UCC2809DTR-2

{
  "schema_version": 1,
  "type": "component",
  "slug": "ucc2809dtr-2",
  "title": "UCC2809DTR-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": [
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    "power management (pmic)",
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  "component": {
    "mpn": "UCC2809DTR-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": {
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      "lbr": "ucc2809dtr-2.lbr"
    },
    "distributor_links": {
      "lcsc": "C2863022",
      "digikey": "296-38324-2-ND",
      "mouser": "595-UCC2809DTR-2"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T16:30:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-38324-2-ND",
        "status": "found"
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        "pn": "595-UCC2809DTR-2",
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    },
    "pins": [
      {
        "number": "1",
        "name": "FB",
        "type": "input",
        "description": "Summing node for current-sense feedback, optocoupler voltage feedback and slope compensation, compared against a 1 V threshold; an internal 250 Ω NMOS discharges external leading-edge-blanking capacitance during the PWM off time."
      },
      {
        "number": "2",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start timing capacitor node charged by an internal 6 µA source; the output driver is held low while SS is below 0.5 V (shutdown threshold 0.44-0.52 V), and the duty cycle ramps as SS charges from 1 V to 2 V."
      },
      {
        "number": "3",
        "name": "RT1",
        "type": "passive",
        "description": "Timing resistor RT1 connection that sets the positive ramp time of the oscillator, Tr = 0.74 × (CT + 27 pF) × RT1, with a recommended minimum of 10 kΩ."
      },
      {
        "number": "4",
        "name": "RT2",
        "type": "passive",
        "description": "Timing resistor RT2 connection that sets the negative ramp time of the oscillator, Tf = 0.74 × (CT + 27 pF) × RT2, with a recommended minimum of 4.32 kΩ."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Reference ground and power ground for all functions of the device."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "High-current totem-pole gate driver output for an N-channel MOSFET, rated -0.4 A to 0.8 A (tpw < 1 µs, duty cycle < 10%), with a minimum series gate resistor of 3.9 Ω recommended at high bias voltages."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply input shunt-regulated at 17.5 V (VDD clamp 16-19 V at 10 mA), with an absolute maximum rating of 19 V, to be bypassed with a 1 µF ceramic capacitor."
      },
      {
        "number": "8",
        "name": "REF",
        "type": "power_out",
        "description": "Internal buffered 5 V reference output (4.75-5.25 V at IREF = 0 mA, IREF limited to -15 mA absolute maximum), to be bypassed with at least 0.47 µF ceramic capacitor."
      }
    ],
    "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 SOIC-8 pin numbers were inferred from the scrambled text extraction of the page 2 top-view diagr"
        ],
        "pages_sent": 24,
        "cost_usd": 0.1075,
        "at": "2026-10-08T16:30:14"
      },
      "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,
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        "refuses_to_fabricate": true
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        "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)"
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      {
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        "sha256": "8f1f875a6811631717a8c8df1492680fbc71a2a80e1fc81f6432684ce9515e3d",
        "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": [],
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  "discovery_pitch": "UCC2809DTR-2 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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