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Ray Set visibility: public 05b47f1 7d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "ltc4218ign-trpbf",
  "title": "LTC4218IGN#TRPBF",
  "brief": "Analog Devices Surge Protection Devices (SPDs), SSOP-16-150mil. 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",
    "circuit protection",
    "ltc4218ign#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ltc4218ign-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          6.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 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": [
          7.8,
          6.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3cc7780fe768be8a9f5c812d442cf747f35332a3358c67e8b82a0e342b6254ae",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "SSOP-16-150mil",
      "Category": "Circuit Protection",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "427d5758f9234b2abc8ff3592cdd06469fcc69819683639658600d8c78a80e32",
      "rows": [
        {
          "name": "Input Supply Range",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": 2.9,
          "typ": null,
          "max": 26.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Supply Undervoltage Lockout",
          "symbol": "VDD(UVL)",
          "kind": "electrical",
          "unit": "V",
          "min": 2.65,
          "typ": 2.73,
          "max": 2.85,
          "conditions": "VDD Rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit Sense Voltage Threshold (VSENSE+ – VSENSE–)",
          "symbol": "ΔVSNS(TH)",
          "kind": "electrical",
          "unit": "mV",
          "min": 14.25,
          "typ": 15,
          "max": 15.75,
          "conditions": "VFB = 1.23V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit Sense Voltage Threshold (VSENSE+ – VSENSE–)",
          "symbol": "ΔVSNS(TH)",
          "kind": "electrical",
          "unit": "mV",
          "min": 2.8,
          "typ": 3.75,
          "max": 4.7,
          "conditions": "VFB = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit Sense Voltage Threshold (VSENSE+ – VSENSE–)",
          "symbol": "ΔVSNS(TH)",
          "kind": "electrical",
          "unit": "mV",
          "min": 6.7,
          "typ": 7.5,
          "max": 8.325,
          "conditions": "VFB = 1.23V, RSET = 20kΩ",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SENSE– Input Current",
          "symbol": "ISENSE–(IN)",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
          "typ": 4,
          "max": 10,
          "conditions": "VSENSE– = 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SENSE+ Input Current",
          "symbol": "ISENSE+(IN)",
          "kind": "electrical",
          "unit": "µA",
          "min": -20,
          "typ": 5.5,
          "max": 20,
          "conditions": "VSENSE+ = 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "External N-Channel Gate Drive (VGATE – VSOURCE)",
          "symbol": "ΔVGATE",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": 6.15,
          "max": 6.5,
          "conditions": "VDD = 2.9V to 26.5V (Note 3), IGATE = 0, –1µA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Gate High Threshold (VGATE – VSOURCE)",
          "symbol": "ΔVGATE-HIGH(TH)",
          "kind": "electrical",
          "unit": "V",
          "min": 3.5,
          "typ": 4.2,
          "max": 4.8,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "External N-Channel Gate Pull-Up Current",
          "symbol": "IGATE(UP)",
          "kind": "electrical",
          "unit": "µA",
          "min": -29,
          "typ": -24,
          "max": -19,
          "conditions": "Gate Drive On, VGATE = VSOURCE = 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "External N-Channel Gate Fast Pull-Down Current",
          "symbol": "IGATE(FST)",
          "kind": "electrical",
          "unit": "mA",
          "min": 100,
          "typ": 170,
          "max": 220,
          "conditions": "Fast Turn Off, VGATE = 18V, VSOURCE = 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "External N-Channel Gate Pull-Down Current",
          "symbol": "IGATE(DN)",
          "kind": "electrical",
          "unit": "µA",
          "min": 200,
          "typ": 250,
          "max": 400,
          "conditions": "Gate Drive Off, VGATE = 18V, VSOURCE = 12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "OV, UV, FB Input Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": 0,
          "max": 1,
          "conditions": "VPIN = 1.2V, LTC4218 Only",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "OV, UV, FB Threshold Voltage",
          "symbol": "V(TH)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.21,
          "typ": 1.235,
          "max": 1.26,
          "conditions": "VPIN Rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "OV Hysteresis",
          "symbol": "ΔVOV(HYST)",
          "kind": "electrical",
          "unit": "mV",
          "min": 10,
          "typ": 20,
          "max": 30,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "UV Hysteresis",
          "symbol": "ΔVUV(HYST)",
          "kind": "electrical",
          "unit": "mV",
          "min": 50,
          "typ": 80,
          "max": 110,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "UV Reset Threshold Voltage",
          "symbol": "VUV(RTH)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.55,
          "typ": 0.62,
          "max": 0.7,
          "conditions": "VUV Falling",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "FB Power Good Hysteresis",
          "symbol": "ΔVFB(HYST)",
          "kind": "electrical",
          "unit": "mV",
          "min": 10,
          "typ": 20,
          "max": 30,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ISET Internal Resistor",
          "symbol": "RISET",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 19.5,
          "typ": 20,
          "max": 20.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SOURCE Input Current",
          "symbol": "ISOURCE",
          "kind": "electrical",
          "unit": "µA",
          "min": 1,
          "typ": 2,
          "max": 4,
          "conditions": "VSOURCE = VGATE = 12V, LTC4218 Only",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SOURCE Input Current",
          "symbol": "ISOURCE",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": 0,
          "max": 1,
          "conditions": "VSOURCE = VGATE = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TIMER High Threshold",
          "symbol": "VTIMER(H)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.235,
          "max": 1.28,
          "conditions": "VTIMER Rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TIMER Low Threshold",
          "symbol": "VTIMER(L)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.1,
          "typ": 0.21,
          "max": 0.3,
          "conditions": "VTIMER Falling",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TIMER Pull Up Current",
          "symbol": "ITIMER(UP)",
          "kind": "electrical",
          "unit": "µA",
          "min": -120,
          "typ": -100,
          "max": -80,
          "conditions": "VTIMER = 0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TIMER Pull-Down Current",
          "symbol": "ITIMER(DN)",
          "kind": "electrical",
          "unit": "µA",
          "min": 1.4,
          "typ": 2,
          "max": 2.6,
          "conditions": "VTIMER = 1.2V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "TIMER Current Ratio",
          "symbol": "ITIMER(RATIO)",
          "kind": "electrical",
          "unit": "%",
          "min": 1.6,
          "typ": 2,
          "max": 2.7,
          "conditions": "ITIMER(DN)/ITIMER(UP)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "IMON Full-Scale Output Current",
          "symbol": "IMON(FS)",
          "kind": "electrical",
          "unit": "µA",
          "min": 94,
          "typ": 100,
          "max": 106,
          "conditions": "VSENSE+ – VSENSE– = 15mV",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "IMON Offset Current",
          "symbol": "IMON(OFF)",
          "kind": "electrical",
          "unit": "µA",
          "min": -6,
          "typ": 0,
          "max": 6,
          "conditions": "VSENSE+ – VSENSE– = 1mV",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "IMON Gain",
          "symbol": "GIMON",
          "kind": "electrical",
          "unit": "µA/mV",
          "min": 6.47,
          "typ": 6.67,
          "max": 6.87,
          "conditions": "VSENSE+ – VSENSE– = 15mV and 1mV",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PG, FLT Output Low Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.4,
          "max": 0.8,
          "conditions": "ISINK = 2mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PG, FLT Input Leakage Current",
          "symbol": "IOH",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
          "typ": 0,
          "max": 10,
          "conditions": "V = 30V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Supply Current",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.6,
          "max": 5,
          "conditions": "FET On",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input High (OV), Input Low (UV) to GATE Low Propagation Delay",
          "symbol": "tPHL(GATE)",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 3,
          "max": 5,
          "conditions": "VGATE < 16.5V Falling",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VSENSE+ – VSENSE– High to GATE Low Propagation Delay",
          "symbol": "tPHL(SENSE)",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "VFB = 0, Step (VSENSE+ – VSENSE–) to 60mV, CGATE = 1.5nF, VGATE < 16.5V Falling",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Turn-On Delay",
          "symbol": "tD(ON)",
          "kind": "timing",
          "unit": "ms",
          "min": 50,
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