LT4363IMS-2#TRPBF

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  "slug": "lt4363ims-2-trpbf",
  "title": "LT4363IMS-2#TRPBF",
  "brief": "Analog Devices Surge Protection Devices (SPDs), MSOP-12. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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  "component": {
    "mpn": "LT4363IMS-2#TRPBF",
    "manufacturer": "Analog Devices",
    "package": "MSOP-12",
    "pin_count": 12,
    "category": "Circuit Protection",
    "subcategory": "Surge Protection Devices (SPDs)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886309565423616",
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    "pins": [
      {
        "number": "1",
        "name": "FB",
        "type": "input",
        "description": "Voltage regulator feedback input. Connect to the center tap of the resistive divider from OUT to GND; during an overvoltage event, GATE is controlled to maintain 1.275V at FB. Connect FB to GND to disable the OV clamp."
      },
      {
        "number": "2",
        "name": "OUT",
        "type": "input",
        "description": "Output voltage sense input. Senses the voltage at the source of the external N-channel MOSFET. The difference (VCC - OUT) sets the fault timer current; when this difference drops below 0.5V the ENOUT pin goes high impedance."
      },
      {
        "number": "3",
        "name": "SNS",
        "type": "input",
        "description": "Current sense input. Connect to the input of the current sense resistor. The internal current limit amplifier controls GATE to limit the SNS-to-OUT voltage to 50mV (25mV in severe fault when OUT is below 2V)."
      },
      {
        "number": "4",
        "name": "GATE",
        "type": "output",
        "description": "N-channel MOSFET gate drive output. Pulled up by an internal charge pump (typ. -30uA) to ~13V above OUT; a 14V internal clamp limits the drive during faults. Both the voltage and current amplifiers control GATE to regulate OUT and limit load current."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage input. Normal operation 4V to 80V; can be pulled below ground by up to 60V during reverse-battery without damage. Pulling SHDN low reduces supply current to ~7uA."
      },
      {
        "number": "6",
        "name": "SHDN",
        "type": "input",
        "description": "Active-low shutdown control input. Pulling below the 0.4V threshold shuts the part down to a low-current mode; pull above 2.1V (or disconnect) to enable. Withstands up to 100V above GND or -60V below GND."
      },
      {
        "number": "7",
        "name": "OV",
        "type": "input",
        "description": "Overvoltage comparator input (LT4363-2 only). When OV is above its 1.275V threshold the fault retry function is inhibited even after the TMR pin has cycled; GATE is allowed to turn back on when OV falls below the hysteretic threshold. Connect to GND if unused."
      },
      {
        "number": "8",
        "name": "UV",
        "type": "input",
        "description": "Undervoltage comparator input. When UV is below the 1.275V threshold, GATE is pulled down with ~1mA; when UV rises above the threshold plus hysteresis, the internal charge pump is enabled and GATE rises. Connect to VCC if unused."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground."
      },
      {
        "number": "10",
        "name": "FLT",
        "type": "output",
        "description": "Open-collector fault output (active-low). Pulls low when TMR reaches 1.275V, warning that the pass MOSFET is about to be turned off due to overvoltage (voltage fault) or overcurrent. Internal NPN sinks up to 2mA."
      },
      {
        "number": "11",
        "name": "ENOUT",
        "type": "output",
        "description": "Open-collector enable output. Goes high impedance when OUT is within 0.5V of VCC and >=3V above GND, indicating the external MOSFET is fully on. State is latched until OUT drops below 2V, resetting the latch. Internal NPN sinks up to 2mA."
      },
      {
        "number": "12",
        "name": "TMR",
        "type": "passive",
        "description": "Fault timer input. Connect a capacitor (>=10nF) between this pin and GND to set the early warning, fault turn-off and cool-down times. Charging current during a fault depends on VCC - OUT and is roughly 5x larger for overcurrent than for overvoltage; thresholds 1.275V (warning), 1.375V (gate off), 0.5V (retry, LT4363-2)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
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  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "MSOP-12",
      "Category": "Circuit Protection",
      "Pins": "12"
    }
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      "mpn": "LT4363IMS-2#TRPBFCMS-2",
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      "mpn": "LT4363IMS-2#TRPBFCDE-2",
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      "mpn": "LT4363IMS-2#TRPBFIDE-2",
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      "mpn": "LT4363IMS-2#TRPBFIS-2",
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  "discovery_pitch": "LT4363IMS-2#TRPBF (Analog Devices) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-28T18:13:04.405Z"
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