LM51551QDSSRQ1

{
  "slug": "lm51551qdssrq1",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, WSON-12-EP(2x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm51551qdssrq1",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "LM51551QDSSRQ1",
    "manufacturer": "Texas Instruments",
    "package": "WSON-12-EP(2x3)",
    "pin_count": 13,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5155-q1",
    "parts": {
      "symbol": "lm51551qdssrq1.kicad_sym",
      "footprint": "lm51551qdssrq1.kicad_mod",
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      "lbr": "lm51551qdssrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C2860796",
      "digikey": "296-LM51551QDSSRQ1TR-ND",
      "mouser": "595-LM51551QDSSRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T19:53:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LM51551QDSSRQ1TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LM51551QDSSRQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BIAS",
        "type": "power_in",
        "description": "Power supply input to VCC regulator operating from 2.97V to 45V with bypass capacitor to PGND."
      },
      {
        "number": "2",
        "name": "VCC",
        "type": "power_out",
        "description": "Regulated power output from internal VCC regulator at 6.5V to 7V nominal supplying MOSFET driver with ceramic bypass capacitor to PGND."
      },
      {
        "number": "3",
        "name": "GATE",
        "type": "output",
        "description": "N-channel MOSFET gate driver output with 1.5A peak current capability connected via short low-inductance path to MOSFET gate."
      },
      {
        "number": "4",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground reference connected via wide short low-inductance path to current sense resistor ground."
      },
      {
        "number": "5",
        "name": "CS",
        "type": "input",
        "description": "Current sense input for peak current mode control connected via short path to positive side of current sense resistor with 100mV threshold."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Transconductance error amplifier output with 10MΩ impedance and 7MHz bandwidth with loop compensation network connected between this pin and PGND."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference with wide short path connection required to analog ground plane."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Error amplifier feedback input with 1V ±1% reference, voltage divider from output connected to set target output voltage in boost/SEPIC topologies."
      },
      {
        "number": "9",
        "name": "SS",
        "type": "input",
        "description": "Soft-start programming pin with external capacitor and 10μA internal current source for setting startup ramp rate, capacitor ground to AGND."
      },
      {
        "number": "10",
        "name": "RT",
        "type": "input",
        "description": "Switch frequency programming pin regulated to 0.5V, single external resistor to AGND programs switching frequency from 100kHz to 2.2MHz."
      },
      {
        "number": "11",
        "name": "PGOOD",
        "type": "output",
        "description": "Open-drain power good indicator output goes low if feedback drops below 90% of 1V reference with 25μs glitch filter and pull-up resistor to system voltage."
      },
      {
        "number": "12",
        "name": "UVLO/SYNC",
        "type": "input",
        "description": "UVLO threshold programming and enable/sync control pin from 0V to VBIAS+0.3V via resistor divider, supports external clock synchronization via negative pulse, do not leave floating."
      },
      {
        "number": "13",
        "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 13 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 29,
        "cost_usd": 0.2336,
        "at": "2026-10-05T19:53:14"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5155-q1",
        "pages": 50,
        "sha256": "a8503f9fa4bec785",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 13,
        "described": 13,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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}