LT3741EFE#TRPBF

{
  "slug": "lt3741efe-trpbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices DC-DC Converters, TSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lt3741efe#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lt3741efe-trpbf.kicad_sym",
    "lt3741efe-trpbf.kicad_mod",
    "lt3741efe-trpbf.glb",
    "lt3741efe-trpbf.step",
    "lt3741efe-trpbf.lbr",
    "docs/hero.png",
    "docs/lt3741efe-trpbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lt3741efe-trpbf-hero.glb",
    "lt3741efe-trpbf-hero.overlay.json",
    "lt3741efe-trpbf-etched.glb"
  ],
  "component": {
    "mpn": "LT3741EFE#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "TSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905055219568640",
    "parts": {
      "symbol": "lt3741efe-trpbf.kicad_sym",
      "footprint": "lt3741efe-trpbf.kicad_mod",
      "model_3d": "lt3741efe-trpbf-hero.glb",
      "model_3d_plain": "lt3741efe-trpbf-etched.glb",
      "model_3d_step": "lt3741efe-trpbf-etched.step",
      "model_3d_step_plain": "lt3741efe-trpbf.step",
      "lbr": "lt3741efe-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C671323",
      "digikey": "LT3741EFE#TRPBFTR-ND",
      "mouser": "584-LT3741EFE#TRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:28:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LT3741EFE#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT3741EFE#TRPBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC_INT",
        "type": "power_out",
        "description": "A regulated 5V output that charges the CBOOT capacitor and powers the digital and switching subcircuits, current limited to 50mA, and it must be tied to the rail when VIN is below 6V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the controller, to be connected to the PCB ground together with the exposed pad."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin for a 6V to 36V input range, which must be locally bypassed with a 4.7µF low-ESR capacitor to ground."
      },
      {
        "number": "4",
        "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 internal pull-up or pull-down, and shuts down fully at about 0.5V."
      },
      {
        "number": "5",
        "name": "VREF",
        "type": "power_out",
        "description": "Buffered 2V reference output capable of 0.5mA drive and current limited to 1mA."
      },
      {
        "number": "6",
        "name": "CTRL2",
        "type": "input",
        "description": "Thermal control input that reduces the regulated current level, with an analog control range of 0V to 1.5V."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the controller."
      },
      {
        "number": "8",
        "name": "CTRL1",
        "type": "input",
        "description": "Analog input that sets the high-level regulated output current and overcurrent point, with its input internally clamped to 1.5V."
      },
      {
        "number": "9",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start pin that needs an external capacitor to ground, charged with an 11µA current source to limit regulated current during start-up."
      },
      {
        "number": "10",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin for voltage regulation with a 1.21V reference, where a feedback voltage above 1.5V triggers overvoltage protection that stops switching for 13µs."
      },
      {
        "number": "11",
        "name": "SENSE+",
        "type": "input",
        "description": "Connects to the external current sense resistor RS and is described as the inverting input of the average current mode loop error amplifier."
      },
      {
        "number": "12",
        "name": "SENSE–",
        "type": "input",
        "description": "Connects to the output side of the sense resistor RS and is described as the non-inverting input of the average current mode loop error amplifier, with the reference current flowing out of this pin."
      },
      {
        "number": "13",
        "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."
      },
      {
        "number": "14",
        "name": "RT",
        "type": "passive",
        "description": "A 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": "15",
        "name": "SYNC",
        "type": "input",
        "description": "Frequency synchronization input for an external clock, which should be grounded when not in use and requires the RT-set clock to run 20% slower than the SYNC frequency."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the controller."
      },
      {
        "number": "17",
        "name": "HG",
        "type": "output",
        "description": "High-side external power FET gate drive output with a 2.3Ω pull-up and 1.3Ω pull-down impedance."
      },
      {
        "number": "18",
        "name": "SW",
        "type": "passive",
        "description": "Lower rail for the floating high-side driver that connects the two power FETs and the inductor."
      },
      {
        "number": "19",
        "name": "CBOOT",
        "type": "power_out",
        "description": "Provides a floating 5V regulated supply for the high-side driver, charged through an external Schottky diode from VCC_INT."
      },
      {
        "number": "20",
        "name": "LG",
        "type": "output",
        "description": "Low-side external power FET gate drive output with a 2.3Ω pull-up and 1.0Ω pull-down impedance."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad that is internally GND and 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 datasheet text is internally inconsistent about SENSE+ and SENSE-: SENSE+ is called the invertin; Pin numbers and pin names come from the TSSOP top-view listing and the TSSOP pin-function list, whic"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0766,
        "at": "2026-10-18T03:24:47"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905055219568640",
        "pages": 24,
        "sha256": "ffd25fe12b4612d5",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lt3741efe-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6380af9237ddd89c7b8a89811c4d8d8c243fce4275861b2398f2cf3d1c626be0",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt3741efe-trpbf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "85884e6dc48392d689a1116fef27ef1b3606c810d9a3e7ed48a2d8833ea58a17",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}