LTC4418CUF#TRPBF

{
  "slug": "ltc4418cuf-trpbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Power Distribution Switches, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "ltc4418cuf#trpbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ltc4418cuf-trpbf.kicad_sym",
    "ltc4418cuf-trpbf.kicad_mod",
    "ltc4418cuf-trpbf.glb",
    "ltc4418cuf-trpbf.step",
    "ltc4418cuf-trpbf.lbr",
    "docs/hero.png",
    "docs/ltc4418cuf-trpbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ltc4418cuf-trpbf-hero.glb",
    "ltc4418cuf-trpbf-hero.overlay.json",
    "ltc4418cuf-trpbf-etched.glb"
  ],
  "component": {
    "mpn": "LTC4418CUF#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "Power Distribution Switches",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588916782115794944",
    "parts": {
      "symbol": "ltc4418cuf-trpbf.kicad_sym",
      "footprint": "ltc4418cuf-trpbf.kicad_mod",
      "model_3d": "ltc4418cuf-trpbf-hero.glb",
      "model_3d_plain": "ltc4418cuf-trpbf-etched.glb",
      "model_3d_step": "ltc4418cuf-trpbf-etched.step",
      "model_3d_step_plain": "ltc4418cuf-trpbf.step",
      "lbr": "ltc4418cuf-trpbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C688512",
      "digikey": "LTC4418CUF#TRPBFTR-ND",
      "mouser": "584-LTC4418CUFTRPBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T21:03:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LTC4418CUF#TRPBFTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LTC4418CUFTRPBF",
        "status": "found",
        "lifecycle": "Restricted Availability"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TMR",
        "type": "passive",
        "description": "Validation timer pin: a capacitor of at least 100pF between TMR and GND sets a validation time of 16ms/nF for both channels, connecting TMR to INTVCC gives a 3.5µs minimum (Fast Mode), and it must not be left open."
      },
      {
        "number": "2",
        "name": "UV1",
        "type": "input",
        "description": "Channel 1 undervoltage comparator input; falling voltages below 1V (VTH) invalidate the V1 supply, and unused pins must be connected to ground."
      },
      {
        "number": "3",
        "name": "OV1",
        "type": "input",
        "description": "Channel 1 overvoltage comparator input; rising voltages above 1V (VTH) invalidate the V1 supply, and unused pins must be connected to ground."
      },
      {
        "number": "4",
        "name": "UV2",
        "type": "input",
        "description": "Channel 2 undervoltage comparator input; falling voltages below 1V (VTH) invalidate the V2 supply, and unused pins must be connected to ground."
      },
      {
        "number": "5",
        "name": "OV2",
        "type": "input",
        "description": "Channel 2 overvoltage comparator input; rising voltages above 1V (VTH) invalidate the V2 supply, and unused pins must be connected to ground."
      },
      {
        "number": "6",
        "name": "VALID1",
        "type": "output",
        "description": "40V-rated open-drain output that pulls low when V1 has been within its OV/UV window for at least the validation time, and must be left open when not used."
      },
      {
        "number": "7",
        "name": "VALID2",
        "type": "output",
        "description": "40V-rated open-drain output that pulls low when V2 has been within its OV/UV window for at least the validation time, and must be left open when not used."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground."
      },
      {
        "number": "9",
        "name": "CAS",
        "type": "output",
        "description": "Cascade output pulled up to INTVCC by a 20µA internal source, can be pulled up to as high as 5.5V independent of the input supplies, and must be left open if not used."
      },
      {
        "number": "10",
        "name": "INTVCC",
        "type": "power_out",
        "description": "Internal low-voltage supply decoupling output; no external load current may be drawn from it, and a 0.1µF capacitor to GND is required."
      },
      {
        "number": "11",
        "name": "G2",
        "type": "output",
        "description": "Channel 2 P-channel MOSFET gate drive output, clamped 6.2V (ΔVG) below VS2 when driven low."
      },
      {
        "number": "12",
        "name": "VS2",
        "type": "input",
        "description": "Channel 2 common-source connection of the external P-channel MOSFETs used to monitor the gate drive reference; connect to ground when the channel is not used."
      },
      {
        "number": "13",
        "name": "G1",
        "type": "output",
        "description": "Channel 1 P-channel MOSFET gate drive output, clamped 6.2V (ΔVG) below VS1 when driven low."
      },
      {
        "number": "14",
        "name": "VS1",
        "type": "input",
        "description": "Channel 1 common-source connection of the external P-channel MOSFETs used to monitor the gate drive reference; connect to ground when the channel is not used."
      },
      {
        "number": "15",
        "name": "VOUT",
        "type": "power_out",
        "description": "Output voltage supply and sense pin that powers most internal circuitry above 2.475V and blocks any input from connecting unless VOUT is at least 125mV (VREV) below that input."
      },
      {
        "number": "16",
        "name": "V2",
        "type": "power_in",
        "description": "Lower-priority input supply that connects to VOUT through its external P-channel MOSFETs only when V2 is valid and V1 is not; connect to ground when not used."
      },
      {
        "number": "17",
        "name": "V1",
        "type": "power_in",
        "description": "Higher-priority input supply that connects to VOUT through its external P-channel MOSFETs when V1 is within its user-defined OV/UV window for the validation time."
      },
      {
        "number": "18",
        "name": "EN",
        "type": "input",
        "description": "40V channel enable input; driving it below 1V (VEN(TH)) turns off both external MOSFETs, it is pulled to INTVCC by a 3.2µA source, and it must be connected to INTVCC when not used."
      },
      {
        "number": "19",
        "name": "SHDN",
        "type": "input",
        "description": "40V shutdown input; driving it below VSHDN(TH) turns off all external MOSFETs and resets the validation timers, it is pulled to INTVCC by a 3.2µA source, and it must be connected to INTVCC when not used."
      },
      {
        "number": "20",
        "name": "HYS",
        "type": "input",
        "description": "OV/UV comparator hysteresis input; grounding it selects fixed internal hysteresis, while a resistor to GND sets a 63mV/RHYS hysteresis current, and it must be connected to GND if not used."
      },
      {
        "number": "21",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad is device ground and may be left open or connected to device ground."
      }
    ],
    "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 1 (TMR) is classed as passive because it is a timing capacitor node. Confirm the classification ; VOUT is both the output of the power path and the supply for internal circuitry. It is classed here ; The pin-configuration drawing text is scrambled in the extracted datasheet. Pin numbers were taken f"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0575,
        "at": "2026-10-20T20:58:13"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588916782115794944",
        "pages": 30,
        "sha256": "e98468bf3fcc3e4d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "ltc4418cuf-trpbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ltc4418cuf-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": "e173a0b98a94a89bc488e268a0bb367adcdd5c1a3090e14612e94d7256bd2d60",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}