UCC3809D-2

{
  "schema_version": 1,
  "type": "component",
  "slug": "ucc3809d-2",
  "title": "UCC3809D-2",
  "brief": "Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "ucc3809d-2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UCC3809D-2",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ucc2809-2",
    "parts": {
      "symbol": "ucc3809d-2.kicad_sym",
      "footprint": "ucc3809d-2.kicad_mod",
      "model_3d": "ucc3809d-2-hero.glb",
      "model_3d_plain": "ucc3809d-2.glb",
      "model_3d_step": "ucc3809d-2-etched.step",
      "model_3d_step_plain": "ucc3809d-2.step",
      "lbr": "ucc3809d-2.lbr"
    },
    "distributor_links": {
      "lcsc": "C2862468",
      "digikey": "2156-UCC3809D-2-TI-ND",
      "mouser": "595-UCC3809D-2"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T20:16:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-UCC3809D-2-TI-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UCC3809D-2",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "FB",
        "type": "input",
        "description": "Summing node for current sense feedback, optocoupler voltage feedback and slope compensation, compared to a 1V threshold, with an internal 250 ohm NMOS discharging any external filter capacitor during PWM off time."
      },
      {
        "number": "2",
        "name": "SS",
        "type": "bidirectional",
        "description": "Soft start pin where the timing capacitor is charged by an internal 6µA source, and taking it below 0.5V inhibits the output driver, turns off the 5V reference and drops IVDD below 100µA."
      },
      {
        "number": "3",
        "name": "RT1",
        "type": "passive",
        "description": "Connects to timing resistor RT1 that sets the oscillator positive ramp time Tr = 0.74 x (CT + 27pF) x RT1, with a recommended minimum of 10kΩ."
      },
      {
        "number": "4",
        "name": "RT2",
        "type": "passive",
        "description": "Connects to timing resistor RT2 that sets the oscillator negative ramp time Tf = 0.74 x (CT + 27pF) x RT2, with a recommended minimum of 4.32kΩ."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Reference ground and power ground for all functions."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "High current totem pole power driver output (0.4A source/0.8A sink) for N-channel MOSFETs, with a minimum series gate resistor of 3.9 ohms recommended."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Power input shunt regulated at 17.5V (absolute maximum 19V) that should be bypassed with a 1µF ceramic capacitor."
      },
      {
        "number": "8",
        "name": "REF",
        "type": "power_out",
        "description": "Internal buffered 5V reference output (4.75V to 5.25V) that should be bypassed with a 0.47µF ceramic capacitor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: UCC3809D-2 is not listed by name in the tape-and-reel tables, but the addendum lists UCC3809D-2 as S; The datasheet does not state the electrical type of SS, RT1 and RT2. The types chosen (bidirectional",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 24,
        "cost_usd": 0.3303,
        "at": "2026-10-08T20:15:19"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ucc2809-2",
        "pages": 24,
        "sha256": "7fc852aa75a77966",
        "source_tier": "lcsc"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "ucc3809d-2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ucc3809d-2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "0eace5911b2978856de85bae71a9eb455da41b313c98472ce10d55fcd96aaebc",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ucc3809d-2"
  ],
  "discovery_pitch": "UCC3809D-2 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ucc3809d-2.kicad_sym",
    "ucc3809d-2.kicad_mod",
    "ucc3809d-2.glb",
    "ucc3809d-2.step",
    "ucc3809d-2.lbr",
    "docs/hero.png",
    "docs/ucc3809d-2-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ucc3809d-2-hero.glb",
    "ucc3809d-2-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}