LT3573IMSE#TRPBF

{
  "slug": "lt3573imse-trpbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices AC-DC Controllers And Regulators, MSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lt3573imse#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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    "README.md",
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    "lt3573imse-trpbf.kicad_mod",
    "lt3573imse-trpbf.glb",
    "lt3573imse-trpbf.step",
    "lt3573imse-trpbf.lbr",
    "docs/hero.png",
    "docs/lt3573imse-trpbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lt3573imse-trpbf-hero.glb",
    "lt3573imse-trpbf-hero.overlay.json",
    "lt3573imse-trpbf-etched.glb"
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  "component": {
    "mpn": "LT3573IMSE#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "MSOP-16-EP",
    "pin_count": 17,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588949997840158720",
    "parts": {
      "symbol": "lt3573imse-trpbf.kicad_sym",
      "footprint": "lt3573imse-trpbf.kicad_mod",
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      "model_3d_plain": "lt3573imse-trpbf-etched.glb",
      "model_3d_step": "lt3573imse-trpbf-etched.step",
      "model_3d_step_plain": "lt3573imse-trpbf.step",
      "lbr": "lt3573imse-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C670933",
      "digikey": "LT3573IMSE#TRPBFTR-ND",
      "mouser": "584-LT3573IMSE#TRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T01:30:42Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LT3573IMSE#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT3573IMSE#TRPBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the LT3573 control and power circuitry."
      },
      {
        "number": "2",
        "name": "TEST",
        "type": "input",
        "description": "Test pin used for testing only, which must be connected to ground for the part to operate properly."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the LT3573 control and power circuitry."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "output",
        "description": "Collector node of the integrated 1.25A, 60V NPN output switch that carries large currents, so its traces should be kept as short as possible; SW absolute maximum is 60V."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin for start-up circuitry and the reference for the DCM comparator and feedback; operates from 3V to 40V and must be locally bypassed with a capacitor."
      },
      {
        "number": "6",
        "name": "BIAS",
        "type": "power_in",
        "description": "Supplies current to the switch driver and internal circuitry, regulated to 2.9V to 3.1V at 30mA, and must be locally bypassed; it may tie to VIN only if no third winding is used and VIN is 15V or less."
      },
      {
        "number": "7",
        "name": "SHDN/UVLO",
        "type": "input",
        "description": "Shutdown and undervoltage lockout pin, where a resistor divider from VIN sets the minimum operating input voltage; the rising threshold is 1.15V to 1.29V (1.22V typ) with 2.5µA hysteresis current, and the absolute maximum is 40V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the LT3573 control and power circuitry."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the LT3573 control and power circuitry."
      },
      {
        "number": "10",
        "name": "TC",
        "type": "passive",
        "description": "Output voltage temperature compensation pin, where a resistor to ground sets a PTAT current ITC = 0.55V/RTC sourced into RREF; the absolute maximum is 5V."
      },
      {
        "number": "11",
        "name": "RREF",
        "type": "passive",
        "description": "External ground-referred reference resistor pin, nominally about 6k though not required to be exact, with an absolute maximum of 5V."
      },
      {
        "number": "12",
        "name": "RFB",
        "type": "input",
        "description": "External feedback resistor input connected to the transformer primary (VSW), carrying about 200µA average during flyback; the absolute maximum is 40V."
      },
      {
        "number": "13",
        "name": "VC",
        "type": "passive",
        "description": "Compensation pin for the internal error amplifier, requiring a series RC to ground and an optional 100pF capacitor in parallel; the absolute maximum is 5V."
      },
      {
        "number": "14",
        "name": "RILIM",
        "type": "passive",
        "description": "Maximum current limit adjust pin, where a resistor to ground sets the switch current limit and a 10k resistor gives full switch current capability (1.25A min, 1.55A typ, 1.85A max); the absolute maximum is 5V."
      },
      {
        "number": "15",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start pin, where a capacitor limits start-up inrush current and output voltage ramp rate, and switching begins when the voltage reaches about 0.7V; the absolute maximum is 5V."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the LT3573 control and power circuitry."
      },
      {
        "number": "17",
        "name": "EXPOSED PAD",
        "type": "power_in",
        "description": "Exposed pad is ground and must be soldered to the board and connected with many vias to an internal ground plane for electrical contact and thermal performance."
      }
    ],
    "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 MSOP top-view pin-to-label mapping was reconstructed from a scrambled text extraction of the pin; BIAS is typed power_in, but the datasheet describes it as a regulated ~3V internal rail that can be ; The datasheet describes the pin functions but does not give a KiCad type for each pin. SW is typed o",
          "5/17 pins cited to the wrong page (name found elsewhere): ['11:RREF@p5', '13:VC@p5', '14:RILIM@p5', '16:GND@p5']"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0484,
        "at": "2026-10-21T01:27:18"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588949997840158720",
        "pages": 26,
        "sha256": "3f66b761923d7550",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "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": "e807f0e0e2c0c408c18dc198f4fc826ff019157c0529c7e78e68c1aab270d826",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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        "sha256": "3999bd6aa696a6299480c32e6608ce3ca6b4bbc146baa6f3c13e48981878e891",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}