TPS54478RTER

{
  "slug": "tps54478rter",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, WQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "tps54478rter",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tps54478rter.kicad_sym",
    "tps54478rter.kicad_mod",
    "tps54478rter.glb",
    "tps54478rter.step",
    "tps54478rter.lbr",
    "docs/hero.png",
    "docs/tps54478rter-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tps54478rter-hero.glb",
    "tps54478rter-hero.overlay.json"
  ],
  "component": {
    "mpn": "TPS54478RTER",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-16-EP(3x3)",
    "pin_count": 17,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tps54478",
    "parts": {
      "symbol": "tps54478rter.kicad_sym",
      "footprint": "tps54478rter.kicad_mod",
      "model_3d": "tps54478rter-hero.glb",
      "model_3d_plain": "tps54478rter.glb",
      "model_3d_step": "tps54478rter-etched.step",
      "model_3d_step_plain": "tps54478rter.step",
      "lbr": "tps54478rter.lbr"
    },
    "distributor_links": {
      "lcsc": "C2865349",
      "digikey": "296-42700-2-ND",
      "mouser": "595-TPS54478RTER"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T23:34:58Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-42700-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-TPS54478RTER",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage, 2.95 V to 6 V."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage, 2.95 V to 6 V."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; this pin should be electrically connected directly to the power pad under the IC."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; this pin should be electrically connected directly to the power pad under the IC."
      },
      {
        "number": "5",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground should be electrically connected to GND close to the device."
      },
      {
        "number": "6",
        "name": "VSENSE",
        "type": "input",
        "description": "Inverting node of the transconductance (gm) error amplifier."
      },
      {
        "number": "7",
        "name": "COMP",
        "type": "bidirectional",
        "description": "Error amplifier output and input to the output switch current comparator; frequency compensation components connect to this pin."
      },
      {
        "number": "8",
        "name": "RT/CLK",
        "type": "input",
        "description": "Resistor timing or external clock input; the RT/CLK pin is typically 0.5 V, and the synchronization square wave must transition below 0.6 V and above 1.6 V typically."
      },
      {
        "number": "9",
        "name": "SS/TR",
        "type": "input",
        "description": "Slow start and tracking pin; an external capacitor sets the output voltage rise time, and higher charge current applies when SS is below 0.15 V."
      },
      {
        "number": "10",
        "name": "PH",
        "type": "output",
        "description": "Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET."
      },
      {
        "number": "11",
        "name": "PH",
        "type": "output",
        "description": "Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET."
      },
      {
        "number": "12",
        "name": "PH",
        "type": "output",
        "description": "Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET."
      },
      {
        "number": "13",
        "name": "BOOT",
        "type": "output",
        "description": "A bootstrap capacitor is required between BOOT and PH; if its voltage falls below the BOOT UVLO minimum, the output is forced to switch off until the capacitor is refreshed."
      },
      {
        "number": "14",
        "name": "PWRGD",
        "type": "output",
        "description": "Open-drain output that asserts low if the output voltage is low due to thermal shutdown, overcurrent, over/under-voltage, or EN shutdown."
      },
      {
        "number": "15",
        "name": "EN",
        "type": "input",
        "description": "Enable pin with internal pull-up current source; pull below 1.21 V to disable and float to enable, and two additional resistors can set the on/off threshold (adjust UVLO)."
      },
      {
        "number": "17",
        "name": "Thermal Pad",
        "type": "power_in",
        "description": "GND pin should be connected to the exposed thermal pad for proper operation, and the pad should be connected to an internal PCB ground plane using multiple vias."
      },
      {
        "number": "16",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage, 2.95 V to 6 V."
      }
    ],
    "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 lists VIN as type 'I'; mapped to KiCad power_in because it is the main supply input. C; The datasheet lists AGND as a plain ground pin with no I/O type; mapped to power_in to match the gro; The datasheet gives BOOT and PH as type 'O'; they are mapped to KiCad output, though PH is a switchi"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0613,
        "at": "2026-10-10T23:34:45"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tps54478",
        "pages": 43,
        "sha256": "efbe291862db5c5d",
        "source_tier": "lcsc"
      },
      "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": "tps54478rter.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": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps54478rter-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": "f3d26d547dbd663ca9fb330b75d26e2ac8492b7b4e5ff2258f246c87776ef4dc",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}