LM5176RHFR

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm5176rhfr",
  "title": "LM5176RHFR",
  "brief": "Texas Instruments DC-DC Controllers, QFN-28-EP(4x5). 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 supply chip",
    "lm5176rhfr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM5176RHFR",
    "manufacturer": "Texas Instruments",
    "package": "QFN-28-EP(4x5)",
    "pin_count": 29,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5176",
    "parts": {
      "symbol": "lm5176rhfr.kicad_sym",
      "footprint": "lm5176rhfr.kicad_mod",
      "model_3d": "lm5176rhfr-hero.glb",
      "model_3d_plain": "lm5176rhfr.glb",
      "model_3d_step": "lm5176rhfr-etched.step",
      "model_3d_step_plain": "lm5176rhfr.step",
      "lbr": "lm5176rhfr.lbr"
    },
    "distributor_links": {
      "lcsc": 1850330,
      "digikey": "296-LM5176RHFRTR-ND",
      "mouser": "595-LM5176RHFR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T19:53:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LM5176RHFRTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LM5176RHFR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "MODE",
        "type": "input",
        "description": "Current limit hiccup mode selection; 93.1 kΩ to AGND enables hiccup, 200 kΩ or VCC connection disables hiccup."
      },
      {
        "number": "2",
        "name": "DITH",
        "type": "input",
        "description": "Frequency dithering enable; external capacitor to AGND modulates oscillator frequency by ±10% for EMI reduction."
      },
      {
        "number": "3",
        "name": "RT/SYNC",
        "type": "input",
        "description": "Switching frequency programming pin; external resistor to AGND sets frequency (100-600 kHz) or accepts external clock signal."
      },
      {
        "number": "4",
        "name": "SLOPE",
        "type": "input",
        "description": "Slope compensation ramp capacitor connection to AGND; provides ramp for stable current mode operation in buck and boost modes."
      },
      {
        "number": "5",
        "name": "SS",
        "type": "input",
        "description": "Soft-start capacitor connection to AGND; capacitor programs soft-start time for gradual VCC and output regulation."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output (0.3 V to 3.0 V range); connect RC compensation network to AGND for feedback loop stability."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground of the IC; reference for all analog circuitry and also accepts PowerPAD solder connection for improved dissipation."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin for output voltage regulation; connect resistor divider from converter output (0.8 V VREF nominal)."
      },
      {
        "number": "9",
        "name": "VOSNS",
        "type": "input",
        "description": "Output voltage sense input; monitors power stage output voltage over 0.8-55 V range."
      },
      {
        "number": "10",
        "name": "ISNS(-)",
        "type": "input",
        "description": "Current sense amplifier negative input; current sense resistor can locate on input or output side of converter."
      },
      {
        "number": "11",
        "name": "ISNS(+)",
        "type": "input",
        "description": "Current sense amplifier positive input; when voltage reaches 50 mV, slow constant current control loop activates for regulation."
      },
      {
        "number": "12",
        "name": "CSG",
        "type": "input",
        "description": "PWM current sense amplifier ground reference; connect directly to low-side of current sense resistor."
      },
      {
        "number": "13",
        "name": "CS",
        "type": "input",
        "description": "Positive input to PWM current sense amplifier; implements cycle-by-cycle current limiting."
      },
      {
        "number": "14",
        "name": "PGOOD",
        "type": "output",
        "description": "Power-good open-drain output (typical 4.2 mA sink); pulled low when FB voltage deviates outside ±9%/+10% of 0.8 V nominal."
      },
      {
        "number": "15",
        "name": "SW2",
        "type": "input",
        "description": "Boost side switching node; external bootstrap capacitor (0.1-0.22 µF ceramic) connects between SW2 and BOOT2."
      },
      {
        "number": "16",
        "name": "HDRV2",
        "type": "output",
        "description": "High-side gate driver output for boost switch; capable of sourcing 1.8 A and sinking 2.2 A peak current to MOSFET gate."
      },
      {
        "number": "17",
        "name": "BOOT2",
        "type": "power_out",
        "description": "Bootstrap power supply connection; external capacitor (0.1-0.22 µF ceramic) required between BOOT2 and SW2 to power HDRV2."
      },
      {
        "number": "18",
        "name": "LDRV2",
        "type": "output",
        "description": "Low-side gate driver output for boost switch; capable of sourcing 1.8 A and sinking 2.2 A peak current from VCC."
      },
      {
        "number": "19",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground of the IC; provides high current ground connection for low-side gate drivers."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_out",
        "description": "Internal bias regulator output; connect 0.1 µF capacitor to PGND or accept external 8-36 V supply via BIAS pin when VBIAS > 8 V."
      },
      {
        "number": "21",
        "name": "BIAS",
        "type": "power_in",
        "description": "Optional external bias supply input (8-36 V); reduces IC power loss at high VIN when VBIAS exceeds 8 V threshold."
      },
      {
        "number": "22",
        "name": "LDRV1",
        "type": "output",
        "description": "Low-side gate driver output for buck switch; capable of sourcing 1.8 A and sinking 2.2 A peak current from VCC."
      },
      {
        "number": "23",
        "name": "BOOT1",
        "type": "power_out",
        "description": "Bootstrap power supply connection; external capacitor (0.1-0.22 µF ceramic) required between BOOT1 and SW1 to power HDRV1."
      },
      {
        "number": "24",
        "name": "HDRV1",
        "type": "output",
        "description": "High-side gate driver output for buck switch; capable of sourcing 1.8 A and sinking 2.2 A peak current to MOSFET gate."
      },
      {
        "number": "25",
        "name": "SW1",
        "type": "input",
        "description": "Buck side switching node; external bootstrap capacitor (0.1-0.22 µF ceramic) connects between SW1 and BOOT1."
      },
      {
        "number": "26",
        "name": "EN/UVLO",
        "type": "input",
        "description": "Enable and under-voltage lockout input; below 0.4 V enters shutdown, above 1.22 V enables PWM if VCC exceeds UV threshold."
      },
      {
        "number": "27",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage pin; accepts 4.2-55 V nominal (maximum 60 V transient); 2.5-55 V with external BIAS ≥ 5 V."
      },
      {
        "number": "28",
        "name": "VISNS",
        "type": "input",
        "description": "Input voltage sense pin; monitors power stage input rail voltage, valid 2.5-55 V range with VBIAS ≥ 5 V or VIN ≥ 4.5 V."
      },
      {
        "number": "29",
        "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": [
          "extractor flagged: SW1 and SW2 marked as input (I) in datasheet table, but functionally represent switching node output; PGOOD described as open-drain output; in strict KiCad ERC, open-drain should be tri_state rather tha; PowerPAD (exposed pad) should be soldered to AGND but is not assigned a pin number 1-28; requires se",
          "exposed pad 29 added from the footprint"
        ],
        "pages_sent": 12,
        "cost_usd": 0.2097,
        "at": "2026-10-05T19:52:50"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5176",
        "pages": 46,
        "sha256": "4ce39346e67c6561",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "QFN-28-EP(4x5)",
      "Category": "Power Supply Chip",
      "Pins": "29"
    }
  },
  "variants": [],
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  "discovery_triggers": [
    "lm5176rhfr"
  ],
  "discovery_pitch": "LM5176RHFR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}