LT3741EUF#TRPBF

{
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  "type": "component",
  "slug": "lt3741euf-trpbf",
  "title": "LT3741EUF#TRPBF",
  "brief": "Analog Devices DC-DC Converters, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management ics",
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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": {
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      "source": "Component Ocean /api/assign-pns",
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        "pn": "LT3741EUF#TRPBFTR-ND",
        "status": "found"
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      "mouser": {
        "pn": "584-LT3741EUF#TRPBF",
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      }
    },
    "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": {
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        "at": "2026-10-30T15:49:46"
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      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/37411fg.pdf",
        "pages": 24,
        "sha256": "ffd25fe12b4612d5",
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  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "QFN-20-EP(4x4)",
      "Category": "Power Management ICs",
      "Pins": "21"
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          "symbol": "",
          "kind": "recommended_operating",
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        {
          "name": "VIN Pin Quiescent Current, Non-Switching Operation",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
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        {
          "name": "VIN Pin Quiescent Current, Shutdown Mode",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.1,
          "max": 1,
          "conditions": "VEN/UVLO = 0V, RT = 40kΩ",
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        {
          "name": "EN/UVLO Pin Falling Threshold",
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        {
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          "conditions": "VCTRL1 = 1.5V",
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          "name": "Internal VCC Regulator Regulation Voltage (VCC_INT Pin)",
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          "conditions": "CTRL1 = 1.5V, ISENSE– = 23µA, VSENSE+ = 2V",
          "source_page": 3,
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        {
          "name": "Current Control Loop gm Amp Offset Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": -3,
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          "max": 3,
          "conditions": "VCM = 4V",
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          "source": "datasheet"
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        {
          "name": "Current Control Loop gm Amp Transconductance",
          "symbol": "gm",
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          "min": 375,
          "typ": 475,
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        {
          "name": "Operating Temperature Range (LT3741EUF#TRPBF order grade E)",
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          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
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        {
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        {
          "name": "EN/UVLO Voltage",
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          "name": "VREF Voltage",
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          "name": "CTRL1 and CTRL2 Voltage",
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        {
          "name": "RT Voltage",
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          "name": "FB Voltage",
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          "name": "VCC_INT Voltage",
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          "name": "Storage Temperature Range",
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          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
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        },
        {
          "name": "Thermal Resistance Junction-to-Ambient (QFN package)",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 37,
          "max": null,
          "conditions": "UF package, 20-lead 4mm × 4mm QFN",
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          "name": "Maximum Junction Temperature (QFN package)",
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