LM5066IPMHX

{
  "slug": "lm5066ipmhx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Surge Suppressors, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "tvs-fuse-board level protection",
    "lm5066ipmhx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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  "component": {
    "mpn": "LM5066IPMHX",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-28",
    "pin_count": 29,
    "category": "TVS/Fuse/Board Level Protection",
    "subcategory": "Surge Suppressors",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm5066ipmhx.pdf",
    "parts": {
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      "lbr": "lm5066ipmhx.lbr"
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    "distributor_links": {
      "lcsc": "C2879316"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T16:41:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "input",
        "description": "Connects to the output rail (external MOSFET source) to set the MOSFET VDS for power limiting and to monitor the output voltage."
      },
      {
        "number": "2",
        "name": "GATE",
        "type": "output",
        "description": "Gate drive output that connects to the external MOSFET gate."
      },
      {
        "number": "3",
        "name": "SENSE",
        "type": "input",
        "description": "Current sense input; the voltage across RSNS is measured from VIN_K to this pin, and an overcurrent threshold limits load current and activates the fault timer."
      },
      {
        "number": "4",
        "name": "VIN_K",
        "type": "input",
        "description": "Positive supply Kelvin pin on which the input voltage is measured."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply connection for the device."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "7",
        "name": "UVLO/EN",
        "type": "input",
        "description": "External resistor divider sets the undervoltage turn-on threshold, with a nominal enable threshold of 2.48 V; the pin can also be used for remote shutdown control."
      },
      {
        "number": "8",
        "name": "OVLO",
        "type": "input",
        "description": "External resistor divider sets the overvoltage turn-off threshold, with a disable threshold of 2.46 V."
      },
      {
        "number": "9",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog device ground that connects to GND at the pin."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Circuit ground."
      },
      {
        "number": "11",
        "name": "SDAI",
        "type": "input",
        "description": "SMBus data input pin that connects to SDAO if unidirectional isolation devices are not required."
      },
      {
        "number": "12",
        "name": "SDAO",
        "type": "output",
        "description": "SMBus data output pin that connects to SDAI if unidirectional isolation devices are not required."
      },
      {
        "number": "13",
        "name": "SCL",
        "type": "input",
        "description": "Clock pin for the SMBus."
      },
      {
        "number": "14",
        "name": "SMBA",
        "type": "output",
        "description": "SMBus alert line, active low."
      },
      {
        "number": "15",
        "name": "VREF",
        "type": "power_in",
        "description": "Internally generated precision reference used for analog-to-digital conversion; connect a 1-µF capacitor to ground for bypassing."
      },
      {
        "number": "16",
        "name": "DIODE",
        "type": "passive",
        "description": "Connects to a diode-configured MMBT3904 NPN transistor for temperature monitoring."
      },
      {
        "number": "17",
        "name": "VAUX",
        "type": "input",
        "description": "Auxiliary pin for voltage telemetry from an external source with a full-scale input of 2.97 V."
      },
      {
        "number": "18",
        "name": "ADR2",
        "type": "tri_state",
        "description": "Tri-state SMBus address line that should be connected to GND, VDD, or left floating."
      },
      {
        "number": "19",
        "name": "ADR1",
        "type": "tri_state",
        "description": "Tri-state SMBus address line that should be connected to GND, VDD, or left floating."
      },
      {
        "number": "20",
        "name": "ADR0",
        "type": "tri_state",
        "description": "Tri-state SMBus address line that should be connected to GND, VDD, or left floating."
      },
      {
        "number": "21",
        "name": "VDD",
        "type": "power_out",
        "description": "Internally sub-regulated 4.85-V bias supply; connect a 1-µF capacitor to ground for bypassing."
      },
      {
        "number": "22",
        "name": "CL",
        "type": "input",
        "description": "Connect to GND or leave floating for a nominal 50 mV overcurrent threshold; connecting to VDD sets the threshold to 26 mV."
      },
      {
        "number": "23",
        "name": "FB",
        "type": "input",
        "description": "External resistor divider from the output sets the voltage at which PGD switches, with a threshold nominally at 2.46 V."
      },
      {
        "number": "24",
        "name": "RETRY",
        "type": "input",
        "description": "Configures power-up fault retry behavior: GND or floating retries continually during a fault, while VDD latches the device off during a fault."
      },
      {
        "number": "25",
        "name": "TIMER",
        "type": "passive",
        "description": "External timing capacitor that sets insertion time delay, fault timeout period, and restart timing."
      },
      {
        "number": "26",
        "name": "PWR",
        "type": "input",
        "description": "External resistor, together with RSNS, sets the maximum power dissipation allowed in the external series pass MOSFET."
      },
      {
        "number": "27",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "28",
        "name": "PGD",
        "type": "output",
        "description": "Open-drain power good output that is high when the FB voltage is above VFBTH (nominally 2.46 V) and the VIN supply is within its UVLO and OVLO thresholds; connect to a pull-up supply."
      },
      {
        "number": "29",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
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      "factory_chain": {
        "factory": "2.0.0",
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        "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": [],
        "pages_sent": 15,
        "cost_usd": 0.0317,
        "at": "2026-10-28T16:41:01"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm5066ipmhx.pdf",
        "pages": 70,
        "sha256": "1c957c735de35462",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}