LM5117QPMHX

{
  "slug": "lm5117qpmhx",
  "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",
    "lm5117qpmhx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "lm5117qpmhx.step",
    "lm5117qpmhx.lbr",
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    "docs/lm5117qpmhx-datasheet.pdf",
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  "component": {
    "mpn": "LM5117QPMHX",
    "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/lm5117",
    "parts": {
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      "footprint": "lm5117qpmhx.kicad_mod",
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      "model_3d_step": "lm5117qpmhx-etched.step",
      "model_3d_step_plain": "lm5117qpmhx.step",
      "lbr": "lm5117qpmhx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2658653"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T18:44:19Z",
      "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 0.4 V the regulator shuts down, 0.4 V to 1.25 V gives standby with no switching, and above 1.25 V switching is enabled with a 20μA source flowing through the external UVLO resistors for hysteresis."
      },
      {
        "number": "2",
        "name": "DEMB",
        "type": "input",
        "description": "Optional logic input that enables diode emulation when low and disables it when high, with an internal 50-kΩ pull-down that enables diode emulation if the pin is left floating."
      },
      {
        "number": "3",
        "name": "RES",
        "type": "output",
        "description": "Restart timer pin whose capacitor sets the off time of hiccup-mode current limiting; hiccup starts after 256 consecutive PWM cycles of cycle-by-cycle current limiting and a 10μA source charges the capacitor to 1.25 V to restart the controller."
      },
      {
        "number": "4",
        "name": "SS",
        "type": "input",
        "description": "Soft-start pin where an external capacitor and an internal 10μA source set the ramp rate of the error amplifier reference, and the pin is held low when VCC is below 5 V, UVLO is below 1.25 V, or during thermal shutdown."
      },
      {
        "number": "5",
        "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 the oscillator can be synchronized by coupling a positive pulse through a small capacitor."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground, the return for the internal 0.8 V voltage reference and analog circuits."
      },
      {
        "number": "7",
        "name": "VCCDIS",
        "type": "input",
        "description": "Optional input that disables the internal VCC regulator when above 1.25 V, with an internal 500-kΩ pull-down that keeps the regulator enabled when the pin is left floating."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the internal error amplifier, where a resistor divider from the output sets the output voltage against a regulation threshold of 0.8 V."
      },
      {
        "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, to be connected directly between CM and AGND and left floating when unused."
      },
      {
        "number": "11",
        "name": "RAMP",
        "type": "input",
        "description": "PWM ramp signal pin where an external resistor and capacitor between SW, RAMP and AGND set a ramp slope proportional to input supply voltage."
      },
      {
        "number": "12",
        "name": "CS",
        "type": "input",
        "description": "Current sense amplifier input, connected to the high side of the current sense resistor."
      },
      {
        "number": "13",
        "name": "CSG",
        "type": "power_in",
        "description": "Kelvin ground connection to the current sense resistor, connected directly to its low side."
      },
      {
        "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, connected to the low-side synchronous NMOS gate through a short, low-inductance path."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Bias supply pin with a 5.5 V to 14 V recommended range, to be locally decoupled to PGND with a low ESR/ESL capacitor placed as close to the controller as possible."
      },
      {
        "number": "17",
        "name": "SW",
        "type": "output",
        "description": "Switching node of the buck regulator, connected to the bootstrap capacitor, high-side NMOS source and low-side NMOS drain through a short, low-inductance path, with an absolute maximum range of -3.0 V to 75 V to AGND."
      },
      {
        "number": "18",
        "name": "HO",
        "type": "output",
        "description": "High-side NMOS gate drive output, connected to the high-side NMOS gate through a short, low-inductance path."
      },
      {
        "number": "19",
        "name": "HB",
        "type": "power_in",
        "description": "High-side driver supply for the bootstrap gate drive, connected to the bootstrap diode cathode and bootstrap capacitor, which should be placed as close to the controller as possible, with a recommended HB to SW range of 5.5 V to 14 V."
      },
      {
        "number": "20",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply voltage input for the VCC regulator, with a recommended operating range of 5.5 V to 65 V."
      },
      {
        "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 datasheet classifies RES as type O (output); it is a capacitor timing node charged by an interna; The datasheet uses combined classes (LO P/O/I, HO P, VCC I/O, HB P/I, VIN P/I); mapped to output, ou; Ground pins PGND, CSG and AGND are typed G or O in the datasheet; mapped to power_in per the GND rul",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0828,
        "at": "2026-10-08T18:43:07"
      },
      "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": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}