UCC28950PW

{
  "schema_version": 1,
  "type": "component",
  "slug": "ucc28950pw",
  "title": "UCC28950PW",
  "brief": "Texas Instruments DC-DC Converters, TSSOP-24. 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)",
    "ucc28950pw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UCC28950PW",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-24",
    "pin_count": 24,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc28950.pdf",
    "parts": {
      "symbol": "ucc28950pw.kicad_sym",
      "footprint": "ucc28950pw.kicad_mod",
      "model_3d": "ucc28950pw-hero.glb",
      "model_3d_plain": "ucc28950pw.glb",
      "model_3d_step": "ucc28950pw-etched.step",
      "model_3d_step_plain": "ucc28950pw.step",
      "lbr": "ucc28950pw.lbr"
    },
    "distributor_links": {
      "lcsc": "C1530014",
      "digikey": "296-34760-5-ND",
      "mouser": "595-UCC28950PW"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T14:37:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-34760-5-ND",
        "status": "found"
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      "mouser": {
        "pn": "595-UCC28950PW",
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      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VREF",
        "type": "power_in",
        "description": "Provides a 5 V, ±1.5%, 20 mA reference voltage output."
      },
      {
        "number": "2",
        "name": "EA+",
        "type": "input",
        "description": "Error amplifier noninverting input."
      },
      {
        "number": "3",
        "name": "EA-",
        "type": "input",
        "description": "Error amplifier inverting input."
      },
      {
        "number": "4",
        "name": "COMP",
        "type": "bidirectional",
        "description": "Error amplifier output and input to the PWM comparator."
      },
      {
        "number": "5",
        "name": "SS/EN",
        "type": "input",
        "description": "Sets soft-start programming, device enable and hiccup mode protection circuit."
      },
      {
        "number": "6",
        "name": "DELAB",
        "type": "input",
        "description": "Sets the dead-time delay between OUTA and OUTB."
      },
      {
        "number": "7",
        "name": "DELCD",
        "type": "input",
        "description": "Sets the dead-time delay between OUTC and OUTD."
      },
      {
        "number": "8",
        "name": "DELEF",
        "type": "input",
        "description": "Sets the delay time between OUTA and OUTF, and between OUTB and OUTE."
      },
      {
        "number": "9",
        "name": "TMIN",
        "type": "input",
        "description": "Sets the minimum duty cycle in burst mode."
      },
      {
        "number": "10",
        "name": "RT",
        "type": "input",
        "description": "Sets the oscillator frequency and the leader or follower mode."
      },
      {
        "number": "11",
        "name": "RSUM",
        "type": "input",
        "description": "Sets the slope compensation and selects voltage mode or peak current mode."
      },
      {
        "number": "12",
        "name": "DCM",
        "type": "input",
        "description": "Sets the DCM threshold."
      },
      {
        "number": "13",
        "name": "ADELEF",
        "type": "input",
        "description": "Programs the delay time between primary side and secondary side switches, tAFSET and tBESET."
      },
      {
        "number": "14",
        "name": "ADEL",
        "type": "input",
        "description": "Programs the primary switch dead time over the CS voltage range, tABSET and tCDSET."
      },
      {
        "number": "15",
        "name": "CS",
        "type": "input",
        "description": "Current sense input for cycle-by-cycle overcurrent protection and adaptive delay functions."
      },
      {
        "number": "16",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Synchronization output from the leader controller to the input of the follower controller."
      },
      {
        "number": "17",
        "name": "OUTF",
        "type": "output",
        "description": "Primary switching output with 0.2 A sink and source capability."
      },
      {
        "number": "18",
        "name": "OUTE",
        "type": "output",
        "description": "Primary switching output with 0.2 A sink and source capability."
      },
      {
        "number": "19",
        "name": "OUTD",
        "type": "output",
        "description": "Primary switching output with 0.2 A sink and source capability."
      },
      {
        "number": "20",
        "name": "OUTC",
        "type": "output",
        "description": "Primary switching output with 0.2 A sink and source capability."
      },
      {
        "number": "21",
        "name": "OUTB",
        "type": "output",
        "description": "Primary switching output with 0.2 A sink and source capability."
      },
      {
        "number": "22",
        "name": "OUTA",
        "type": "output",
        "description": "Primary switching output with 0.2 A sink and source capability."
      },
      {
        "number": "23",
        "name": "VDD",
        "type": "power_in",
        "description": "Bias supply input for the controller."
      },
      {
        "number": "24",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; all signals are referenced to this node."
      }
    ],
    "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 datasheet pin table lists VDD (pin 23) as type 'I'. It is classified here as power_in because it; The datasheet covers UCC28950 and UCC28951, and the pinout is shared. The orderable addendum (page 7; Pin descriptions are condensed from the page 3 pin table and keep its section references out of the "
        ],
        "pages_sent": 7,
        "cost_usd": 0.0545,
        "at": "2026-10-08T14:37:31"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ucc28950.pdf",
        "pages": 80,
        "sha256": "a765d09f25ef27f8",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
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        "footprint_binding": "identity",
        "sha256": "706322f42d9793ebf28d5b80100a68bfa8769998a00b78acadf7af937fc1454f",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-24",
      "Category": "Power Management (PMIC)",
      "Pins": "24"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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          "name": "Input supply voltage, VDD",
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        {
          "name": "Output voltage on OUTA, OUTB, OUTC, OUTD, OUTE, OUTF (max printed as VDD + 0.4 V)",
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        },
        {
          "name": "Input voltage on DELAB, DELCD, DELEF, SS/EN, DCM, TMIN, RT, SYNC, RSUM, EA+, EA-, COMP, CS, ADEL, ADELEF (max printed as VREF + 0.4 V)",
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        {
          "name": "Operating virtual junction temperature",
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          "unit": "°C",
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        {
          "name": "Operating ambient temperature",
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        {
          "name": "Lead temperature (soldering, 10 s)",
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        {
          "name": "Storage temperature",
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          "unit": "°C",
          "min": -65,
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        {
          "name": "Electrostatic discharge, human body model (HBM)",
          "symbol": "V(ESD)",
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          "min": -2000,
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          "conditions": "per ANSI/ESDA/JEDEC JS-001",
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        {
          "name": "Electrostatic discharge, charged device model (CDM)",
          "symbol": "V(ESD)",
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          "unit": "V",
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          "conditions": "per JEDEC JESD22-C101",
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        {
          "name": "Supply voltage, VDD",
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          "typ": 12,
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        {
          "name": "Operating junction temperature",
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          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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        {
          "name": "Converter switching frequency setting",
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          "unit": "kHz",
          "min": 50,
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        },
        {
          "name": "Programmable delay between OUTA, OUTB and OUTC, OUTD set by resistors DELAB and DELCD and parameter KA",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": 30,
          "typ": null,
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        },
        {
          "name": "Maximum duty cycle, UCC28950 (DMAX)",
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          "kind": "recommended_operating",
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          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Programmable delay between OUTA, OUTF and OUTB, OUTE set by resistor DELEF and parameter KEF",
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          "kind": "recommended_operating",
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          "typ": null,
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        },
        {
          "name": "Programmable DCM as percentage of voltage at CS",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "%",
          "min": 5,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Programmable TMIN",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": 100,
          "typ": null,
          "max": 800,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "UVLO start threshold",
          "symbol": "UVLO_RTH",
          "kind": "electrical",
          "unit": "V",
          "min": 6.75,
          "typ": null,
          "max": 7.9,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "UVLO minimum operating voltage after start",
          "symbol": "UVLO_FTH",
          "kind": "electrical",
          "unit": "V",
          "min": 6.15,
          "typ": null,
          "max": 7.2,
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        },
        {
          "name": "UVLO hysteresis",
          "symbol": "UVLO_HYST",
          "kind": "electrical",
          "unit": "V",
          "min": 0.53,
          "typ": null,
          "max": 0.75,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Startup current",
          "symbol": "IDD(off)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 270,
          "conditions": "VDD = 5.2V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating supply current",
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          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VREF total output range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.925,
          "typ": null,
          "max": 5.075,
          "conditions": "0 ≤ IR ≤ 20mA, 8V ≤ VDD ≤ 17V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Short circuit current",
          "symbol": "ISCC",
          "kind": "electrical",
          "unit": "mA",
          "min": -53,
          "typ": null,
          "max": -23,
          "conditions": "VREF = 0V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency FSW(nom), total range",
          "symbol": "FSW(nom)",
          "kind": "electrical",
          "unit": "kHz",
          "min": 92,
          "typ": null,
          "max": 108,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum duty cycle",
          "symbol": "DMAX",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 97,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Synchronization phase, total range",
          "symbol": "PHSYNC",
          "kind": "electrical",
          "unit": "°PH",
          "min": 85,
          "typ": null,
          "max": 95,
          "conditions": "RT = 59kΩ between RT and GND, Input pulses 200kHz, D = 0.5 at SYNC",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Synchronization frequency, total range",
          "symbol": "FSYNC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 180,
          "typ": null,
          "max": 220,
          "conditions": "RT = 59kΩ between RT and 5V; –40 °C ≤ TJ ≤ 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Synchronization pulse width",
          "symbol": "TPW",
          "kind": "electrical",
          "unit": "µs",
          "min": 2.2,
          "typ": null,
          "max": 2.8,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier common-mode input voltage range",
          "symbol": "VICM",
          "kind": "electrical",
          "unit": "V",
          "min": 0.5,
          "typ": null,
          "max": 3.6,
          "conditions": "VICM range ensures parameters; functionality ensured for 3.6V < VICM < VREF + 0.4V, and –0.4V < VICM < 0.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier offset voltage",
          "symbol": "VIO",
          "kind": "electrical",
          "unit": "mV",
          "min": -7,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier input bias current",
          "symbol": "IBIAS",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier high-level output voltage",
          "symbol": "EAHIGH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.9,
          "typ": null,
          "max": null,
          "conditions": "V(EA+) – V(EA–) = 500mV, IEAOUT = –0.5mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier low-level output voltage",
          "symbol": "EALOW",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.35,
          "conditions": "V(EA+) – V(EA–) = –500mV, IEAOUT = 0.5mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier source current",
          "symbol": "ISOURCE",
          "kind": "electrical",
          "unit": "mA",
          "min": -8,
          "typ": null,
          "max": -0.5,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier sink current",
          "symbol": "ISINK",
          "kind": "electrical",
          "unit": "mA",
          "min": 2.7,
          "typ": null,
          "max": 5.75,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "CS pin cycle-by-cycle threshold",
          "symbol": "VCS_LIM",
          "kind": "electrical",
          "unit": "V",
          "min": 1.94,
          "typ": null,
          "max": 2.06,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Discharge current to set cycle-by-cycle current limit duration",
          "symbol": "IDS",
          "kind": "electrical",
          "unit": "µA",
          "min": 15,
          "typ": null,
          "max": 25,
          "conditions": "VCS = 2.5V, VVSS = 4V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Hiccup OFF time threshold",
          "symbol": "VHCC",
          "kind": "electrical",
          "unit": "V",
          "min": 3.2,
          "typ": null,
          "max": 4.2,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Discharge current to set hiccup mode OFF time",
          "symbol": "IHCC",
          "kind": "electrical",
          "unit": "µA",
          "min": 1.9,
          "typ": null,
          "max": 3.2,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Soft-start charge current",
          "symbol": "ISS",
          "kind": "electrical",
          "unit": "µA",
          "min": 20,
          "typ": null,
          "max": 30,
          "conditions": "VSS = 0V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Shutdown, restart threshold",
          "symbol": "VSS_STD",
          "kind": "electrical",
          "unit": "V",
          "min": 0.25,
          "typ": null,
          "max": 0.7,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Pullup threshold",
          "symbol": "VSS_PU",
          "kind": "electrical",
          "unit": "V",
          "min": 3.3,
          "typ": null,
          "max": 4.3,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Clamp voltage",
          "symbol": "VSS_CL",
          "kind": "electrical",
          "unit": "V",
          "min": 4.2,
          "typ": null,
          "max": 4.95,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
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