LTC4218IGN#TRPBF

{
  "slug": "ltc4218ign-trpbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Surge Protection Devices (SPDs), SSOP-16-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "ltc4218ign#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "ltc4218ign-trpbf.kicad_sym",
    "ltc4218ign-trpbf.kicad_mod",
    "ltc4218ign-trpbf.glb",
    "ltc4218ign-trpbf.step",
    "ltc4218ign-trpbf.lbr",
    "docs/hero.png",
    "docs/ltc4218ign-trpbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ltc4218ign-trpbf-hero.glb",
    "ltc4218ign-trpbf-hero.overlay.json",
    "ltc4218ign-trpbf-etched.glb"
  ],
  "component": {
    "mpn": "LTC4218IGN#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "SSOP-16-150mil",
    "pin_count": 16,
    "category": "Circuit Protection",
    "subcategory": "Surge Protection Devices (SPDs)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922718914301952",
    "parts": {
      "symbol": "ltc4218ign-trpbf.kicad_sym",
      "footprint": "ltc4218ign-trpbf.kicad_mod",
      "model_3d": "ltc4218ign-trpbf-hero.glb",
      "model_3d_plain": "ltc4218ign-trpbf-etched.glb",
      "model_3d_step": "ltc4218ign-trpbf-etched.step",
      "model_3d_step_plain": "ltc4218ign-trpbf.step",
      "lbr": "ltc4218ign-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C687480"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T17:06:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SENSE+",
        "type": "input",
        "description": "Current sense plus input, connected to the VDD side of the current sense resistor; the current limit holds the SENSE+ to SENSE- voltage to 15mV or less depending on the FB voltage."
      },
      {
        "number": "2",
        "name": "SENSE–",
        "type": "input",
        "description": "Current sense minus input, connected to the side of the current sense resistor opposite VDD; the current limit holds the SENSE+ to SENSE- voltage to 15mV or less depending on the FB voltage."
      },
      {
        "number": "3",
        "name": "ISET",
        "type": "passive",
        "description": "Current limit adjustment pin; leave open for the 15mV threshold, keep any RSET resistor no less than 2kΩ due to circuit tolerance, and place a 0.1µF capacitor to ground when a board trace connects to this pin."
      },
      {
        "number": "4",
        "name": "IMON",
        "type": "output",
        "description": "Current monitor output that sources 6.67µA/mV of sense voltage, giving a 0V to 2V swing with a 20kΩ resistor to GND for a 0mV to 15mV sense voltage, with compliance from 0V to INTVCC - 0.7V."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Foldback and power good comparator input; below 0.6V the current limit is reduced, and below 1.21V the PG pin pulls low on the adjustable LTC4218."
      },
      {
        "number": "6",
        "name": "FLT",
        "type": "output",
        "description": "Open-drain overcurrent fault indicator that pulls low when the circuit breaker trips, and is tied to UV for overcurrent auto-retry."
      },
      {
        "number": "7",
        "name": "PG",
        "type": "output",
        "description": "Open-drain power good indicator that pulls low when FB falls below 1.21V and releases high once FB rises above 1.23V and GATE-to-SOURCE exceeds 4.2V."
      },
      {
        "number": "8",
        "name": "GATE",
        "type": "output",
        "description": "Gate drive for the external N-channel MOSFET, charged by a 24µA current source, pulled down by 250µA during UV/OV turn-off and by 170mA during a short circuit or undervoltage lockout."
      },
      {
        "number": "9",
        "name": "SOURCE",
        "type": "passive",
        "description": "N-channel MOSFET source connection, which connects to the source of the external MOSFET and provides the return for the gate pull-down circuit."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground."
      },
      {
        "number": "11",
        "name": "INTVCC",
        "type": "power_out",
        "description": "Internal 3.1V supply decoupling output that requires a 1µF or larger capacitor, and overloading this pin can disrupt internal operation."
      },
      {
        "number": "12",
        "name": "TIMER",
        "type": "passive",
        "description": "Timer input; a capacitor to ground sets a 12ms/µF current-limit duration before the switch turns off, with a 1.2V high threshold and 0.2V low threshold."
      },
      {
        "number": "13",
        "name": "OV",
        "type": "input",
        "description": "Overvoltage comparator input; if the voltage rises above 1.235V the switch turns off, and the pin must be tied to GND if unused."
      },
      {
        "number": "14",
        "name": "UV",
        "type": "input",
        "description": "Undervoltage comparator input; the switch turns off when the voltage falls below 1.15V, pulling it below 0.62V resets an overcurrent fault, and it must be tied high if unused."
      },
      {
        "number": "15",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input with an operating range of 2.9V to 26.5V and an undervoltage lockout threshold of 2.73V."
      },
      {
        "number": "16",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      }
    ],
    "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 for the GN (SSOP) package was taken from the TOP VIEW figure text on page; Electrical type for ISET, SOURCE and TIMER is not stated in the datasheet; 'passive' was chosen as t; FLT and PG are open-drain outputs and GATE is a driven output; KiCad has no open-drain class in this"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0821,
        "at": "2026-10-18T17:06:28"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922718914301952",
        "pages": 18,
        "sha256": "427d5758f9234b2a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d0e11e46aeca5dbaa5c4bb538f3f4899761267cabdeba6486325ae9e979c03ef",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ltc4218ign-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": "3cc7780fe768be8a9f5c812d442cf747f35332a3358c67e8b82a0e342b6254ae",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}