LM5155QDSSTQ1

{
  "slug": "lm5155qdsstq1",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Controllers, WSON-12-EP(2x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "lm5155qdsstq1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm5155qdsstq1.kicad_sym",
    "lm5155qdsstq1.kicad_mod",
    "lm5155qdsstq1.glb",
    "lm5155qdsstq1.step",
    "lm5155qdsstq1.lbr",
    "docs/hero.png",
    "docs/lm5155qdsstq1-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm5155qdsstq1-hero.glb",
    "lm5155qdsstq1-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM5155QDSSTQ1",
    "manufacturer": "Texas Instruments",
    "package": "WSON-12-EP(2x3)",
    "pin_count": 13,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5155-q1",
    "parts": {
      "symbol": "lm5155qdsstq1.kicad_sym",
      "footprint": "lm5155qdsstq1.kicad_mod",
      "model_3d": "lm5155qdsstq1-hero.glb",
      "model_3d_plain": "lm5155qdsstq1.glb",
      "model_3d_step": "lm5155qdsstq1-etched.step",
      "model_3d_step_plain": "lm5155qdsstq1.step",
      "lbr": "lm5155qdsstq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C2658064",
      "digikey": "296-LM5155QDSSTQ1TR-ND",
      "mouser": "595-LM5155QDSSTQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T00:56:48Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LM5155QDSSTQ1TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LM5155QDSSTQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BIAS",
        "type": "power_in",
        "description": "Supply input for the internal VCC regulator; connect a bypass capacitor between this pin and PGND, with BIAS rated 3.5V to 45V (2.97V to 16V when tied to VCC) and 50V absolute maximum."
      },
      {
        "number": "2",
        "name": "VCC",
        "type": "power_out",
        "description": "Output of the internal VCC regulator and supply input for the MOSFET driver; connect a ceramic bypass capacitor between this pin and PGND, with a recommended value of 1µF to 4.7µF and VCC regulation of 6.85V typical."
      },
      {
        "number": "3",
        "name": "GATE",
        "type": "output",
        "description": "Gate drive output for the N-channel MOSFET, connected through a short, low-inductance path directly to the MOSFET gate, capable of sinking or sourcing 1.5A peak."
      },
      {
        "number": "4",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground, connected through a wide, short, low-inductance path directly to the ground connection of the current sense resistor."
      },
      {
        "number": "5",
        "name": "CS",
        "type": "input",
        "description": "Current sense input, connected through a short path to the positive side of the current sense resistor, with a 100mV (±7%) current limit threshold referenced to PGND."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Output of the internal transconductance error amplifier; connect the loop compensation network between this pin and PGND, with the COMP pin voltage clamped internally."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground, connected through a wide, short path to the analog ground plane; the exposed pad must be tied to AGND."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the error amplifier, fed from the output resistor divider with a 1V reference and a 3.8V absolute maximum rating; the low-side feedback resistor connects to AGND."
      },
      {
        "number": "9",
        "name": "SS",
        "type": "input",
        "description": "Soft-start timing pin; an external capacitor to AGND and the internal 10µA current source set the ramp rate of the internal error amplifier reference, with a 3.8V absolute maximum rating."
      },
      {
        "number": "10",
        "name": "RT",
        "type": "input",
        "description": "Switching frequency set pin; a single resistor between RT and AGND programs the switching frequency from 100kHz to 2.2MHz, with the RT regulator holding this pin at 0.5V when enabled."
      },
      {
        "number": "11",
        "name": "PGOOD",
        "type": "output",
        "description": "Open-drain power-good indicator that goes low when FB is below the undervoltage threshold; connect a pull-up resistor to the system rail (minimum 10kΩ recommended) and do not exceed VBIAS + 0.3V."
      },
      {
        "number": "12",
        "name": "UVLO/EN/SYNC",
        "type": "input",
        "description": "Line undervoltage lockout programming pin set by a resistor divider from the supply, which also accepts negative pulses for clock synchronization; it must not be left floating and should be connected to BIAS when unused."
      },
      {
        "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-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The exposed pad is labeled 'EP' in the pin figure and table with no numeric pin number, so it is lis; The datasheet pin table gives types P, O, G, I (and P for VCC). These were mapped to KiCad classes: ; The MPN LM5155QDSSTQ1 is the wettable-flank variant (DSS0012C, WF) according to the device compariso",
          "exposed pad 13 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 29,
        "cost_usd": 0.1449,
        "at": "2026-10-08T00:56:28"
      },
      "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
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "56aafd469c50a379182be2f348b23e35708e25b50fa504c41b8efe1ab31a11c4",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm5155qdsstq1-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": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0c45e907ce4a41c275d9bd363594992e5d526e1c6b509605ab1178d3ff3b6f64",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}