LTC1871EMS#TRPBF

{
  "schema_version": 1,
  "type": "component",
  "slug": "ltc1871ems-trpbf",
  "title": "LTC1871EMS#TRPBF",
  "brief": "Analog Devices DC-DC Converters, MSOP-10. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "ltc1871ems#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LTC1871EMS#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "MSOP-10",
    "pin_count": 10,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886140157349888",
    "parts": {
      "symbol": "ltc1871ems-trpbf.kicad_sym",
      "footprint": "ltc1871ems-trpbf.kicad_mod",
      "model_3d": "ltc1871ems-trpbf-hero.glb",
      "model_3d_plain": "ltc1871ems-trpbf-etched.glb",
      "model_3d_step": "ltc1871ems-trpbf-etched.step",
      "model_3d_step_plain": "ltc1871ems-trpbf.step",
      "lbr": "ltc1871ems-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C459892",
      "digikey": "LTC1871EMS#TRPBFTR-ND",
      "mouser": "584-LTC1871EMS#TRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T00:45:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LTC1871EMS#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LTC1871EMS#TRPBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RUN",
        "type": "input",
        "description": "Enable pin with a falling threshold nominally 1.248V and 100mV of hysteresis; below the threshold the IC shuts down with VIN supply current typically 10μA, and the absolute maximum voltage on this pin is 7V."
      },
      {
        "number": "2",
        "name": "ITH",
        "type": "passive",
        "description": "Error amplifier compensation pin whose voltage sets the current comparator input threshold, with a nominal range of 0V to 1.40V."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input that receives the voltage from the external output resistor divider, with a nominal regulated voltage of 1.230V."
      },
      {
        "number": "4",
        "name": "FREQ",
        "type": "input",
        "description": "A resistor from this pin to ground programs the operating frequency over 50kHz to 1000kHz, with a nominal pin voltage of 0.6V."
      },
      {
        "number": "5",
        "name": "MODE/SYNC",
        "type": "input",
        "description": "Ground selects Burst Mode operation, while a DC level above 2V or INTVCC disables it for continuous operation; an external clock above 2V for at least 25ns synchronizes the oscillator."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the IC."
      },
      {
        "number": "7",
        "name": "GATE",
        "type": "output",
        "description": "Gate driver output for the external N-channel power MOSFET, with absolute maximum voltage of -0.3V to VINTVCC + 0.3V."
      },
      {
        "number": "8",
        "name": "INTVCC",
        "type": "power_out",
        "description": "Internal 5.20V regulator output powering the gate driver and control circuits, which must be decoupled locally to IC ground with a minimum of 4.7μF low-ESR capacitor; output current absolute maximum is 50mA."
      },
      {
        "number": "9",
        "name": "VIN",
        "type": "power_in",
        "description": "Main supply pin with a wide input range of 2.5V to 36V (absolute maximum 36V), which must be closely decoupled to ground."
      },
      {
        "number": "10",
        "name": "SENSE",
        "type": "input",
        "description": "Current sense input connected to the power MOSFET drain for VDS sensing or to a source resistor, with absolute maximum pin voltage of 36V."
      }
    ],
    "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: Pin-number-to-name mapping was taken from the TOP VIEW diagram text on page 2 (pins 1-5 down the lef; Pin types are assigned from KiCad ERC classes based on pin function descriptions; ITH (compensation "
        ],
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        "cost_usd": 0.0526,
        "at": "2026-10-18T00:44:06"
      },
      "datasheet": {
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        "pages": 36,
        "sha256": "5b84261840bec987",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 10,
        "described": 10,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ltc1871ems-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b8f88eac3ce221c2ccb0b5048f9ad49c2ef4af148f8ae50c4e232e357683f547",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "MSOP-10",
      "Category": "Power Management (PMIC)",
      "Pins": "10"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5b84261840bec9873329e93db1a783981338af0a32730903f00700dea35d09f2",
      "rows": [
        {
          "name": "Minimum Input Voltage",
          "symbol": "VIN(MIN)",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Falling RUN Input Threshold Voltage",
          "symbol": "VRUN–",
          "kind": "electrical",
          "unit": "V",
          "min": 1.223,
          "typ": 1.248,
          "max": 1.273,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Falling RUN Input Threshold Voltage",
          "symbol": "VRUN–",
          "kind": "electrical",
          "unit": "V",
          "min": 1.198,
          "typ": null,
          "max": 1.298,
          "conditions": "Full operating temperature range (●)",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "RUN Pin Input Threshold Hysteresis",
          "symbol": "VRUN(HYST)",
          "kind": "electrical",
          "unit": "mV",
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          "typ": 100,
          "max": 150,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "RUN Input Current",
          "symbol": "IRUN",
          "kind": "electrical",
          "unit": "nA",
          "min": 1,
          "typ": null,
          "max": 60,
          "conditions": "",
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        },
        {
          "name": "Feedback Voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 1.218,
          "typ": 1.23,
          "max": 1.242,
          "conditions": "VITH = 0.2V (Note 5)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 1.212,
          "typ": null,
          "max": 1.248,
          "conditions": "VITH = 0.2V (Note 5); full operating temperature range (●)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "FB Pin Input Current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 18,
          "max": 60,
          "conditions": "VITH = 0.2V (Note 5)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVFB/ΔVIN",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.002,
          "max": 0.02,
          "conditions": "2.5V ≤ VIN ≤ 30V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVFB/ΔVITH",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": -0.1,
          "conditions": "VMODE/SYNC = 0V, VITH = 0.5V to 0.9V (Note 5); full operating temperature range (●)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "FB Pin Overvoltage Lockout",
          "symbol": "ΔVFB(OV)",
          "kind": "electrical",
          "unit": "%",
          "min": 2.5,
          "typ": 6,
          "max": 10,
          "conditions": "VFB(OV) – VFB(NOM) in Percent",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Current Sense Input Threshold",
          "symbol": "VSENSE(MAX)",
          "kind": "electrical",
          "unit": "mV",
          "min": 120,
          "typ": 150,
          "max": 180,
          "conditions": "Duty Cycle < 20%",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SENSE Pin Current (GATE High)",
          "symbol": "ISENSE(ON)",
          "kind": "electrical",
          "unit": "μA",
          "min": 35,
          "typ": null,
          "max": 50,
          "conditions": "VSENSE = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SENSE Pin Current (GATE Low)",
          "symbol": "ISENSE(OFF)",
          "kind": "electrical",
          "unit": "μA",
          "min": 0.1,
          "typ": null,
          "max": 5,
          "conditions": "VSENSE = 30V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 250,
          "typ": 300,
          "max": 350,
          "conditions": "RFREQ = 80k",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency Range",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 50,
          "typ": null,
          "max": 1000,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Duty Cycle",
          "symbol": "DMAX",
          "kind": "electrical",
          "unit": "%",
          "min": 87,
          "typ": 92,
          "max": 97,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Recommended Maximum Synchronized Frequency Ratio",
          "symbol": "fSYNC/fOSC",
          "kind": "electrical",
          "unit": "",
          "min": 1.25,
          "typ": null,
          "max": 1.3,
          "conditions": "fOSC = 300kHz (Note 6)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "MODE/SYNC Minimum Input Pulse Width",
          "symbol": "tSYNC(MIN)",
          "kind": "timing",
          "unit": "ns",
          "min": 25,
          "typ": null,
          "max": null,
          "conditions": "VSYNC = 0V to 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low Level MODE/SYNC Input Voltage",
          "symbol": "VIL(MODE)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High Level MODE/SYNC Input Voltage",
          "symbol": "VIH(MODE)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Regulator Output Voltage",
          "symbol": "VINTVCC",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": 5.2,
          "max": 5.4,
          "conditions": "VIN = 7.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Regulator Line Regulation (7.5V to 15V)",
          "symbol": "ΔVINTVCC/ΔVIN1",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 8,
          "max": 25,
          "conditions": "7.5V ≤ VIN ≤ 15V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Regulator Line Regulation (15V to 30V)",
          "symbol": "ΔVINTVCC/ΔVIN2",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 70,
          "max": 200,
          "conditions": "15V ≤ VIN ≤ 30V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Load Regulation",
          "symbol": "VLDO(LOAD)",
          "kind": "electrical",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": -0.2,
          "conditions": "0 ≤ IINTVCC ≤ 20mA, VIN = 7.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Regulator Dropout Voltage",
          "symbol": "VDROPOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 280,
          "conditions": "VIN = 5V, INTVCC Load = 20mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Supply Current in Shutdown (Bootstrap Mode)",
          "symbol": "IINTVCC",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 10,
          "max": 20,
          "conditions": "RUN = 0V, SENSE = 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "GATE Driver Output Rise Time",
          "symbol": "tr",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 17,
          "max": 100,
          "conditions": "CL = 3300pF (Note 7)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "GATE Driver Output Fall Time",
          "symbol": "tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 8,
          "max": 100,
          "conditions": "CL = 3300pF (Note 7)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage Supply Current, Continuous Mode",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 550,
          "max": 1000,
          "conditions": "VMODE/SYNC = 5V, VFB = 1.4V, VITH = 0.75V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage Supply Current, Burst Mode Operation, No Load",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 250,
          "max": 500,
          "conditions": "VMODE/SYNC = 0V, VITH = 0.2V (Note 5)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage Supply Current, Shutdown Mode",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 10,
          "max": 20,
          "conditions": "VRUN = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (absolute maximum) VIN",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Voltage",
          "symbol": "VINTVCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "INTVCC Output Current",
          "symbol": "IINTVCC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "GATE Voltage",
          "symbol": "VGATE",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as VINTVCC + 0.3V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ITH, FB Voltages",
          "symbol": "VITH, VFB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 2.7,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "RUN, MODE/SYNC Voltages",
          "symbol": "VRUN, VMODE/SYNC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "FREQ Voltage",
          "symbol": "VFREQ",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 1.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "SENSE Pin Voltage",
          "symbol": "VSENSE",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range, LTC1871E",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "LTC1871E; guaranteed performance 0°C to 85°C per Note 2",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature, LTC1871E",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "LTC1871E/LTC1871I",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering)",
          "symbol": "TLEAD",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "10 sec soldering",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 120,
          "max": null,
          "conditions": "10-lead MSOP package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Falling RUN Input Threshold Voltage (reference)",
          "symbol": "VRUN+",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.348,
          "max": null,
          "conditions": "Rising RUN input threshold voltage",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Error Amplifier Transconductance",
          "symbol": "gm",
          "kind": "electrical",
          "unit": "μmho",
          "min": null,
          "typ": 650,
          "max": null,
          "conditions": "ITH Pin Load = ±5μA (Note 5)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Burst Mode Operation ITH Pin Voltage",
          "symbol": "VITH(BURST)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.3,
          "max": null,
          "conditions": "ITH voltage falling (Note 5)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Nominal FREQ Pin Voltage",
          "symbol": "VFREQ",
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