UCC28251PWR

{
  "slug": "ucc28251pwr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers & Regulators, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "ucc28251pwr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "README.md",
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    "ucc28251pwr.kicad_mod",
    "ucc28251pwr.glb",
    "ucc28251pwr.step",
    "ucc28251pwr.lbr",
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    "docs/ucc28251pwr-datasheet.pdf",
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    "viewers/footprint.html",
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    "ucc28251pwr-etched.glb"
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  "component": {
    "mpn": "UCC28251PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Power Management ICs",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc28251.pdf",
    "parts": {
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      "footprint": "ucc28251pwr.kicad_mod",
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      "lbr": "ucc28251pwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C702428",
      "digikey": "296-41053-2-ND",
      "mouser": "595-UCC28251PWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T09:30:28Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-41053-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-UCC28251PWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VSENSE",
        "type": "input",
        "description": "Output voltage sensing input for pre-bias control, with input range 0 to 3.3 V."
      },
      {
        "number": "2",
        "name": "RT",
        "type": "input",
        "description": "Oscillator frequency set resistor to ground or synchronous clock input, with RT resistor range 12.5 to 200 kΩ."
      },
      {
        "number": "3",
        "name": "RAMP/CS",
        "type": "input",
        "description": "PWM ramp input for voltage mode control or current sense input for current mode control, with voltage range 0 to 2.3 V."
      },
      {
        "number": "4",
        "name": "ILIM",
        "type": "input",
        "description": "Current sense input for cycle-by-cycle over-current protection, terminating the OUTA/OUTB pulse when above 0.5 V."
      },
      {
        "number": "5",
        "name": "EN",
        "type": "input",
        "description": "Device enable and disable input; pull to VREF if the enable function is not used."
      },
      {
        "number": "6",
        "name": "OVP/OTP",
        "type": "input",
        "description": "Over-voltage and over-temperature protection input that causes a fault shutdown when above 0.7 V."
      },
      {
        "number": "7",
        "name": "VREF",
        "type": "power_out",
        "description": "3.3-V reference output, requiring a 0.47 to 2.20 µF bypass capacitor."
      },
      {
        "number": "8",
        "name": "REF/EA+",
        "type": "input",
        "description": "Error amplifier non-inverting input with common mode range 0 to 3.0 V."
      },
      {
        "number": "9",
        "name": "FB/EA-",
        "type": "input",
        "description": "Error amplifier inverting input with common mode range 0 to 3.0 V."
      },
      {
        "number": "10",
        "name": "COMP",
        "type": "bidirectional",
        "description": "Error amplifier output, with 6.5 mA typical sink current and 4.5 mA typical source current."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "12",
        "name": "VDD",
        "type": "power_in",
        "description": "Bias supply input, 4.7 to 17 V recommended with at least 1 µF bypass capacitor."
      },
      {
        "number": "13",
        "name": "SRB",
        "type": "output",
        "description": "0.2-A sink/source synchronous rectifier output."
      },
      {
        "number": "14",
        "name": "SRA",
        "type": "output",
        "description": "0.2-A sink/source synchronous rectifier output."
      },
      {
        "number": "15",
        "name": "OUTB",
        "type": "output",
        "description": "0.2-A sink/source primary switching output."
      },
      {
        "number": "16",
        "name": "OUTA",
        "type": "output",
        "description": "0.2-A sink/source primary switching output."
      },
      {
        "number": "17",
        "name": "HICC",
        "type": "input",
        "description": "Cycle-by-cycle current limit time delay and hiccup time setting pin, programmed by a capacitor to ground."
      },
      {
        "number": "18",
        "name": "PS",
        "type": "input",
        "description": "Primary off to synchronous rectifier on dead-time set, with resistor range 5 to 250 kΩ."
      },
      {
        "number": "19",
        "name": "SP",
        "type": "input",
        "description": "Synchronous rectifier off to primary on dead-time set, with resistor range 5 to 250 kΩ."
      },
      {
        "number": "20",
        "name": "SS",
        "type": "bidirectional",
        "description": "Soft-start programming pin with 28 µA typical charge current, clamped at 3.6 V typical."
      }
    ],
    "provenance": {
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      "factory_chain": {
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        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 16,
        "cost_usd": 0.1509,
        "at": "2026-10-31T09:30:15"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ucc28251.pdf",
        "pages": 58,
        "sha256": "67008ba993940d0e",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.5,
          1.2
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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    "package_dims": {
      "package_code": "PW0020A",
      "source_page": 51,
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      },
      "E1": {
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      "e": {
        "nom_mm": 0.65,
        "range_mm": [
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      },
      "A": {
        "nom_mm": 1.2,
        "range_mm": [
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        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
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        "verdict": "PASS",
        "reasons": [
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}