UCC28084PWR

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  "type": "component",
  "slug": "ucc28084pwr",
  "title": "UCC28084PWR",
  "brief": "Texas Instruments DC-DC Controllers, TSSOP-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 supply chip",
    "ucc28084pwr",
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  "component": {
    "mpn": "UCC28084PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-8",
    "pin_count": 8,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc28084.pdf",
    "parts": {
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    "distributor_links": {
      "lcsc": "C2658597",
      "digikey": "296-UCC28084PWRTR-ND",
      "mouser": "595-UCC28084PWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T07:36:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-UCC28084PWRTR-ND",
        "status": "found",
        "lifecycle": "Active"
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    },
    "pins": [
      {
        "number": "1",
        "name": "OUTA",
        "type": "output",
        "description": "Alternating high-current output stage capable of 500-mA peak source and 1-A peak sink current, switching at half the oscillator frequency."
      },
      {
        "number": "2",
        "name": "VDD",
        "type": "power_in",
        "description": "Power input connection, absolute maximum 15 V (IDD < 10 mA), to be bypassed to GND with a 1-µF ceramic capacitor close to the chip."
      },
      {
        "number": "3",
        "name": "CTRL",
        "type": "input",
        "description": "Error voltage input to the PWM comparator, with an internal divider ratio of 0.45, typically driven from a secondary-side error amplifier through an opto-coupler."
      },
      {
        "number": "4",
        "name": "ISET",
        "type": "input",
        "description": "Current selection for slope compensation, programmed by a resistor RSET to ground (ISLOPE = 5 x ISET, RSET minimum >5 kΩ)."
      },
      {
        "number": "5",
        "name": "CS",
        "type": "input",
        "description": "Current-sense input to the PWM comparator, cycle-by-cycle peak current comparator and overcurrent comparator (0.75 V typ threshold, triggers a soft-start cycle), with an internal MOSFET discharging the filter capacitor."
      },
      {
        "number": "6",
        "name": "RT",
        "type": "input",
        "description": "Oscillator programming pin where an external resistor to ground (25 kΩ to 698 kΩ recommended) sets the frequency, with nominal pin voltage of 1.5 V."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Reference ground and power ground for all functions, requiring a low-impedance circuit board ground plane."
      },
      {
        "number": "8",
        "name": "OUTB",
        "type": "output",
        "description": "Alternating high-current output stage capable of 500-mA peak source and 1-A peak sink current, switching at half the oscillator frequency."
      }
    ],
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        "guard_notes": [
          "extractor flagged: The PW pin numbers were assigned from the page-2 TSSOP top-view drawing, whose text layer lists the ; Internal inconsistency in the datasheet: the TSSOP layout section says 'RT and OUTB (pins 6 and 8)',; The datasheet gives no separate definitions for pin types beyond the terminal functions table; types"
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        "pages_sent": 15,
        "cost_usd": 0.0809,
        "at": "2026-10-11T07:36:02"
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      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ucc28084.pdf",
        "pages": 28,
        "sha256": "19bab60962d5c6f5",
        "source_tier": "mfr"
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-8",
      "Category": "Power Supply Chip",
      "Pins": "8"
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          "name": "Start-up current (VDD < UVLO start threshold voltage)",
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          "name": "Maximum input signal voltage",
          "symbol": "",
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          "unit": "V",
          "min": 0.47,
          "typ": 0.52,
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          "conditions": "CTRL = 5 V, See Note 4",
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          "name": "CS to output delay time",
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          "conditions": "CTRL = 3.5 V, 0 mV ≤ CS ≤ 600 mV",
          "source_page": 4,
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          "name": "Source current (CS pin)",
          "symbol": "",
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          "name": "Sink current (CS pin)",
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          "min": 3,
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          "name": "Overcurrent threshold voltage",
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        {
          "name": "CTRL to CS offset voltage (25°C)",
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          "name": "CTRL to CS offset voltage",
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          "conditions": "CS = 0 V",
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          "name": "Minimum duty cycle",
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          "min": 0,
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          "name": "Low-level output voltage (OUTA or OUTB)",
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          "conditions": "IOUT = 100 mA",
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        {
          "name": "High-level output voltage (OUTA or OUTB), VDD − VOUT",
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          "name": "Fall time",
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          "name": "OUTA/OUTB soft-start interval time (UCC38083/4)",
          "symbol": "",
          "kind": "timing",
          "unit": "ms",
          "min": 1.3,
          "typ": 3.5,
          "max": 8.5,
          "conditions": "CTRL = 1.8 V, CS = 0 V, Duty cycle from 0 to full, See Note 8",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "IRAMP, peak slope compensation current",
          "symbol": "IRAMP",
          "kind": "electrical",
          "unit": "µA",
          "min": 125,
          "typ": 150,
          "max": 175,
          "conditions": "ISET, peak = 30 µA, Full duty cycle",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Supply voltage VDD",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "IDD < 10 mA",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Supply current IDD",
          "symbol": "IDD",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
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          "max": 20,
          "conditions": "",
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          "name": "Sink current (peak) OUTA",
          "symbol": "",
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          "unit": "A",
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        {
          "name": "Sink current (peak) OUTB",
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          "name": "Source current (peak) OUTA",
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        {
          "name": "Source current (peak) OUTB",
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          "name": "RSET (minimum)",
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          "unit": "kΩ",
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          "conditions": "soldering 10 seconds",
          "source_page": 3,
          "source": "datasheet"
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          "name": "Operating free-air temperature range (UCC28084 option)",
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          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Thermal resistance junction-to-case, TSSOP-8 (PW)",
          "symbol": "θjc",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 32,
          "max": null,
          "conditions": "Modeled data, See Note 2",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Thermal resistance junction-to-ambient, TSSOP-8 (PW)",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": 232,
          "typ": null,
          "max": 257,
          "conditions": "Modeled data; lower value for 3x3 inch, higher for 1x1 inch ground plane, See Note 2",
          "source_page": 2,
          "source": "datasheet"
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