LM51571RTER

{
  "slug": "lm51571rter",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, WQFN-16(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm51571rter",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm51571rter.kicad_sym",
    "lm51571rter.kicad_mod",
    "lm51571rter.glb",
    "lm51571rter.step",
    "lm51571rter.lbr",
    "docs/hero.png",
    "docs/lm51571rter-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm51571rter-hero.glb",
    "lm51571rter-hero.overlay.json",
    "lm51571rter-etched.glb"
  ],
  "component": {
    "mpn": "LM51571RTER",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-16(3x3)",
    "pin_count": 17,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5157",
    "parts": {
      "symbol": "lm51571rter.kicad_sym",
      "footprint": "lm51571rter.kicad_mod",
      "model_3d": "lm51571rter-hero.glb",
      "model_3d_plain": "lm51571rter-etched.glb",
      "model_3d_step": "lm51571rter-etched.step",
      "model_3d_step_plain": "lm51571rter.step",
      "lbr": "lm51571rter.lbr"
    },
    "distributor_links": {
      "lcsc": "C3188430",
      "digikey": "296-LM51571RTERTR-ND",
      "mouser": "595-LM51571RTER"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T17:34:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-LM51571RTERTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-LM51571RTER",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin and source connection of the internal N-channel power MOSFET."
      },
      {
        "number": "2",
        "name": "VCC",
        "type": "power_out",
        "description": "Output of the internal VCC regulator and supply input for the MOSFET driver; connect a 5-Ω resistor in series with a 1-µF ceramic bypass capacitor from this pin to PGND."
      },
      {
        "number": "3",
        "name": "BIAS",
        "type": "power_in",
        "description": "Supply voltage input to the VCC regulator; connect a bypass capacitor from this pin to PGND."
      },
      {
        "number": "4",
        "name": "PGOOD",
        "type": "output",
        "description": "Open-drain power-good indicator that goes low if FB is below the undervoltage threshold VUVTH; connect a pullup resistor to the system voltage rail."
      },
      {
        "number": "5",
        "name": "RT",
        "type": "input",
        "description": "Switching frequency setting pin programmed by a single resistor between RT and AGND."
      },
      {
        "number": "6",
        "name": "UVLO/SYNC/EN",
        "type": "input",
        "description": "Enable pin that shuts the converter down when below the enable threshold VEN, also used for UVLO programming and external synchronization; it must not be left floating and should connect to BIAS if not used."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin; connect to the analog ground plane through a wide and short path."
      },
      {
        "number": "8",
        "name": "COMP",
        "type": "output",
        "description": "Output of the internal transconductance error amplifier; loop compensation components connect between this pin and AGND."
      },
      {
        "number": "9",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the error amplifier; the low-side feedback resistor connects close to AGND."
      },
      {
        "number": "10",
        "name": "SS",
        "type": "input",
        "description": "Soft-start time programming pin; an external capacitor and internal current source set the ramp rate of the error amplifier reference."
      },
      {
        "number": "11",
        "name": "MODE",
        "type": "input",
        "description": "Sampled at initial power up to set hiccup mode protection and spread spectrum: 0 V or AGND disables both, 370 mV (37.4 kΩ) enables both, 620 mV (62.0 kΩ) enables hiccup only, and above 1 V (100 kΩ) enables spread spectrum only."
      },
      {
        "number": "12",
        "name": "SW",
        "type": "passive",
        "description": "Switch pin, the drain connection of the internal N-channel power MOSFET."
      },
      {
        "number": "13",
        "name": "SW",
        "type": "passive",
        "description": "Switch pin, the drain connection of the internal N-channel power MOSFET."
      },
      {
        "number": "14",
        "name": "SW",
        "type": "passive",
        "description": "Switch pin, the drain connection of the internal N-channel power MOSFET."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal electrical contact; optionally connect to PGND for improved thermal conductivity."
      },
      {
        "number": "16",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin and source connection of the internal N-channel power MOSFET."
      },
      {
        "number": "17",
        "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 (EP) is not a numbered pin and is omitted from pins; it must be connected to AGND an; Pin type for SW pins 12, 13 and 14 is not given in the Pin Functions table type column, so passive w; Package variant taken from the ordering addendum: LM51571RTER is sold in WQFN (RTE) 16-pin package, "
        ],
        "pages_sent": 9,
        "cost_usd": 0.0201,
        "at": "2026-11-02T17:33:51"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5157",
        "pages": 48,
        "sha256": "fa0ec9869788c576",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm51571rter.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.0,
          3.0,
          0.785
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm51571rter-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.0,
          3.0,
          0.785
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c2ead255b5e2cb0e8c5cda736ba1f09da088eb9ca8882d7b3762e00c54d77d19",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}