LM25117PMHE

{
  "slug": "lm25117pmhe",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Current-Sensing Amplifiers, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "operational amplifier-comparator",
    "lm25117pmhe",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
  },
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    "README.md",
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    "lm25117pmhe.kicad_mod",
    "lm25117pmhe.glb",
    "lm25117pmhe.step",
    "lm25117pmhe.lbr",
    "docs/hero.png",
    "docs/lm25117pmhe-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm25117pmhe-hero.glb",
    "lm25117pmhe-hero.overlay.json"
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  "component": {
    "mpn": "LM25117PMHE",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Operational Amplifier/Comparator",
    "subcategory": "Current-Sensing Amplifiers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm25117-q1",
    "parts": {
      "symbol": "lm25117pmhe.kicad_sym",
      "footprint": "lm25117pmhe.kicad_mod",
      "model_3d": "lm25117pmhe-hero.glb",
      "model_3d_plain": "lm25117pmhe.glb",
      "model_3d_step": "lm25117pmhe-etched.step",
      "model_3d_step_plain": "lm25117pmhe.step",
      "lbr": "lm25117pmhe.lbr"
    },
    "distributor_links": {
      "lcsc": "C544554"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T03:09:44Z",
      "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 enable pin; regulator disabled below 0.4V, in standby mode (VCC on, HO/LO outputs off) from 0.4V to 1.25V, and operates normally above 1.25V with 20 µA hysteresis sink current."
      },
      {
        "number": "2",
        "name": "DEMB",
        "type": "input",
        "description": "Diode emulation mode enable input; active low with internal 50 kΩ pull-down; enables diode emulation when low or floating to prevent reverse current through low-side NMOS; disabled (continuous conduction) when high."
      },
      {
        "number": "3",
        "name": "RES",
        "type": "passive",
        "description": "Restart timer pin for discontinuous mode current limiting; external capacitor determines standby duration before automatic restart; 10 µA sink current charges capacitor to 1.25V threshold."
      },
      {
        "number": "4",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start voltage ramp pin; external capacitor charged by 10 µA sink current controls error amplifier ramp slope and output voltage rise time; held low when VCC < 4V, UVLO < 1.25V, or during thermal shutdown."
      },
      {
        "number": "5",
        "name": "RT",
        "type": "passive",
        "description": "Oscillator timing resistor pin; switching frequency set by resistor between RT and AGND; accepts external clock synchronization via AC-coupled positive edge pulses up to 750 kHz."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground return; common reference for 0.8V internal voltage reference circuit and all analog signal circuits."
      },
      {
        "number": "7",
        "name": "VCCDIS",
        "type": "input",
        "description": "VCC regulator disable input; internal VCC regulator disabled when above 1.25V threshold to enable external bias supply; has 500 kΩ internal pull-down resistor for normal operation when floating."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to error amplifier; external resistor divider sets output voltage regulation point with 0.8V internal reference."
      },
      {
        "number": "9",
        "name": "COMP",
        "type": "output",
        "description": "Compensated error signal output from error amplifier; loop compensation network connects between this pin and FB pin for frequency response shaping."
      },
      {
        "number": "10",
        "name": "CM",
        "type": "output",
        "description": "Current monitor output; provides voltage proportional to average inductor current with approximately 20.5 V/V gain; connect directly to AGND with optional RC filter for bandwidth limiting."
      },
      {
        "number": "11",
        "name": "RAMP",
        "type": "passive",
        "description": "PWM ramp slope compensation node; external resistor connected between SW and RAMP and external capacitor between RAMP and AGND generate ramp signal proportional to inductor current for slope compensation."
      },
      {
        "number": "12",
        "name": "CS",
        "type": "input",
        "description": "Current sense amplifier high-side input; connects to high side of external current sense resistor for cycle-by-cycle current limiting with 10 V/V gain."
      },
      {
        "number": "13",
        "name": "CSG",
        "type": "power_in",
        "description": "Current sense Kelvin ground connection; direct connection to low side of current sense resistor for minimal offset error in current sensing."
      },
      {
        "number": "14",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for low-side NMOS gate driver; direct connection to current sense resistor low side and low-side MOSFET source."
      },
      {
        "number": "15",
        "name": "LO",
        "type": "output",
        "description": "Low-side NMOS gate driver output; peak source/sink current ±3.3A via short low-inductance path to gate of low-side power MOSFET; output voltage swings between 0V and VCC."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Internal bias supply pin; powered by internal 7.6V regulator or optional external supply; requires 0.47-10 µF low-ESR bypass capacitor close to package for local decoupling."
      },
      {
        "number": "17",
        "name": "SW",
        "type": "passive",
        "description": "Buck converter power switch node; common connection point between source of high-side NMOS and drain of low-side NMOS; sensed internally for ramp generation and bootstrap capacitor charging."
      },
      {
        "number": "18",
        "name": "HO",
        "type": "output",
        "description": "High-side NMOS gate driver output; peak source/sink current ±3.3A from bootstrap supply HB via short low-inductance path to gate of high-side power MOSFET."
      },
      {
        "number": "19",
        "name": "HB",
        "type": "power_in",
        "description": "High-side gate driver bootstrap supply node; charged from VCC through external bootstrap diode when low-side NMOS is on; supplies 0.1 µF minimum bootstrap capacitor."
      },
      {
        "number": "20",
        "name": "VIN",
        "type": "power_in",
        "description": "Main power supply input; supplies internal VCC regulator with input voltage range 4.5V to 42V; requires low-ESR bypass capacitor and optional RC filter for noise suppression."
      },
      {
        "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-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 39,
        "cost_usd": 0.3004,
        "at": "2026-10-07T03:09:19"
      },
      "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": {
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      "footprint": "viewers/footprint.html"
    },
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}