LT8609EMSE#TRPBF

{
  "schema_version": 1,
  "type": "component",
  "slug": "lt8609emse-trpbf",
  "title": "LT8609EMSE#TRPBF",
  "brief": "Analog Devices DC-DC Converters, MSOP-10-EP. 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)",
    "lt8609emse#trpbf",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "LT8609EMSE#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "MSOP-10-EP",
    "pin_count": 11,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588908319393767424",
    "parts": {
      "symbol": "lt8609emse-trpbf.kicad_sym",
      "footprint": "lt8609emse-trpbf.kicad_mod",
      "model_3d": "lt8609emse-trpbf-hero.glb",
      "model_3d_plain": "lt8609emse-trpbf-etched.glb",
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      "model_3d_step_plain": "lt8609emse-trpbf.step",
      "lbr": "lt8609emse-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C459916",
      "digikey": "LT8609EMSE#TRPBFTR-ND",
      "mouser": "584-LT8609EMSE#TRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T01:28:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LT8609EMSE#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT8609EMSE#TRPBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BST",
        "type": "power_out",
        "description": "Provides a drive voltage higher than the input voltage to the topside power switch, and a 0.1µF boost capacitor must be placed as close as possible to the IC with no series resistor."
      },
      {
        "number": "2",
        "name": "SW",
        "type": "output",
        "description": "Output of the internal power switches that connects to the inductor and boost capacitor, and this node should be kept small on the PCB for good performance."
      },
      {
        "number": "3",
        "name": "INTVCC",
        "type": "power_out",
        "description": "Internal 3.5V regulator bypass pin that powers the internal drivers and control circuits, with a maximum output current of 20mA, a voltage that varies between 2.8V and 3.5V, decoupling with at least 1µF low ESR ceramic, and no external loading."
      },
      {
        "number": "4",
        "name": "RT",
        "type": "passive",
        "description": "A resistor is tied between RT and ground to set the switching frequency."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "input",
        "description": "External clock synchronization input: ground for low-ripple Burst Mode at low loads, tie to a clock to synchronize, leave floating for pulse-skipping mode without spread spectrum, and tie to INTVCC or to a voltage between 3.2V and 5.0V for pulse-skipping with spread spectrum."
      },
      {
        "number": "6",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin that the regulator holds at 0.782V, where the feedback resistor divider tap connects."
      },
      {
        "number": "7",
        "name": "TR/SS",
        "type": "input",
        "description": "Output tracking and soft-start pin: a voltage below 0.782V makes FB follow TR/SS, an internal 2µA pull-up from INTVCC sets the ramp with a capacitor, and the pin is pulled to ground through 300Ω during shutdown and faults (use a series resistor when driven from a low-impedance source)."
      },
      {
        "number": "8",
        "name": "PG",
        "type": "output",
        "description": "Open-drain power-good output that stays low until FB is within ±8.5% of the regulation voltage with no fault conditions, and is valid when VIN is above 3.2V regardless of the EN/UV state."
      },
      {
        "number": "9",
        "name": "VIN",
        "type": "power_in",
        "description": "Supplies the internal circuitry and the internal topside power switch and must be locally bypassed, with the input capacitor placed as close as possible to the VIN and GND pins."
      },
      {
        "number": "10",
        "name": "EN/UV",
        "type": "input",
        "description": "Shuts the part down when low and enables it when high, with a hysteretic threshold of 1.05V rising and 1.00V falling, and it should be tied to VIN if the shutdown feature is not used."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad that must be connected to the negative terminal of the input capacitor and soldered to the PCB to lower the thermal resistance."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin numbers are taken from the page 2 top view for the LT8609/LT8609A 10-lead MSE package, which is ; The ordering table on page 2 lists LT8609EMSE#TRPBF as a 10-Lead Plastic MSOP, so the MSE package wi; The datasheet does not state KiCad pin types. The types above are inferred from each pin's function,"
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        "cost_usd": 0.0614,
        "at": "2026-10-18T01:25:58"
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      "datasheet": {
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        "pages": 26,
        "sha256": "587a9fb33e1fb23a",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 11,
        "described": 11,
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  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "MSOP-10-EP",
      "Category": "Power Management (PMIC)",
      "Pins": "11"
    },
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          "name": "VIN, EN/UV, PG voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 42,
          "conditions": "Absolute maximum rating",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "FB, TR/SS voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "Absolute maximum rating",
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        },
        {
          "name": "SYNC Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
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          "conditions": "Absolute maximum rating",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "LT8609E/LT8609AE/LT8609BE (MSE package)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Minimum Input Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": 3,
          "max": 3.2,
          "conditions": "Over full operating temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VIN Quiescent Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 1,
          "max": 4,
          "conditions": "VEN/UV = 0V, VSYNC = 0V (LT8609/LT8609A)",
          "source_page": 3,
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        {
          "name": "VIN Quiescent Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 1.7,
          "max": 12,
          "conditions": "VEN/UV = 2V, Not Switching, VSYNC = 0V (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VIN Current in Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 46,
          "max": 90,
          "conditions": "VIN = 6V, VOUT = 2.7V, Output Load = 100µA (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VIN Current in Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 480,
          "max": 700,
          "conditions": "VIN = 6V, VOUT = 2.7V, Output Load = 1mA (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Reference Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 0.778,
          "typ": 0.782,
          "max": 0.786,
          "conditions": "VIN = 6V, ILOAD = 100mA (LT8609/LT8609A)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Reference Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 0.77,
          "typ": 0.782,
          "max": 0.794,
          "conditions": "VIN = 6V, ILOAD = 100mA (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Voltage Line Regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.02,
          "max": 0.04,
          "conditions": "VIN = 4.0V to 40V; over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Pin Input Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "VFB = 1V; over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum On-Time",
          "symbol": "",
          "kind": "timing",
          "unit": "ns",
          "min": 45,
          "typ": null,
          "max": 75,
          "conditions": "ILOAD = 1.5A, SYNC = 0V; over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum On-Time",
          "symbol": "",
          "kind": "timing",
          "unit": "ns",
          "min": 45,
          "typ": null,
          "max": 60,
          "conditions": "ILOAD = 1.5A, SYNC = 1.9V; over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum Off Time",
          "symbol": "",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 90,
          "max": 130,
          "conditions": "No conditions printed; column assignment of the two printed values inferred (see review)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "kHz",
          "min": 155,
          "typ": 200,
          "max": 245,
          "conditions": "RT = 221k, ILOAD = 0.5A (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Oscillator Frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "kHz",
          "min": 640,
          "typ": 700,
          "max": 760,
          "conditions": "RT = 60.4k, ILOAD = 0.5A (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "MHz",
          "min": 1.925,
          "typ": 2,
          "max": 2.075,
          "conditions": "RT = 18.2k, ILOAD = 0.5A (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Top Power NMOS Current Limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "A",
          "min": 3.4,
          "typ": 4.5,
          "max": 5.7,
          "conditions": "Over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "EN/UV Pin Threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 0.99,
          "typ": 1.05,
          "max": 1.11,
          "conditions": "EN/UV Rising; over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "EN/UV Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "VEN/UV = 2V (LT8609/LT8609A); over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PG Upper Threshold Offset from VFB",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 5,
          "typ": 8.5,
          "max": 13,
          "conditions": "LT8609/LT8609A: VFB Rising; over full temperature range (l)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PG Lower Threshold Offset from VFB",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 5,
          "typ": 8.5,
          "max": 13,
          "conditions": "LT8609/LT8609A: VFB Falling; over full temperature range (l)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PG Leakage",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": -200,
          "typ": null,
          "max": 200,
          "conditions": "VPG = 42V; over full temperature range (l)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PG Pull-Down Resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 550,
          "max": 1200,
          "conditions": "VPG = 0.1V; column assignment of the two printed values inferred (see review)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "TR/SS Source Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": 1,
          "typ": 2,
          "max": 3,
          "conditions": "Over full temperature range (l)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "TR/SS Pull-Down Resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 300,
          "max": 900,
          "conditions": "Fault Condition, TR/SS = 0.1V; column assignment of the two printed values inferred (see review)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Spread Spectrum Modulation Frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "kHz",
          "min": 1,
          "typ": 3,
          "max": 6,
          "conditions": "VSYNC = 3.3V (LT8609/LT8609A)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient (eJA)",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "MSE 10-lead plastic MSOP package; single printed value, entered as typ (see review)",
          "source_page": 2,
          "source": "datasheet"
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