UCC28C57LQDRQ1

{
  "slug": "ucc28c57lqdrq1",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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  "component": {
    "mpn": "UCC28C57LQDRQ1",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc28c57lqdrq1.pdf",
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    "distributor_links": {
      "lcsc": 20346046,
      "digikey": "296-UCC28C57LQDRQ1TR-ND",
      "mouser": "595-UCC28C57LQDRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T19:14:18Z",
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    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Output of the error amplifier for compensation; internally current limited to allow commanding zero duty cycle by forcing COMP to GND."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Inverting input to the error amplifier with noninverting input internally trimmed to 2.5 V ±1% for controlling power converter voltage-feedback loop stability."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Primary-side current sense pin and noninverting input to the PWM comparator; receives signal from current sensing resistor and can have voltage ramp applied for voltage mode control."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Fixed frequency oscillator set point where timing resistor connects to VREF and timing capacitor connects to GND to set switching frequency."
      },
      {
        "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": "Output of the on-chip drive stage intended to directly drive a MOSFET with peak currents up to 1 A; in UCC28C57H/L-Q1 the frequency is one-half the oscillator frequency and maximum duty cycle is limited to less than 50%."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Analog controller bias input providing power to the device with maximum absolute voltage rating of 30 V; total VDD current is the sum of quiescent VDD current and average OUT current, requiring bypass capacitor of typically 0.1 µF directly to GND."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "5-V reference voltage output used to provide charging current to the oscillator timing capacitor through the timing resistor with ±1% accuracy."
      }
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        "pages_sent": 12,
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        "at": "2026-10-05T19:14:04"
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      "pins": {
        "total": 8,
        "described": 8,
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