LM25117QPMHX

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm25117qpmhx",
  "title": "LM25117QPMHX",
  "brief": "Texas Instruments DC-DC Converters, HTSSOP-20. 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",
    "power management (pmic)",
    "lm25117qpmhx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM25117QPMHX",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm25117-q1",
    "parts": {
      "symbol": "lm25117qpmhx.kicad_sym",
      "footprint": "lm25117qpmhx.kicad_mod",
      "model_3d": "lm25117qpmhx-hero.glb",
      "model_3d_plain": "lm25117qpmhx.glb",
      "model_3d_step": "lm25117qpmhx-etched.step",
      "model_3d_step_plain": "lm25117qpmhx.step",
      "lbr": "lm25117qpmhx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2658709"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T07:34:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "UVLO",
        "type": "input",
        "description": "Undervoltage lockout programming pin: below 0.4V the regulator is shut down, 0.4V to 1.25V is standby, above 1.25V enables switching, with a 20 µA hysteresis sink when above 1.25V; it must not float."
      },
      {
        "number": "2",
        "name": "DEMB",
        "type": "input",
        "description": "Optional logic input that enables diode emulation when low (internal 50 kΩ pull-down, so floating also enables it), and must be above 3V to keep continuous conduction."
      },
      {
        "number": "3",
        "name": "RES",
        "type": "passive",
        "description": "Restart timer pin: a capacitor to AGND sets the hiccup-mode off time, with a 10 µA charge to the 1.25V threshold; tying it to VCC or a voltage above the initial threshold disables the restart timer, and tying it to GND gives latch-off after 256 cycles of current limit."
      },
      {
        "number": "4",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start pin: an external capacitor and the internal 10 µA sink set the soft-start ramp, and the pin is held low when VCC is below 4V, UVLO is below 1.25V, or during thermal shutdown."
      },
      {
        "number": "5",
        "name": "RT",
        "type": "passive",
        "description": "Oscillator timing pin: a resistor to AGND sets the switching frequency (recommended maximum 750 kHz), the nominal RT voltage is 1.25V, and an AC-coupled positive pulse above the 2.6V to 3.95V sync threshold synchronizes the oscillator."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground for the internal 0.8V reference and analog circuitry, and the return for the RT, UVLO, and other low-power ground connections."
      },
      {
        "number": "7",
        "name": "VCCDIS",
        "type": "input",
        "description": "Disables the internal VCC regulator when pulled above the 1.25V threshold (1.22V to 1.29V), and has an internal 500 kΩ pull-down so the regulator stays enabled when the pin floats."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the inverting input of the internal error amplifier, which regulates to the 0.8V reference (788 mV to 812 mV) through the output divider."
      },
      {
        "number": "9",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output, where the loop compensation network is connected between COMP and FB."
      },
      {
        "number": "10",
        "name": "CM",
        "type": "output",
        "description": "Current monitor output providing the average sensed inductor current, connected between CM and AGND; leave floating if unused."
      },
      {
        "number": "11",
        "name": "RAMP",
        "type": "passive",
        "description": "PWM ramp pin: an RC network between SW, RAMP and AGND sets the simulated inductor-current ramp slope, the ramp capacitor must be discharged within the minimum off-time and kept below 2 nF, and RRAMP must not connect directly to VIN."
      },
      {
        "number": "12",
        "name": "CS",
        "type": "input",
        "description": "Current-sense amplifier input, connected to the high side of the current-sense resistor (sense gain of 10 V/V)."
      },
      {
        "number": "13",
        "name": "CSG",
        "type": "input",
        "description": "Kelvin ground connection to the low side of the current-sense resistor, used as the reference for the current sense amplifier."
      },
      {
        "number": "14",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the low-side NMOS gate driver, connected directly to the low side of the current-sense resistor."
      },
      {
        "number": "15",
        "name": "LO",
        "type": "output",
        "description": "Low-side NMOS gate drive output, routed through a short low-inductance path to the low-side MOSFET gate."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_out",
        "description": "Bias supply pin regulated to 7.6V typical (6.85V to 8.2V, no load), decoupled to PGND with low-ESR/ESL capacitance of 0.47 µF to 10 µF placed close to the controller."
      },
      {
        "number": "17",
        "name": "SW",
        "type": "passive",
        "description": "Switching node at the high-side NMOS source and low-side NMOS drain, with an absolute maximum range of -3.0V to 45V to AGND."
      },
      {
        "number": "18",
        "name": "HO",
        "type": "output",
        "description": "High-side NMOS gate drive output, routed through a short low-inductance path to the high-side MOSFET gate."
      },
      {
        "number": "19",
        "name": "HB",
        "type": "power_in",
        "description": "High-side driver bootstrap supply, connected to the external bootstrap diode cathode and bootstrap capacitor, with HB to SW operating range of 4.5V to 14V (absolute maximum 15V)."
      },
      {
        "number": "20",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply to the internal VCC regulator, with operating range 4.5V to 42V and absolute maximum of 45V to AGND."
      },
      {
        "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 requested MPN is LM25117QPMHX. The datasheet's ordering table lists LM25117PMHX (TSSOP-20EP, MXA; The datasheet pin table is a Chinese translation. Descriptions were condensed into single English se; The datasheet does not assign ERC types. Pin types were chosen by function: RT, SS, RES, RAMP, SW an",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 39,
        "cost_usd": 0.1637,
        "at": "2026-10-11T07:34:03"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm25117-q1",
        "pages": 39,
        "sha256": "ebaf723e350b87ed",
        "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"
    },
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        "file": "lm25117qpmhx.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": "67cdd223c5998d86e6a6e367d6e74a996391a664ad7b5b2e0354c22c92842c27",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm25117qpmhx-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": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3af366d97678a1ac36ad5207419ce9c96eedd8a2a85949e974fae78e9dd2ed9d",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "HTSSOP-20",
      "Category": "Power Management (PMIC)",
      "Pins": "21"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm25117qpmhx"
  ],
  "discovery_pitch": "LM25117QPMHX (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"
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    "lm25117qpmhx.lbr",
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  "visibility": {
    "public": true
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}