LM5117PSQX

{
  "slug": "lm5117psqx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Controllers, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "lm5117psqx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm5117psqx.kicad_sym",
    "lm5117psqx.kicad_mod",
    "lm5117psqx.glb",
    "lm5117psqx.step",
    "lm5117psqx.lbr",
    "docs/hero.png",
    "docs/lm5117psqx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm5117psqx-hero.glb",
    "lm5117psqx-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM5117PSQX",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5117",
    "parts": {
      "symbol": "lm5117psqx.kicad_sym",
      "footprint": "lm5117psqx.kicad_mod",
      "model_3d": "lm5117psqx-hero.glb",
      "model_3d_plain": "lm5117psqx.glb",
      "model_3d_step": "lm5117psqx-etched.step",
      "model_3d_step_plain": "lm5117psqx.step",
      "lbr": "lm5117psqx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2658016"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T15:49:34Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DEMB",
        "type": "input",
        "description": "Optional logic input that enables diode emulation when low and disables it when high; an internal 50-kΩ pull-down holds it low (diode emulation enabled) if left floating."
      },
      {
        "number": "2",
        "name": "RES",
        "type": "output",
        "description": "Restart timer pin whose capacitor sets the off time before restart in hiccup mode, which begins after 256 consecutive PWM cycles of cycle-by-cycle current limiting, with a 10-μA source charging it to the 1.25 V threshold."
      },
      {
        "number": "3",
        "name": "SS",
        "type": "input",
        "description": "Soft-start pin where an external capacitor and an internal 10-μA current source set the ramp rate of the error amplifier reference, and which is held low when VCC is below 5 V, UVLO is below 1.25 V, or during thermal shutdown."
      },
      {
        "number": "4",
        "name": "RT",
        "type": "input",
        "description": "Oscillator timing pin programmed by a single resistor to AGND, with a recommended maximum oscillator frequency of 750 kHz, and which can be synchronized to an external clock through a small coupling capacitor."
      },
      {
        "number": "5",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground that serves as the return for the internal 0.8 V voltage reference and analog circuits."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No electrical contact."
      },
      {
        "number": "7",
        "name": "VCCDIS",
        "type": "input",
        "description": "Optional input that disables the internal VCC regulator when above 1.25 V, has an internal 500-kΩ pull-down that enables the regulator when floating, and can be overridden by pulling it above 1.25 V from an external bias."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the inverting input of the internal error amplifier, where a resistor divider from the output sets the output voltage against the 0.8 V regulation threshold."
      },
      {
        "number": "9",
        "name": "COMP",
        "type": "output",
        "description": "Output of the internal error amplifier, with the loop compensation network connected between this pin and FB."
      },
      {
        "number": "10",
        "name": "CM",
        "type": "output",
        "description": "Current monitor output that provides the average of the sensed inductor current, monitored directly between CM and AGND, and left floating when unused."
      },
      {
        "number": "11",
        "name": "RAMP",
        "type": "input",
        "description": "PWM ramp input where an external resistor and capacitor between SW, RAMP and AGND set the ramp slope that emulates the inductor AC current in proportion to input voltage."
      },
      {
        "number": "12",
        "name": "CS",
        "type": "input",
        "description": "Current sense amplifier input that connects to the high side of the current sense resistor."
      },
      {
        "number": "13",
        "name": "CSG",
        "type": "power_in",
        "description": "Kelvin ground connection that connects directly to the low side of the current sense resistor."
      },
      {
        "number": "14",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the low-side NMOS gate driver that connects directly to the low side of the current sense resistor."
      },
      {
        "number": "15",
        "name": "LO",
        "type": "output",
        "description": "Low-side NMOS gate drive output that connects to the low-side synchronous NMOS gate through a short, low-inductance path."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Bias supply pin that must be decoupled to PGND with a low-ESR/ESL capacitor placed as close to the controller as possible; the datasheet classifies it as I/O, and the stated limit is VCC 5.5 V to 14 V in recommended operating conditions."
      },
      {
        "number": "17",
        "name": "NC",
        "type": "unconnected",
        "description": "No electrical contact."
      },
      {
        "number": "18",
        "name": "SW",
        "type": "output",
        "description": "Switching node of the buck regulator that connects to the bootstrap capacitor, the high-side NMOS source and the low-side NMOS drain through a short, low-inductance path."
      },
      {
        "number": "19",
        "name": "HO",
        "type": "output",
        "description": "High-side NMOS gate drive output that connects to the high-side NMOS gate through a short, low-inductance path, with HO to SW limited to HB + 0.3 V."
      },
      {
        "number": "20",
        "name": "HB",
        "type": "power_in",
        "description": "High-side driver supply for the bootstrap gate drive that connects to the bootstrap diode cathode and bootstrap capacitor, with HB to SW limited to 5.5 V to 14 V in recommended operating conditions."
      },
      {
        "number": "21",
        "name": "NC",
        "type": "unconnected",
        "description": "No electrical contact."
      },
      {
        "number": "22",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply voltage input for the VCC regulator, rated 5.5 V to 65 V in recommended operating conditions."
      },
      {
        "number": "23",
        "name": "NC",
        "type": "unconnected",
        "description": "No electrical contact."
      },
      {
        "number": "24",
        "name": "UVLO",
        "type": "input",
        "description": "Undervoltage lockout programming pin where below 0.4 V the regulator shuts down, between 0.4 V and 1.25 V it stays in standby with no switching, and above 1.25 V soft-start and PWM gate drive are enabled, with a 20-μA source enabled above 1.25 V for hysteresis."
      },
      {
        "number": "25",
        "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: The datasheet pin table gives the VCC type as 'I/O' and the HO type as 'P'; neither maps cleanly to ; The pin table marks PGND as 'O' in the type column, but its function is a power ground return. Per t; The HB and VIN types are given as 'P/I' (power/input) in the datasheet. They are set to power_in bec",
          "exposed pad 25 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0853,
        "at": "2026-10-08T15:49:19"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5117",
        "pages": 49,
        "sha256": "9e27f24e84faebf5",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm5117psqx.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": "f7d256794c4147daf24dcae0554fae18510315e565ad1e239b475be7fef80d8b",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm5117psqx-etched.step",
        "role": "eda",
        "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": "3efbf758752d6569bf9db2a46bfdc8cd698a64da9b95deed6023d7258a1e4c96",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}