LM25119PSQX

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm25119psqx",
  "title": "LM25119PSQX",
  "brief": "Texas Instruments DC-DC Converters, WQFN-32-EP(5x5). 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)",
    "lm25119psqx",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "LM25119PSQX",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm25119",
    "parts": {
      "symbol": "lm25119psqx.kicad_sym",
      "footprint": "lm25119psqx.kicad_mod",
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      "model_3d_plain": "lm25119psqx.glb",
      "model_3d_step": "lm25119psqx-etched.step",
      "model_3d_step_plain": "lm25119psqx.step",
      "lbr": "lm25119psqx.lbr"
    },
    "distributor_links": {
      "lcsc": "C2650255"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T20:11:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC1",
        "type": "power_out",
        "description": "Channel 1 VCC bias pin; limits are -0.3 V to 15 V to AGND (recommended 4.5 V to 14 V), and it must not exceed VIN."
      },
      {
        "number": "2",
        "name": "LO1",
        "type": "output",
        "description": "Channel 1 low-side MOSFET gate drive output, to be connected to the synchronous MOSFET gate through a short, low-inductance path; LO1 to AGND is limited to -0.3 V to VVCC + 0.3 V."
      },
      {
        "number": "3",
        "name": "PGND1",
        "type": "power_in",
        "description": "Power ground return for the channel 1 low-side MOSFET gate driver, to be connected directly to the low side of the channel 1 current sense resistor."
      },
      {
        "number": "4",
        "name": "CSG1",
        "type": "input",
        "description": "Kelvin ground connection for the channel 1 external current sense resistor, to be connected directly to its low side."
      },
      {
        "number": "5",
        "name": "CS1",
        "type": "input",
        "description": "Channel 1 current sense amplifier input, to be connected to the high side of the channel 1 current sense resistor; CS1 to AGND is limited to -0.3 V to 0.3 V."
      },
      {
        "number": "6",
        "name": "RAMP1",
        "type": "input",
        "description": "Channel 1 PWM ramp signal; an external RC network between SW1, RAMP1 and AGND sets the emulated inductor-current ramp slope."
      },
      {
        "number": "7",
        "name": "SS1",
        "type": "input",
        "description": "Channel 1 soft-start pin; an external capacitor with an internal 10-µA source sets the error amplifier reference ramp rate, and SS1 is held low when VCC1 or VCC2 is below 4 V, UVLO is below 1.25 V, or during thermal shutdown."
      },
      {
        "number": "8",
        "name": "VCCDIS",
        "type": "input",
        "description": "Optional input that disables the internal VCC regulators when VCCDIS is above 1.25 V for external bias; it has a 500-kΩ pulldown to ground."
      },
      {
        "number": "9",
        "name": "FB1",
        "type": "input",
        "description": "Channel 1 feedback input and inverting input of the internal error amplifier, with a regulation threshold of 0.8 V."
      },
      {
        "number": "10",
        "name": "COMP1",
        "type": "output",
        "description": "Channel 1 internal error amplifier output; the loop compensation network must be connected between this pin and FB1."
      },
      {
        "number": "11",
        "name": "EN2",
        "type": "input",
        "description": "Channel 2 enable; when low, channel 2 is disabled while channel 1 and other functions remain active, and the pin has an internal 50-kΩ pullup."
      },
      {
        "number": "12",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground, the return for the internal 0.8-V voltage reference and analog circuits."
      },
      {
        "number": "13",
        "name": "RT",
        "type": "input",
        "description": "Oscillator timing pin set by a single resistor to AGND; the recommended maximum oscillator frequency is 1.5 MHz, corresponding to a 750-kHz maximum switching frequency per channel, and it can be synchronized by a positive pulse coupled through a small capacitor."
      },
      {
        "number": "14",
        "name": "RES",
        "type": "output",
        "description": "Restart timer pin for an external capacitor that sets the hiccup-mode off time; a 10-µA source charges it to the 1.25-V restart threshold after 256 consecutive cycle-by-cycle current-limit PWM cycles."
      },
      {
        "number": "15",
        "name": "COMP2",
        "type": "output",
        "description": "Channel 2 internal error amplifier output; the loop compensation network must be connected between this pin and FB2."
      },
      {
        "number": "16",
        "name": "FB2",
        "type": "input",
        "description": "Channel 2 feedback input and inverting input of the internal error amplifier, with a regulation threshold of 0.8 V."
      },
      {
        "number": "17",
        "name": "DEMB",
        "type": "input",
        "description": "Logic input that enables diode emulation when low and disables it when high; a 50-kΩ internal pulldown enables diode emulation if the pin is left floating."
      },
      {
        "number": "18",
        "name": "SS2",
        "type": "input",
        "description": "Channel 2 soft-start pin; an external capacitor with an internal 10-µA source sets the error amplifier reference ramp rate, and SS2 is held low when VCC1 or VCC2 is below 4 V, UVLO is below 1.25 V, or during thermal shutdown."
      },
      {
        "number": "19",
        "name": "RAMP2",
        "type": "input",
        "description": "Channel 2 PWM ramp signal; an external RC network between SW2, RAMP2 and AGND sets the emulated inductor-current ramp slope."
      },
      {
        "number": "20",
        "name": "CS2",
        "type": "input",
        "description": "Channel 2 current sense amplifier input, to be connected to the high side of the channel 2 current sense resistor; CS2 to AGND is limited to -0.3 V to 0.3 V."
      },
      {
        "number": "21",
        "name": "CSG2",
        "type": "input",
        "description": "Kelvin ground connection for the channel 2 external current sense resistor, to be connected directly to its low side."
      },
      {
        "number": "22",
        "name": "PGND2",
        "type": "power_in",
        "description": "Power ground return for the channel 2 low-side MOSFET gate driver, to be connected directly to the low side of the channel 2 current sense resistor."
      },
      {
        "number": "23",
        "name": "LO2",
        "type": "output",
        "description": "Channel 2 low-side MOSFET gate drive output, to be connected to the synchronous MOSFET gate through a short, low-inductance path; LO2 to AGND is limited to -0.3 V to VVCC + 0.3 V."
      },
      {
        "number": "24",
        "name": "VCC2",
        "type": "power_out",
        "description": "Channel 2 VCC bias pin; limits are -0.3 V to 15 V to AGND (recommended 4.5 V to 14 V), and it must not exceed VIN."
      },
      {
        "number": "25",
        "name": "SW2",
        "type": "bidirectional",
        "description": "Channel 2 buck switching node, connected to the channel 2 bootstrap capacitor, the high-side MOSFET source and the low-side MOSFET drain; SW2 to AGND is limited to -3 V to 45 V."
      },
      {
        "number": "26",
        "name": "HO2",
        "type": "output",
        "description": "Channel 2 high-side MOSFET gate drive output, to be connected to the gate of the high-side MOSFET through a short, low-inductance path; HO2 to SW2 is limited to -0.3 V to VHB + 0.3 V."
      },
      {
        "number": "27",
        "name": "HB2",
        "type": "power_in",
        "description": "Channel 2 high-side driver bootstrap supply, connected to the bootstrap diode cathode and bootstrap capacitor, which must be placed as close to the controller as possible; HB to SW is limited to 4.5 V to 14 V."
      },
      {
        "number": "28",
        "name": "UVLO",
        "type": "input",
        "description": "Undervoltage lockout programming pin; below 0.4 V the regulator shuts down, between 0.4 V and 1.25 V it is in standby with no switching, and above 1.25 V switching is enabled, with a 20-µA hysteresis current source."
      },
      {
        "number": "29",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply voltage input for the VCC regulators; the recommended range is 4.5 V to 42 V and the absolute maximum is 45 V to AGND."
      },
      {
        "number": "30",
        "name": "HB1",
        "type": "power_in",
        "description": "Channel 1 high-side driver bootstrap supply, connected to the bootstrap diode cathode and bootstrap capacitor, which must be placed as close to the controller as possible; HB to SW is limited to 4.5 V to 14 V."
      },
      {
        "number": "31",
        "name": "HO1",
        "type": "output",
        "description": "Channel 1 high-side MOSFET gate drive output, to be connected to the gate of the high-side MOSFET through a short, low-inductance path; HO1 to SW1 is limited to -0.3 V to VHB + 0.3 V."
      },
      {
        "number": "32",
        "name": "SW1",
        "type": "bidirectional",
        "description": "Channel 1 buck switching node, connected to the channel 1 bootstrap capacitor, the high-side MOSFET source and the low-side MOSFET drain; SW1 to AGND is limited to -3 V to 45 V."
      },
      {
        "number": "33",
        "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 thermal pad is listed in the pin table as 'Thermal pad of WQFN package' with no pin number print; Pins 1 and 24 are missing from the pin-function table. VCC1 and VCC2 are named in the pin diagram an; The datasheet has no separate pin-level electrical specifications beyond the ratings quoted in the d",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0729,
        "at": "2026-10-10T20:10:56"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm25119",
        "pages": 45,
        "sha256": "ce7cb7dea581ea97",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm25119psqx-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "46fdb7ec732bc0afe1e27e8330b277b902959638a6c851cdca662a2ff14c7770",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "WQFN-32-EP(5x5)",
      "Category": "Power Management (PMIC)",
      "Pins": "33"
    }
  },
  "variants": [],
  "sections": [
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    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "lm25119psqx"
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  "discovery_pitch": "LM25119PSQX (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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