LM5127QRGZRQ1

{
  "slug": "lm5127qrgzrq1",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, VQFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm5127qrgzrq1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
  },
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    "README.md",
    "lm5127qrgzrq1.kicad_sym",
    "lm5127qrgzrq1.kicad_mod",
    "lm5127qrgzrq1.glb",
    "lm5127qrgzrq1.step",
    "lm5127qrgzrq1.lbr",
    "docs/hero.png",
    "docs/lm5127qrgzrq1-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "lm5127qrgzrq1-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM5127QRGZRQ1",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-48-EP(7x7)",
    "pin_count": 49,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5127-q1",
    "parts": {
      "symbol": "lm5127qrgzrq1.kicad_sym",
      "footprint": "lm5127qrgzrq1.kicad_mod",
      "model_3d": "lm5127qrgzrq1-hero.glb",
      "model_3d_plain": "lm5127qrgzrq1.glb",
      "model_3d_step": "lm5127qrgzrq1-etched.step",
      "model_3d_step_plain": "lm5127qrgzrq1.step",
      "lbr": "lm5127qrgzrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C2864820",
      "digikey": "296-LM5127QRGZRQ1TR-ND",
      "mouser": "595-LM5127QRGZRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T23:25:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LM5127QRGZRQ1TR-ND",
        "status": "found",
        "lifecycle": "Active"
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        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SLEEP1/BMIN_PRG",
        "type": "input",
        "description": "In boost mode, SLEEP1 above 1.0 V allows the channel to enter sleep mode; in buck mode it is the programmable battery-monitor threshold input (grounded if unused)."
      },
      {
        "number": "2",
        "name": "SS1",
        "type": "bidirectional",
        "description": "CH1 soft-start programming pin, where the soft-start capacitor sets the ramp time from a 20 µA charge current and pulling SS to ground stops switching."
      },
      {
        "number": "3",
        "name": "FB1/VOSEL1",
        "type": "input",
        "description": "CH1 error-amplifier feedback or fixed-output select; in buck, tie to AGND for 3.3 V or VDD for 5 V, and in boost always use a feedback resistor divider (0.8 V reference, VOUT up to 42 V)."
      },
      {
        "number": "4",
        "name": "COMP1",
        "type": "output",
        "description": "CH1 internal transconductance error-amplifier output, with loop compensation components connected between this pin and AGND."
      },
      {
        "number": "5",
        "name": "CSB1/VOUT1",
        "type": "input",
        "description": "CH1 current-sense amplifier input that is the positive input in boost and the negative input in buck, and also senses the fixed output voltage in buck fixed-output options."
      },
      {
        "number": "6",
        "name": "CSA1",
        "type": "input",
        "description": "CH1 current-sense amplifier input that is the negative input in boost and the positive input in buck."
      },
      {
        "number": "7",
        "name": "SENSE1/BMIN_FIX",
        "type": "input",
        "description": "In boost mode this pin senses the output voltage and should be placed near the high-side MOSFET drain; in buck mode it is the fixed-threshold battery-monitor input (5.7 V falling, 6.0 V rising)."
      },
      {
        "number": "8",
        "name": "HB1",
        "type": "power_in",
        "description": "CH1 high-side gate-driver bootstrap supply, with a 0.1 µF capacitor between HB1 and SW1 and an external bootstrap diode from VCC in buck configuration."
      },
      {
        "number": "9",
        "name": "SW1",
        "type": "passive",
        "description": "CH1 switch node connected through a short low-inductance path directly to the high-side MOSFET source and low-side MOSFET drain."
      },
      {
        "number": "10",
        "name": "HO1",
        "type": "output",
        "description": "CH1 high-side gate-driver output, connected through a short low-inductance path to the N-channel MOSFET gate."
      },
      {
        "number": "11",
        "name": "PGND1",
        "type": "power_in",
        "description": "CH1 power ground, connected through a short low-inductance path directly to the low-side MOSFET source."
      },
      {
        "number": "12",
        "name": "LO1",
        "type": "output",
        "description": "CH1 low-side gate-driver output, connected through a short low-inductance path directly to the N-channel MOSFET gate."
      },
      {
        "number": "13",
        "name": "SS2",
        "type": "bidirectional",
        "description": "CH2 soft-start programming pin, where the soft-start capacitor sets the ramp time and pulling SS to ground stops switching."
      },
      {
        "number": "14",
        "name": "FB2/VOSEL2",
        "type": "input",
        "description": "CH2 feedback or fixed-output select pin, rated 0 to 5.25 V, that programs the common output voltage when CH2 and CH3 operate as dual-phase buck."
      },
      {
        "number": "15",
        "name": "COMP2",
        "type": "output",
        "description": "CH2 internal transconductance error-amplifier output, with loop compensation components connected between this pin and AGND."
      },
      {
        "number": "16",
        "name": "CSB2/VOUT2",
        "type": "input",
        "description": "CH2 current-sense amplifier negative input in buck, which also senses the fixed output voltage option."
      },
      {
        "number": "17",
        "name": "CSA2",
        "type": "input",
        "description": "CH2 current-sense amplifier input (positive input in buck)."
      },
      {
        "number": "18",
        "name": "VCCX",
        "type": "power_in",
        "description": "Optional external VCC supply input, which must be between 4.5 V and 5.25 V and connects internally to VCC when above 4.5 V; use a 0.47 µF capacitor to PGND, or tie to PGND if unused."
      },
      {
        "number": "19",
        "name": "VCC",
        "type": "power_in",
        "description": "Auxiliary supply pin for the internal regulator, requiring a 10 µF VCC capacitor to power ground (recommended minimum 10 µF)."
      },
      {
        "number": "20",
        "name": "HB2",
        "type": "power_in",
        "description": "CH2 high-side gate-driver bootstrap supply, with a 0.1 µF capacitor between HB2 and SW2."
      },
      {
        "number": "21",
        "name": "SW2",
        "type": "passive",
        "description": "CH2 switch node connected through a short low-inductance path to the high-side MOSFET source and low-side MOSFET drain."
      },
      {
        "number": "22",
        "name": "HO2",
        "type": "output",
        "description": "CH2 high-side gate-driver output, connected through a short low-inductance path to the N-channel MOSFET gate."
      },
      {
        "number": "23",
        "name": "PGND2",
        "type": "power_in",
        "description": "CH2 power ground, connected through a short low-inductance path directly to the low-side MOSFET source."
      },
      {
        "number": "24",
        "name": "LO2",
        "type": "output",
        "description": "CH2 low-side gate-driver output, connected through a short low-inductance path directly to the N-channel MOSFET gate."
      },
      {
        "number": "25",
        "name": "LO3",
        "type": "output",
        "description": "CH3 low-side gate-driver output, connected through a short low-inductance path directly to the N-channel MOSFET gate."
      },
      {
        "number": "26",
        "name": "PGND3",
        "type": "power_in",
        "description": "CH3 power ground, connected through a short low-inductance path directly to the low-side MOSFET source."
      },
      {
        "number": "27",
        "name": "HO3",
        "type": "output",
        "description": "CH3 high-side gate-driver output, connected through a short low-inductance path to the N-channel MOSFET gate."
      },
      {
        "number": "28",
        "name": "SW3",
        "type": "passive",
        "description": "CH3 switch node connected through a short low-inductance path to the high-side MOSFET source and low-side MOSFET drain."
      },
      {
        "number": "29",
        "name": "HB3",
        "type": "power_in",
        "description": "CH3 high-side gate-driver bootstrap supply, with a 0.1 µF capacitor between HB3 and SW3."
      },
      {
        "number": "30",
        "name": "BIAS",
        "type": "power_in",
        "description": "Input to the VCC regulator, accepting 3.8 V to 42 V (absolute maximum 50 V), with a 1 µF local capacitor between BIAS and ground."
      },
      {
        "number": "31",
        "name": "CFG/MODE",
        "type": "input",
        "description": "Device configuration (boost or buck, single or dual phase) and light-load mode select pin, programmed by a resistor from CFG to AGND during initial configuration; 57.6 kΩ from SS to AGND enables diode emulation in FPWM mode."
      },
      {
        "number": "32",
        "name": "CSA3",
        "type": "input",
        "description": "CH3 current-sense amplifier input (positive input in buck)."
      },
      {
        "number": "33",
        "name": "CSB3/VOUT3/VDDX",
        "type": "input",
        "description": "CH3 current-sense negative input that senses the fixed VOUT3 option; as VDDX it is an optional VDD supply input connected internally to VDD when below 3.4 V in deep-sleep with 3.3 V VOUT3."
      },
      {
        "number": "34",
        "name": "COMP3",
        "type": "output",
        "description": "CH3 internal transconductance error-amplifier output, with loop compensation between this pin and AGND; left floating in dual-phase configuration."
      },
      {
        "number": "35",
        "name": "FB3/VOSEL3",
        "type": "input",
        "description": "CH3 feedback or fixed-output select pin, rated 0 to 5.25 V, that must be tied to ground in dual-phase buck configuration."
      },
      {
        "number": "36",
        "name": "SS3",
        "type": "bidirectional",
        "description": "CH3 soft-start programming pin, which is not used (left floating) in dual-phase buck configuration."
      },
      {
        "number": "37",
        "name": "VDD",
        "type": "power_in",
        "description": "Auxiliary supply pin for VDD, requiring a 0.1 µF capacitor to AGND, with VDD above 3.1 V starting the initial device configuration."
      },
      {
        "number": "38",
        "name": "RT",
        "type": "bidirectional",
        "description": "Switching-frequency programming pin, where a single resistor from RT to AGND sets the frequency (RT regulated to 0.5 V) over 100 kHz to 2.2 MHz when no external SYNC clock is applied."
      },
      {
        "number": "39",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin, connected through a wide and short path to the analog ground plane."
      },
      {
        "number": "40",
        "name": "RES",
        "type": "output",
        "description": "Restart-timer pin, where a capacitor from RES to AGND sets the hiccup off-time, AGND connection latches off after a fault, and VDD connection disables hiccup mode during initial power-up."
      },
      {
        "number": "41",
        "name": "SYNC/DITHER/VCC_HOLD",
        "type": "bidirectional",
        "description": "External sync clock input (200 kHz to 2.2 MHz), dither-capacitor pin for ±7% spread-spectrum, or VCC_HOLD input where above 2.0 V keeps VCC active when all EN pins are low; tie to AGND if unused."
      },
      {
        "number": "42",
        "name": "EN3",
        "type": "input",
        "description": "CH3 enable pin, where the channel is off below 0.4 V and must be pulled above 2.0 V to enable; connect to BIAS if not user-controlled."
      },
      {
        "number": "43",
        "name": "EN2",
        "type": "input",
        "description": "CH2 enable pin, where the channel is off below 0.4 V and must be pulled above 2.0 V to enable; in dual-phase configuration it is the master enable for CH2 and CH3."
      },
      {
        "number": "44",
        "name": "EN1",
        "type": "input",
        "description": "CH1 enable pin, where the channel is off below 0.4 V and must be pulled above 2.0 V to enable; connect to BIAS if not user-controlled."
      },
      {
        "number": "45",
        "name": "PGOOD3",
        "type": "output",
        "description": "CH3 power-good indicator with open-drain output, which is disabled in dual-phase buck configuration."
      },
      {
        "number": "46",
        "name": "PGOOD2",
        "type": "output",
        "description": "CH2 power-good indicator with open-drain output that is pulled low when the output is outside its regulation window in buck or below target in boost."
      },
      {
        "number": "47",
        "name": "PGOOD1",
        "type": "output",
        "description": "CH1 power-good indicator with open-drain output that is pulled low when VOUT is outside its regulation window in buck or below target in boost."
      },
      {
        "number": "48",
        "name": "DIS/BMOUT",
        "type": "output",
        "description": "In boost, the divider-disconnect output pulled low when any channel is active; in buck, the battery-monitor output pulled to AGND when BMIN_FIX is below 5.7 V or BMIN_PRG is below 1.0 V."
      },
      {
        "number": "49",
        "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 provided is the Chinese translation (ZHCSMA4A) of TI's SLVSES8. Pin descriptions here ; Pins marked 'P' (power) in the datasheet table were mapped to KiCad power_in (BIAS, HB1-3, VCC, VCCX; SW1, SW2 and SW3 are marked 'P' in the datasheet but are switching nodes, not supply pins. They were",
          "exposed pad 49 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 47,
        "cost_usd": 0.261,
        "at": "2026-10-08T23:24:09"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5127-q1",
        "pages": 59,
        "sha256": "020db9065355f5a0",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "units": "mm",
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        "sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
        "checked": "2026-10-08",
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}