UCC38C42DGKR

{
  "slug": "ucc38c42dgkr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Controllers, VSSOP-8-0.65mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "ucc38c42dgkr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ucc38c42dgkr.kicad_sym",
    "ucc38c42dgkr.kicad_mod",
    "ucc38c42dgkr.glb",
    "ucc38c42dgkr.step",
    "ucc38c42dgkr.lbr",
    "docs/hero.png",
    "docs/ucc38c42dgkr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ucc38c42dgkr-hero.glb",
    "ucc38c42dgkr-hero.overlay.json"
  ],
  "component": {
    "mpn": "UCC38C42DGKR",
    "manufacturer": "Texas Instruments",
    "package": "VSSOP-8-0.65mm",
    "pin_count": 8,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc38c42.pdf",
    "parts": {
      "symbol": "ucc38c42dgkr.kicad_sym",
      "footprint": "ucc38c42dgkr.kicad_mod",
      "model_3d": "ucc38c42dgkr-hero.glb",
      "model_3d_plain": "ucc38c42dgkr.glb",
      "model_3d_step": "ucc38c42dgkr-etched.step",
      "model_3d_step_plain": "ucc38c42dgkr.step",
      "lbr": "ucc38c42dgkr.lbr"
    },
    "distributor_links": {
      "lcsc": "C544755",
      "digikey": "296-28736-2-ND",
      "mouser": "595-UCC38C42DGKR"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T16:01:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-28736-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UCC38C42DGKR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output for loop compensation; the error amplifier is internally current limited, so zero duty cycle can be commanded by externally forcing COMP to GND."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the error amplifier, used to close the voltage-feedback loop, while the noninverting input is internally trimmed to 2.5V ±1%."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Primary-side current sense input to the PWM comparator that terminates OUT conduction, connected to the MOSFET source sense resistor."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Oscillator set point where timing resistor RRT connects to VREF and timing capacitor CCT connects to GND to set the switching frequency and maximum duty cycle."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return pin for the output driver stage and the logic-level controller section."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "Totem-pole output that drives a MOSFET directly, sourcing and sinking up to 1A peak, and is actively held low when VDD is below the turn-on threshold."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Analog controller bias supply input with an absolute maximum of 20V, requiring a bypass capacitor of typically 0.1µF connected directly to GND with minimal trace length."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "5V reference output (±1% tolerance) that must be bypassed to GND with a ceramic capacitor of at least 0.1µF placed as close to the pin as possible."
      }
    ],
    "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 DGK (VSSOP-8) pinout is taken from Figure 5-2 and Table 5-1 on page 4. The datasheet's pin table; The orderable addendum (page 46) lists UCC38C42DGKR with status NRND (not recommended for new design; The MPN UCC38C42DGKR matches the UCC38C42 family in the 0 to 85°C range, and the package is DGK (VSS"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0925,
        "at": "2026-10-10T16:01:42"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ucc38c42.pdf",
        "pages": 60,
        "sha256": "9fa55f996731c56b",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
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        "file": "ucc38c42dgkr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.1,
          2.0,
          0.85
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "353552981eef35cb93635057d4aeb89aef22648c77af6fd095e328bfe6b834bd",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ucc38c42dgkr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.1,
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        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "488002457331278780a79aca5d5f59a0a98be312d3aa2d5b764c09b6ab25e726",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}