LM5140QRWGRQ1

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm5140qrwgrq1",
  "title": "LM5140QRWGRQ1",
  "brief": "Texas Instruments DC-DC Controllers, VQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power supply chip",
    "lm5140qrwgrq1",
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  "component": {
    "mpn": "LM5140QRWGRQ1",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-40-EP(6x6)",
    "pin_count": 41,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5140-q1",
    "parts": {
      "symbol": "lm5140qrwgrq1.kicad_sym",
      "footprint": "lm5140qrwgrq1.kicad_mod",
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      "lbr": "lm5140qrwgrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C1849525",
      "digikey": "296-LM5140QRWGRQ1TR-ND",
      "mouser": "595-LM5140QRWGRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T14:43:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LM5140QRWGRQ1TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LM5140QRWGRQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SS2",
        "type": "input",
        "description": "Channel 2 soft-start programming pin; an external capacitor and internal 20-μA source set the error amplifier reference ramp, and pulling SS below 80 mV turns off the channel 2 gate driver outputs."
      },
      {
        "number": "2",
        "name": "COMP2",
        "type": "output",
        "description": "Output of the channel 2 transconductance error amplifier."
      },
      {
        "number": "3",
        "name": "FB2",
        "type": "input",
        "description": "Channel 2 feedback input with a 1.2 V regulation threshold; connect to VDD for a 5 V output or to ground for a fixed 8 V output, or use a resistive divider from VOUT2 to set 1.5 V to 15 V."
      },
      {
        "number": "4",
        "name": "CS2",
        "type": "input",
        "description": "Channel 2 current sense amplifier input, to be connected with a low-current Kelvin connection to the inductor side of the external current sense resistor."
      },
      {
        "number": "5",
        "name": "VOUT2",
        "type": "input",
        "description": "Channel 2 output voltage and current sense amplifier input, connected to the output side of the channel 2 current sense resistor."
      },
      {
        "number": "6",
        "name": "VCCX",
        "type": "input",
        "description": "Optional external bias supply input; when VCCX is above 4.5 V it is connected internally to VCC and the internal VCC regulator is disabled, and it should be grounded if unused."
      },
      {
        "number": "7",
        "name": "PG2",
        "type": "output",
        "description": "Open-collector power-good output that goes low when VOUT2 is outside its specified regulation window."
      },
      {
        "number": "8",
        "name": "HOL2",
        "type": "output",
        "description": "Channel 2 high-side gate driver turn-off output."
      },
      {
        "number": "9",
        "name": "HO2",
        "type": "output",
        "description": "Channel 2 high-side gate driver turn-on output."
      },
      {
        "number": "10",
        "name": "SW2",
        "type": "input",
        "description": "Channel 2 buck switching node, connected to the bootstrap capacitor, the high-side MOSFET source and the low-side MOSFET drain."
      },
      {
        "number": "11",
        "name": "HB2",
        "type": "output",
        "description": "Channel 2 high-side driver supply for bootstrap gate drive."
      },
      {
        "number": "12",
        "name": "LOL2",
        "type": "output",
        "description": "Channel 2 low-side gate driver turn-off output."
      },
      {
        "number": "13",
        "name": "LO2",
        "type": "output",
        "description": "Channel 2 low-side gate driver turn-on output."
      },
      {
        "number": "14",
        "name": "PGND2",
        "type": "power_in",
        "description": "Power ground connection for the channel 2 low-side NMOS gate driver."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_out",
        "description": "VCC bias supply pin; pin 15 and pin 16 must be connected together on the PCB."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_out",
        "description": "VCC bias supply pin; pin 15 and pin 16 must be connected together on the PCB."
      },
      {
        "number": "17",
        "name": "PGND1",
        "type": "power_in",
        "description": "Power ground connection for the channel 1 low-side NMOS gate driver."
      },
      {
        "number": "18",
        "name": "LO1",
        "type": "output",
        "description": "Channel 1 low-side gate driver turn-on output."
      },
      {
        "number": "19",
        "name": "LOL1",
        "type": "output",
        "description": "Channel 1 low-side gate driver turn-off output."
      },
      {
        "number": "20",
        "name": "HB1",
        "type": "output",
        "description": "Channel 1 high-side driver supply for bootstrap gate drive."
      },
      {
        "number": "21",
        "name": "SW1",
        "type": "input",
        "description": "Channel 1 buck switching node, connected to the bootstrap capacitor, the high-side MOSFET source and the low-side MOSFET drain."
      },
      {
        "number": "22",
        "name": "HO1",
        "type": "output",
        "description": "Channel 1 high-side gate driver turn-on output."
      },
      {
        "number": "23",
        "name": "HOL1",
        "type": "output",
        "description": "Channel 1 high-side gate driver turn-off output."
      },
      {
        "number": "24",
        "name": "PG1",
        "type": "output",
        "description": "Open-collector power-good output that goes low when VOUT1 is outside its specified regulation window."
      },
      {
        "number": "25",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply voltage input source for the VCC regulators (absolute maximum 70 V on VIN per the Absolute Maximum Ratings)."
      },
      {
        "number": "26",
        "name": "VOUT1",
        "type": "input",
        "description": "Channel 1 output voltage and current sense amplifier input, connected to the output side of the channel 1 current sense resistor."
      },
      {
        "number": "27",
        "name": "CS1",
        "type": "input",
        "description": "Channel 1 current sense amplifier input, to be connected with a low-current Kelvin connection to the inductor side of the external current sense resistor."
      },
      {
        "number": "28",
        "name": "FB1",
        "type": "input",
        "description": "Channel 1 feedback input with a 1.2 V regulation threshold; connect to VDDA for a 3.3 V output or to ground for a 5 V output, or use a resistive divider from VOUT1 to set 1.5 V to 15 V."
      },
      {
        "number": "29",
        "name": "COMP1",
        "type": "output",
        "description": "Output of the channel 1 transconductance error amplifier."
      },
      {
        "number": "30",
        "name": "SS1",
        "type": "input",
        "description": "Channel 1 soft-start programming pin; an external capacitor and internal 20 μA source set the error amplifier reference ramp, and pulling SS below 80 mV turns off the channel 1 gate driver outputs."
      },
      {
        "number": "31",
        "name": "EN1",
        "type": "input",
        "description": "Active-high logic input that enables channel 1."
      },
      {
        "number": "32",
        "name": "RES",
        "type": "output",
        "description": "Restart timer pin; an external capacitor sets the hiccup-mode off time, and connecting RES to VDD during power-up disables hiccup protection."
      },
      {
        "number": "33",
        "name": "DEMB",
        "type": "input",
        "description": "Diode emulation pin; grounding it enables diode emulation, and connecting it to VDDA operates the device in FPWM mode with continuous conduction at light loads."
      },
      {
        "number": "34",
        "name": "ILSET",
        "type": "input",
        "description": "Current limit threshold pin; connecting to VDDA sets the current limit to 73 mV for both channels, and connecting to GND sets it to 48 mV."
      },
      {
        "number": "35",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground connection and return for the internal voltage reference and analog circuits."
      },
      {
        "number": "36",
        "name": "VDDA",
        "type": "power_out",
        "description": "Internal analog bias regulator output; connect a capacitor from VDDA to AGND."
      },
      {
        "number": "37",
        "name": "OSC",
        "type": "input",
        "description": "Frequency selection pin; connecting to VDDA selects the default 2.2 MHz oscillator frequency, and connecting to ground sets 440 kHz."
      },
      {
        "number": "38",
        "name": "SYNIN",
        "type": "input",
        "description": "Sync input for synchronizing the internal oscillator to an external clock; connect to AGND if the synchronization feature is not used."
      },
      {
        "number": "39",
        "name": "SYNOUT",
        "type": "output",
        "description": "TTL-level sync output signal that is 180° out of phase with the channel 1 HO1 gate drive."
      },
      {
        "number": "40",
        "name": "EN2",
        "type": "input",
        "description": "Active-high logic input that enables channel 2."
      },
      {
        "number": "41",
        "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's 'Exposed Pad on Bottom' (connect to AGND and PGND on the PCB) has no printed pin num; The SS1 description in the datasheet says 'Channel 2 soft-start programming pin', which appears to b; The datasheet lists SW1 and SW2 with type 'I' (input). They are mapped to KiCad 'input' as printed, ",
          "exposed pad 41 added from the footprint"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0851,
        "at": "2026-10-08T14:43:22"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5140-q1",
        "pages": 48,
        "sha256": "0d277fa180b6852d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "sha256": "e5b4286c2329085d9ef7f90d5eb5bf41a435241ecc1baaf1383823b6d6a946ae",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm5140qrwgrq1-etched.step",
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        "sha256": "bf5d81dcfa5f0d115c3d57f184d09652c87207e0b8e54a95c183bbae44b07f6b",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-40-EP(6x6)",
      "Category": "Power Supply Chip",
      "Pins": "41"
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  "discovery_pitch": "LM5140QRWGRQ1 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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