (45V absolute max). Requires a suitable input bypass capacitor (typ. 470uF, 50V aluminum electrolytic) close to the pin to supply the switching currents and suppress voltage transients."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "output",
        "description": "Emitter of the internal 3A NPN switch (the switching node). Saturation voltage Vsat is typically 1.16V at Iout=3A. Connects to the external inductor and catch diode; keep the copper area small to minimize EMI coupling into sensitive circuitry."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Circuit ground pin. Should tie into a solid ground plane using short, wide traces along with the input capacitor, output capacitor, and catch diode return paths."
      },
      {
        "number": "4",
        "name": "FEEDBACK",
        "type": "input",
        "description": "Senses the regulated output voltage to close the feedback loop. In the fixed 3.3V version this pin connects directly to the regulated 3.3V output; internal R2/R1 divider sets the 3.3V regulation point against the 1.23V internal reference. Feedback bias current is typically 12nA."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "TTL-compatible shutdown input. Threshold is typically 1.3V (VIH=2.0V min, VIL=0.6V max). Driving above threshold (up to +Vin) shuts the regulator off, dropping supply current to ~80uA (250uA max). Leaving open or holding below 1.3V enables the regulator. Absolute range -0.3V to +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/a11be599896b4edfa160807cc8c6b836.pdf",
        "pages": 8,
        "sha256": "c89f43dda8481acd",
        "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": "lm2596r-3-3.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": "lm2596r-3-3-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": "e978ab26bd522c6eedf48ead0bf6b2ef26bd1e1d039447d12e0f116adf8f9946",
        "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": [
    "lm2596r-3.3"
  ],
  "discovery_pitch": "LM2596R-3.3 (HTC Korea TAEJIN Tech LM2596R 3 3) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm2596r-3-3.kicad_sym",
    "lm2596r-3-3.kicad_mod",
    "lm2596r-3-3.glb",
    "lm2596r-3-3.step",
    "lm2596r-3-3-etched.step",
    "lm2596r-3-3.lbr",
    "docs/hero.png",
    "docs/lm2596r-3-3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "variants": [
    {
      "mpn": "LM2596R-3.3",
      "kind": "packaging"
    },
    {
      "mpn": "LM2596R-ADJ",
      "kind": "different-part"
    },
    {
      "mpn": "LM2596T-3.3",
      "kind": "unknown"
    },
    {
      "mpn": "LM2596T-ADJ",
      "kind": "different-part"
    },
    {
      "mpn": "LM2596DP-ADJ",
      "kind": "different-part"
    }
  ],
  "updated_at": "2026-09-28T16:15:02.013Z"
}