LT3741EUF#TRPBF

{
  "slug": "lt3741euf-trpbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices DC-DC Converters, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "lt3741euf#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lt3741euf-trpbf.kicad_sym",
    "lt3741euf-trpbf.kicad_mod",
    "lt3741euf-trpbf.glb",
    "lt3741euf-trpbf.step",
    "lt3741euf-trpbf.lbr",
    "docs/hero.png",
    "docs/lt3741euf-trpbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "lt3741euf-trpbf-hero.overlay.json",
    "lt3741euf-trpbf-etched.glb"
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  "component": {
    "mpn": "LT3741EUF#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/37411fg.pdf",
    "parts": {
      "symbol": "lt3741euf-trpbf.kicad_sym",
      "footprint": "lt3741euf-trpbf.kicad_mod",
      "model_3d": "lt3741euf-trpbf-hero.glb",
      "model_3d_plain": "lt3741euf-trpbf-etched.glb",
      "model_3d_step": "lt3741euf-trpbf-etched.step",
      "model_3d_step_plain": "lt3741euf-trpbf.step",
      "lbr": "lt3741euf-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C671327",
      "digikey": "LT3741EUF#TRPBFTR-ND",
      "mouser": "584-LT3741EUF#TRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T15:50:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LT3741EUF#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT3741EUF#TRPBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EN/UVLO",
        "type": "input",
        "description": "Enable pin that turns on the internal bias at a 1.55V falling threshold with 130mV hysteresis, has no pull-up or pull-down, and full shutdown occurs at about 0.5V; absolute maximum voltage is 6V."
      },
      {
        "number": "2",
        "name": "VREF",
        "type": "power_in",
        "description": "Buffered 2V reference that can supply up to 500µA, current limited to 1mA, and is rated to 3V absolute maximum."
      },
      {
        "number": "3",
        "name": "CTRL2",
        "type": "input",
        "description": "Thermal control input used to reduce the regulated current level, with absolute maximum voltage of 3V."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin that must be connected to the system ground."
      },
      {
        "number": "5",
        "name": "CTRL1",
        "type": "input",
        "description": "Sets the high-level regulated output current and overcurrent point, with a control range of 0V to 1.5V that is internally clamped to 1.5V."
      },
      {
        "number": "6",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start pin with an external capacitor to ground that is charged with an 11µA source to limit the regulated current during start-up; absolute maximum voltage is 6V."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin for voltage regulation with a 1.21V feedback voltage, where overvoltage above 1.5V prevents switching for 13µs; absolute maximum voltage is 3V."
      },
      {
        "number": "8",
        "name": "SENSE+",
        "type": "input",
        "description": "Inverting input of the average current-mode error amplifier, connected to the external sense resistor RS; absolute maximum voltage is 40V."
      },
      {
        "number": "9",
        "name": "SENSE–",
        "type": "input",
        "description": "Non-inverting input of the average current-mode error amplifier, from which the reference current flows to the output side of RS; absolute maximum voltage is 40V."
      },
      {
        "number": "10",
        "name": "VC",
        "type": "passive",
        "description": "Compensation pin for the average current loop, with typical values of 20k to 50k for the resistor and 2nF to 5nF for the capacitor; absolute maximum voltage is 3V."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin that must be connected to the system ground."
      },
      {
        "number": "12",
        "name": "RT",
        "type": "passive",
        "description": "Resistor to ground sets the switching frequency from 200kHz to 1MHz, the pin is current limited to 60µA, and it must not be left open."
      },
      {
        "number": "13",
        "name": "SYNC",
        "type": "input",
        "description": "Frequency synchronization pin where RT should be set 20% slower than the SYNC pulse frequency; it should be grounded when not in use and has a 6V absolute maximum."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin that must be connected to the system ground."
      },
      {
        "number": "15",
        "name": "HG",
        "type": "output",
        "description": "Gate drive for the high-side external power FET with 2.3Ω pull-up and 1.3Ω pull-down impedance."
      },
      {
        "number": "16",
        "name": "SW",
        "type": "passive",
        "description": "Lower rail for the floating high-side driver that connects the two power FETs and the inductor; absolute maximum voltage is 40V."
      },
      {
        "number": "17",
        "name": "CBOOT",
        "type": "power_out",
        "description": "Floating 5V regulated supply for the high-side FET driver, charged through an external Schottky diode from VCC_INT; absolute maximum voltage is 46V."
      },
      {
        "number": "18",
        "name": "LG",
        "type": "output",
        "description": "Gate drive for the low-side external power FET with 2.3Ω pull-up and 1.0Ω pull-down impedance."
      },
      {
        "number": "19",
        "name": "VCC_INT",
        "type": "power_out",
        "description": "Regulated 5V output for charging the CBOOT capacitor and powering digital and switching circuits, current limited to 50mA; tie to the rail when VIN is below 6V; absolute maximum voltage is 6V."
      },
      {
        "number": "20",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin for the 6V to 36V input range, which must be locally bypassed with a 4.7µF low-ESR capacitor to ground; absolute maximum voltage is 40V."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad, internally GND, that must be soldered to the PCB."
      }
    ],
    "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 QFN top-view drawing text on page 2 is scrambled, so the QFN pin numbers were taken from the exp; GND is listed on pins 4, 11, 14 and the exposed pad 21; pin 21 is the exposed pad and is included as; Only the QFN (UF) package pinout was extracted, which matches the LT3741EUF#TRPBF ordering code. The"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0733,
        "at": "2026-10-30T15:49:46"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/37411fg.pdf",
        "pages": 24,
        "sha256": "ffd25fe12b4612d5",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lt3741euf-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt3741euf-trpbf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3c338d3c72b588b0e492a7a1ee7f66aa2b52852936bdcd9fa0dbce023dcb10e8",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "UF20",
      "source_page": 21,
      "e": {
        "nom_mm": 0.5,
        "range_mm": [
          null,
          null
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "lt3741euf-trpbf.step",
        "verdict": "SKIP",
        "reasons": [
          "the datasheet dimensions give no height or body size to compare"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}