LM25118Q1MH

{
  "slug": "lm25118q1mh",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Controllers, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "lm25118q1mh",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm25118q1mh.kicad_sym",
    "lm25118q1mh.kicad_mod",
    "lm25118q1mh.glb",
    "lm25118q1mh.step",
    "lm25118q1mh.lbr",
    "docs/hero.png",
    "docs/lm25118q1mh-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm25118q1mh-hero.glb",
    "lm25118q1mh-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM25118Q1MH",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm25118-q1",
    "parts": {
      "symbol": "lm25118q1mh.kicad_sym",
      "footprint": "lm25118q1mh.kicad_mod",
      "model_3d": "lm25118q1mh-hero.glb",
      "model_3d_plain": "lm25118q1mh.glb",
      "model_3d_step": "lm25118q1mh-etched.step",
      "model_3d_step_plain": "lm25118q1mh.step",
      "lbr": "lm25118q1mh.lbr"
    },
    "distributor_links": {
      "lcsc": "C1530578"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T13:55:57Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage pin for the regulator (recommended VIN range 3 V to 42 V)."
      },
      {
        "number": "2",
        "name": "UVLO",
        "type": "input",
        "description": "Below 1.23 V the regulator stays in standby (VCC running, switching disabled); a fixed 5 µA source out of this pin lets an external divider set the undervoltage threshold."
      },
      {
        "number": "3",
        "name": "RT",
        "type": "input",
        "description": "A single resistor from this pin to AGND sets the internal oscillator frequency, recommended range 50 kHz to 500 kHz."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Below 0.5 V the regulator enters a low-power state drawing less than 10 µA from VIN; EN must be raised above 3 V for normal operation."
      },
      {
        "number": "5",
        "name": "RAMP",
        "type": "input",
        "description": "An external capacitor to AGND sets the ramp slope used for emulated current mode control."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "7",
        "name": "SS",
        "type": "input",
        "description": "An external capacitor and an internal 10 µA source set the rise time of the error amp reference; SS is held low when VCC is below 3.7 V, UVLO is below 1.23 V, EN is below 0.5 V, or thermal shutdown is active."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Feedback signal from the regulated output, connected to the inverting input of the internal error amplifier."
      },
      {
        "number": "9",
        "name": "COMP",
        "type": "output",
        "description": "Output of the internal error amplifier; the loop compensation network connects between COMP and FB."
      },
      {
        "number": "10",
        "name": "VOUT",
        "type": "input",
        "description": "Output voltage monitor for emulated current mode control; connect directly to the regulated output."
      },
      {
        "number": "11",
        "name": "SYNC",
        "type": "input",
        "description": "Sync input for synchronizing the switching regulator to an external clock."
      },
      {
        "number": "12",
        "name": "CS",
        "type": "input",
        "description": "Current sense input; connect to the diode side of the current sense resistor."
      },
      {
        "number": "13",
        "name": "CSG",
        "type": "input",
        "description": "Current sense ground input; connect to the ground side of the current sense resistor."
      },
      {
        "number": "14",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground."
      },
      {
        "number": "15",
        "name": "LO",
        "type": "output",
        "description": "Boost MOSFET gate drive output; connect to the gate of the external boost MOSFET."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_out",
        "description": "Output of the bias regulator; decouple locally to PGND with a low ESR/ESL capacitor placed as close to the controller as possible."
      },
      {
        "number": "17",
        "name": "VCCX",
        "type": "power_in",
        "description": "Optional externally supplied bias input; if above 3.9 V the internal VCC regulator is disabled and VCC is tied to VCCX, and if unused it must be connected to AGND."
      },
      {
        "number": "18",
        "name": "HB",
        "type": "input",
        "description": "High-side gate driver bootstrap supply; the bootstrap capacitor between HB and HS should be placed as close to the controller as possible."
      },
      {
        "number": "19",
        "name": "HO",
        "type": "output",
        "description": "Buck MOSFET gate drive output; connect to the high-side buck MOSFET gate through a short, low-inductance path."
      },
      {
        "number": "20",
        "name": "HS",
        "type": "input",
        "description": "Buck MOSFET source pin; connect to the source of the high-side buck MOSFET and the bootstrap capacitor."
      },
      {
        "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: The exposed pad is not a numbered pin in the datasheet table (shown as '— EP —'). It is included as ; The datasheet lists VIN as 'P/I' and VCC as 'P/I/O'. VIN is mapped to power_in and VCC to power_out ; The datasheet footnote on page 5 states VIN >= 5.0 V is required to initially start the controller. ",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0588,
        "at": "2026-10-11T13:55:29"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm25118-q1",
        "pages": 41,
        "sha256": "39d708876b7ff442",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
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        "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": "685a4e427a421365739373835f2f33de81a724ed84395086fafc7287349adb51",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm25118q1mh-etched.step",
        "role": "eda",
        "up": "Z",
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        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": 0.0,
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        "footprint_binding": "identity",
        "sha256": "15a7d1edcca357ec80ff0ae3dd08250f1ea966f29ad1caa4c69d41e0cb8e2829",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}