LM3492QMHX

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm3492qmhx",
  "title": "LM3492QMHX",
  "brief": "Texas Instruments LED Drivers, HTSSOP-20-EP. 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",
    "nixie tube driver-led driver",
    "lm3492qmhx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM3492QMHX",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Nixie Tube Driver/LED Driver",
    "subcategory": "LED Drivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm3492",
    "parts": {
      "symbol": "lm3492qmhx.kicad_sym",
      "footprint": "lm3492qmhx.kicad_mod",
      "model_3d": "lm3492qmhx-hero.glb",
      "model_3d_plain": "lm3492qmhx.glb",
      "model_3d_step": "lm3492qmhx-etched.step",
      "model_3d_step_plain": "lm3492qmhx.step",
      "lbr": "lm3492qmhx.lbr"
    },
    "distributor_links": {
      "lcsc": "C701848"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T04:14:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EN",
        "type": "input",
        "description": "Internally pulled up; connect to a voltage higher than 1.63 V to provide precision enable for the device (EN rising threshold 1.55 V to 1.71 V)."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply pin for the device; input range is 4.5 V to 65 V."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "input",
        "description": "Switch node, internally connected to the drain of the integrated MOSFET; SW to GND is rated −0.3 V to 67 V (−2 V transient for under 100 ns)."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "input",
        "description": "Switch node, internally connected to the drain of the integrated MOSFET; SW to GND is rated −0.3 V to 67 V (−2 V transient for under 100 ns)."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "input",
        "description": "Output voltage sense for nearly constant switching frequency control; VIN, RT and VOUT to GND are rated −0.3 V to 67 V."
      },
      {
        "number": "6",
        "name": "RT",
        "type": "input",
        "description": "An external resistor from the VOUT pin to this pin sets the switching frequency, programmable from 200 kHz to 1 MHz."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Output voltage feedback through a resistor divider; the pin voltage is from 1.05 V to 2.5 V and FB to GND is rated −0.3 V to 5 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Analog signal ground."
      },
      {
        "number": "9",
        "name": "IOUT2",
        "type": "input",
        "description": "Input of the channel 2 current regulator; the regulated current is programmable via the IREF pin (50 mA to 200 mA)."
      },
      {
        "number": "10",
        "name": "IOUT1",
        "type": "input",
        "description": "Input of the channel 1 current regulator; the regulated current is programmable via the IREF pin (50 mA to 200 mA)."
      },
      {
        "number": "11",
        "name": "CDHC",
        "type": "input",
        "description": "External capacitor sets the dynamic headroom control sensitivity; a 120 µA internal source charges it at start-up to provide soft start."
      },
      {
        "number": "12",
        "name": "IREF",
        "type": "input",
        "description": "An external resistor from this pin to ground programs the regulated current of channels 1 and 2; IREF pin voltage is 1.231 V to 1.281 V."
      },
      {
        "number": "13",
        "name": "COMM",
        "type": "bidirectional",
        "description": "Open-drain bidirectional logic pin for power-good, overtemperature, IOUT overvoltage and undervoltage indications and command sending; VCOMM-LOW is at most 0.7 V at 5 mA."
      },
      {
        "number": "14",
        "name": "LGND",
        "type": "power_in",
        "description": "Ground of the current regulator; must be connected to the GND pin for normal operation, as LGND and GND are not internally connected."
      },
      {
        "number": "15",
        "name": "DIM1/CLK",
        "type": "bidirectional",
        "description": "Controls ON/OFF of the channel 1 current regulator; internally pulled low by 5 µA, and also serves as the clock for latching COMM input/output data."
      },
      {
        "number": "16",
        "name": "DIM2",
        "type": "input",
        "description": "Controls ON/OFF of the channel 2 current regulator; internally pulled low by 5 µA (DIM voltage HIGH 1.17 V, LOW 0.7 V)."
      },
      {
        "number": "17",
        "name": "PGND",
        "type": "power_in",
        "description": "Integrated MOSFET ground; must be connected to the GND pin for normal operation, and PGND and GND are not internally connected."
      },
      {
        "number": "18",
        "name": "PGND",
        "type": "power_in",
        "description": "Integrated MOSFET ground; must be connected to the GND pin for normal operation, and PGND and GND are not internally connected."
      },
      {
        "number": "19",
        "name": "VCC",
        "type": "power_out",
        "description": "LDO regulator output nominally regulated to 5.5 V; connect a capacitor larger than 0.47 µF between VCC and GND."
      },
      {
        "number": "20",
        "name": "ILIM",
        "type": "input",
        "description": "Connect an external resistor from ILIM to VCC to reduce the peak current limit; connect ILIM to ground for the maximum current limit."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: In the source pin table, pin 4 and pin 18 have no printed name; SW (pin 4) and PGND (pin 18) are inf; The exposed pad is not a numbered lead; it is listed as DAP as printed in the datasheet. Its type wa; The datasheet types SW and VOUT as 'I' (input); the KiCad class was kept as input, although SW is ph",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0807,
        "at": "2026-10-08T04:13:41"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm3492",
        "pages": 34,
        "sha256": "7ea739bbe0afd383",
        "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": [
      {
        "file": "lm3492qmhx.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "1d6ab2bb494d3dc2500176b0ae4922652e5358cb6c1f81aea6c10cc4991892d4",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm3492qmhx-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "70ab694dbb5cdb6cf17761233a562ac3d8d7e0f98e3bdfe152304817af64e309",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "HTSSOP-20-EP",
      "Category": "Nixie Tube Driver/LED Driver",
      "Pins": "21"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm3492qmhx"
  ],
  "discovery_pitch": "LM3492QMHX (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lm3492qmhx.kicad_sym",
    "lm3492qmhx.kicad_mod",
    "lm3492qmhx.glb",
    "lm3492qmhx.step",
    "lm3492qmhx.lbr",
    "docs/hero.png",
    "docs/lm3492qmhx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm3492qmhx-hero.glb",
    "lm3492qmhx-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}