UC2844G-S08-R

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc2844g-s08-r",
  "title": "UC2844G-S08-R",
  "brief": "UTC(Unisonic Tech) DC-DC Controllers, SOP-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": [
    "component",
    "power management ics",
    "uc2844g-s08-r",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC2844G-S08-R",
    "manufacturer": "UTC(Unisonic Tech)",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/82d646082b5b271b20a836479dafe09d.pdf",
    "parts": {
      "symbol": "uc2844g-s08-r.kicad_sym",
      "footprint": "uc2844g-s08-r.kicad_mod",
      "model_3d": "uc2844g-s08-r-hero.glb",
      "model_3d_plain": "uc2844g-s08-r-etched.glb",
      "model_3d_step": "uc2844g-s08-r-etched.step",
      "model_3d_step_plain": "uc2844g-s08-r.step",
      "lbr": "uc2844g-s08-r.lbr"
    },
    "distributor_links": {
      "lcsc": "C2978928"
    },
    "distributor_check": {
      "checked_at": "2026-11-06T08:28:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Compensation",
        "type": "output",
        "description": "Error amplifier output, made available for loop compensation."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Voltage feedback, the inverting input of the error amplifier, normally connected to the supply output through a resistor divider (max input -0.3 to +5.5 V)."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current sense input receiving a voltage proportional to inductor current, used by the PWM to terminate output switch conduction (max input -0.3 to +5.5 V)."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to Vref and capacitor CT to ground."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground."
      },
      {
        "number": "6",
        "name": "Output",
        "type": "output",
        "description": "Directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1 A, switching at one-half the oscillator frequency."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply (UC2844 UVLO thresholds 16 V on and 10 V off)."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "5.0 V reference output that provides charging current for capacitor CT through resistor RT."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "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": [
          "extractor flagged: The pin configuration drawing is not in the extracted text, so the pin numbers come from the pin des"
        ],
        "pages_sent": 7,
        "cost_usd": 0.038,
        "at": "2026-11-06T08:28:38"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/82d646082b5b271b20a836479dafe09d.pdf",
        "pages": 7,
        "sha256": "ad43141a5676bb47",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "uc2844g-s08-r.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-11-06",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2844g-s08-r-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9ae1aa9bfaa836e2cd01a726f86c991a722f953d28689ed9f40406031f3ce9bc",
        "checked": "2026-11-06",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC(Unisonic Tech)",
      "Package": "SOP-8",
      "Category": "Power Management ICs",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "ad43141a5676bb47dbc64f3dda16d8001b74285a29dd61f7596589bdc37891c9",
      "rows": [
        {
          "name": "Total Power Supply and Zener Current",
          "symbol": "ICC+Iz",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Current, Source or Sink",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Note 2",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Energy (Capacitive Load per cycle)",
          "symbol": "W",
          "kind": "absolute_maximum",
          "unit": "μJ",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current Sense and Voltage feedback Inputs",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Output Sink Current",
          "symbol": "ISINK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 862,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "TJ(OPR)",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Output Voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.95,
          "typ": 5,
          "max": 5.05,
          "conditions": "IOUT=1.0mA,TJ=25 C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 20,
          "conditions": "VCC=12V ~ 25V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 25,
          "conditions": "IOUT=1.0mA ~ 20mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Total Output Variation over Line, Load, Temperature",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.9,
          "typ": null,
          "max": 5.1,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Short Circuit Current",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": -180,
          "typ": -85,
          "max": -30,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Discharge Current",
          "symbol": "IDSG",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 10.8,
          "max": null,
          "conditions": "VOSC=2.0V, TJ=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 47,
          "typ": 52,
          "max": 57,
          "conditions": "TJ=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency over temperature range",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 46,
          "typ": null,
          "max": 60,
          "conditions": "TLOW ≤ TA ≤ THI",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Frequency Change with Voltage",
          "symbol": "ΔfOSC/ΔV",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "VCC=12V ~ 25V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Frequency Change with Temperature",
          "symbol": "ΔfOSC/ΔT",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "TLOW ≤ TA ≤ THI",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Voltage Feedback Input",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 2.45,
          "typ": 2.5,
          "max": 2.55,
          "conditions": "VOUT=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Swing High",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": null,
          "max": 6.2,
          "conditions": "RL=15k to ground, VFB=2.3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Swing Low",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": null,
          "max": 1.1,
          "conditions": "RL=15k to VREF, VFB=2.7V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Sink Output Current",
          "symbol": "ISINK",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": null,
          "max": 12,
          "conditions": "VOUT=1.1V, VFB=2.7V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Source Output Current",
          "symbol": "ISOURCE",
          "kind": "electrical",
          "unit": "mA",
          "min": -1,
          "typ": null,
          "max": -0.5,
          "conditions": "VOUT=5.0V, VFB=2.3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current",
          "symbol": "II(BIAS)",
          "kind": "electrical",
          "unit": "μA",
          "min": -1,
          "typ": null,
          "max": -0.1,
          "conditions": "VFB=2.7V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Open Loop Voltage Gain",
          "symbol": "GVO",
          "kind": "electrical",
          "unit": "dB",
          "min": 65,
          "typ": null,
          "max": 90,
          "conditions": "VOUT=2.0V ~ 4.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Rejection Ratio (error amp)",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": null,
          "max": 70,
          "conditions": "VCC=12V ~ 25V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Unity Gain Bandwidth",
          "symbol": "GBW",
          "kind": "electrical",
          "unit": "MHz",
          "min": 0.7,
          "typ": null,
          "max": 1,
          "conditions": "TJ=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance (Junction-to-Air)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 145,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current Sense Input Voltage Gain",
          "symbol": "GV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 2.85,
          "typ": 3,
          "max": 3.15,
          "conditions": "Note 2 & 3",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Current Sense Input Threshold",
          "symbol": "VI(THR)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "Note 2",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Current Sense Input Bias Current",
          "symbol": "II(BIAS)",
          "kind": "electrical",
          "unit": "μA",
          "min": -10,
          "typ": null,
          "max": -2,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay",
          "symbol": "tPLH(IN/OUT)",
          "kind": "timing",
          "unit": "ns",
          "min": 150,
          "typ": null,
          "max": 300,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Low",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": 0.1,
          "typ": null,
          "max": 0.4,
          "conditions": "ISINK=20mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Low",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": 1.6,
          "typ": null,
          "max": 2.2,
          "conditions": "ISINK=200mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage High",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 13,
          "typ": null,
          "max": 13.5,
          "conditions": "ISINK=20mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage High",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 12,
          "typ": null,
          "max": 13.4,
          "conditions": "ISINK=200mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage with UVLO Activated",
          "symbol": "VOL(UVLO)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.1,
          "typ": null,
          "max": 1.1,
          "conditions": "VCC=6.0V, ISINK=1.0mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Rise Time",
          "symbol": "tR",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": null,
          "max": 150,
          "conditions": "CL=1.0nF,TJ=25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Fall Time",
          "symbol": "tF",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": null,
          "max": 150,
          "conditions": "CL=1.0nF,TJ=25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Startup Threshold (UC2844)",
          "symbol": "VTHR",
          "kind": "electrical",
          "unit": "V",
          "min": 15,
          "typ": 16,
          "max": 17,
          "conditions": "UC2844",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Minimum Operating Voltage After Turn-On (UC2844)",
          "symbol": "VCC(MIN)",
          "kind": "electrical",
          "unit": "V",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "UC2844",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Max Duty Cycle",
          "symbol": "DCMAX",
          "kind": "electrical",
          "unit": "%",
          "min": 47,
          "typ": 48,
          "max": 50,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Zener Voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": 30,
          "typ": 36,
          "max": null,
          "conditions": "ICC=25mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Current (UC2844)",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": 12,
          "typ": null,
          "max": 17,
          "conditions": "VCC=14V",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "uc2844g-s08-r"
  ],
  "discovery_pitch": "UC2844G-S08-R (UTC(Unisonic Tech)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc2844g-s08-r.kicad_sym",
    "uc2844g-s08-r.kicad_mod",
    "uc2844g-s08-r.glb",
    "uc2844g-s08-r.step",
    "uc2844g-s08-r.lbr",
    "docs/hero.png",
    "docs/uc2844g-s08-r-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2844g-s08-r-hero.glb",
    "uc2844g-s08-r-hero.overlay.json",
    "uc2844g-s08-r-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}