LM5157QRTERQ1

{
  "slug": "lm5157qrterq1",
  "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)",
    "lm5157qrterq1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm5157qrterq1.kicad_sym",
    "lm5157qrterq1.kicad_mod",
    "lm5157qrterq1.glb",
    "lm5157qrterq1.step",
    "lm5157qrterq1.lbr",
    "docs/hero.png",
    "docs/lm5157qrterq1-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm5157qrterq1-hero.glb",
    "lm5157qrterq1-hero.overlay.json",
    "lm5157qrterq1-etched.glb"
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  "component": {
    "mpn": "LM5157QRTERQ1",
    "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-q1",
    "parts": {
      "symbol": "lm5157qrterq1.kicad_sym",
      "footprint": "lm5157qrterq1.kicad_mod",
      "model_3d": "lm5157qrterq1-hero.glb",
      "model_3d_plain": "lm5157qrterq1-etched.glb",
      "model_3d_step": "lm5157qrterq1-etched.step",
      "model_3d_step_plain": "lm5157qrterq1.step",
      "lbr": "lm5157qrterq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C3188429"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T14:33:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "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 of the internal MOSFET driver, requiring a 5-Ω resistor in series with a 1-µF ceramic bypass capacitor to PGND."
      },
      {
        "number": "3",
        "name": "BIAS",
        "type": "power_in",
        "description": "Supply voltage input to the VCC regulator, bypassed to PGND with a capacitor."
      },
      {
        "number": "4",
        "name": "PGOOD",
        "type": "output",
        "description": "Open-drain power-good indicator that goes low when FB is below the undervoltage threshold (VUVTH), requiring a pullup resistor to the system 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 programmable UVLO (must not be left floating, connect to BIAS if unused) and external clock synchronization via a negative pulse input."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin, to be connected 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, with loop compensation components connected between this pin and AGND."
      },
      {
        "number": "9",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the error amplifier, fed by a voltage divider that sets the output voltage in boost, SEPIC, or primary-side regulated flyback topologies, with the low-side resistor close to AGND."
      },
      {
        "number": "10",
        "name": "SS",
        "type": "input",
        "description": "Soft-start time programming pin, where an external capacitor and internal current source set the error amplifier reference ramp rate, with the capacitor ground returned to AGND."
      },
      {
        "number": "11",
        "name": "MODE",
        "type": "input",
        "description": "Mode selection pin, sampled at initial power-up to set hiccup protection and spread spectrum via 0 V/AGND, 37.4 kΩ, 62.0 kΩ, or 100 kΩ resistor (or 370 mV, 620 mV, >1 V levels)."
      },
      {
        "number": "12",
        "name": "SW",
        "type": "output",
        "description": "Switch pin and drain connection of the internal N-channel power MOSFET."
      },
      {
        "number": "13",
        "name": "SW",
        "type": "output",
        "description": "Switch pin and drain connection of the internal N-channel power MOSFET."
      },
      {
        "number": "14",
        "name": "SW",
        "type": "output",
        "description": "Switch pin and 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 datasheet pin table (Table 7-1) gives no electrical type letter for the SW pins (12, 13, 14); 'o; VCC (pin 2) is printed as type P (power); it is both a regulator output and a supply input to the dr; The exposed pad is printed as 'EP', not a numbered pin. It is included as a separate entry with numb",
          "exposed pad 17 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0578,
        "at": "2026-10-17T14:31:42"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5157-q1",
        "pages": 49,
        "sha256": "b17edbd026370cbb",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "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": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm5157qrterq1-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": "dde0708cda8656c6e2754efd168c393e8f64fa45b10432f60337d50100c0599f",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}