UC2844BNG

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc2844bng",
  "title": "UC2844BNG",
  "brief": "onsemi AC-DC Controllers And Regulators, DIP-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 (pmic)",
    "uc2844bng",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC2844BNG",
    "manufacturer": "onsemi",
    "package": "DIP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911743745998848",
    "parts": {
      "symbol": "uc2844bng.kicad_sym",
      "footprint": "uc2844bng.kicad_mod",
      "model_3d": "uc2844bng-hero.glb",
      "model_3d_plain": "uc2844bng-etched.glb",
      "model_3d_step": "uc2844bng-etched.step",
      "model_3d_step_plain": "uc2844bng.step",
      "lbr": "uc2844bng.lbr"
    },
    "distributor_links": {
      "lcsc": "C32591",
      "digikey": "UC2844BNGOS-ND",
      "mouser": "863-UC2844BNG"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T07:52:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "UC2844BNGOS-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "863-UC2844BNG",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Compensation",
        "type": "output",
        "description": "This pin is the Error Amplifier output and is made available for loop compensation."
      },
      {
        "number": "2",
        "name": "Voltage Feedback",
        "type": "input",
        "description": "This is the inverting input of the Error Amplifier and is normally connected to the switching power supply output through a resistor divider."
      },
      {
        "number": "3",
        "name": "Current Sense",
        "type": "input",
        "description": "A voltage proportional to inductor current is connected to this input, and the PWM uses it to terminate the output switch conduction."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Resistor RT connects to Vref and capacitor CT connects to ground to program the oscillator frequency and maximum output duty cycle; oscillator operation to 1.0 kHz is possible."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "This pin is the combined control circuitry and power ground."
      },
      {
        "number": "6",
        "name": "Output",
        "type": "output",
        "description": "This output directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1.0 A, and switches at one-half the oscillator frequency."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "This pin is the positive supply of the control IC."
      },
      {
        "number": "8",
        "name": "Vref",
        "type": "power_out",
        "description": "This is the reference output, which 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-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 function table lists 'Power Ground' only against the 14-pin (SOIC-14) column, so t; Pin types were assigned from the functional descriptions because the datasheet gives no explicit ele; Page 1 gives the PDIP-8 pin connections and page 6 gives the pin function descriptions. Ordering tab"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0654,
        "at": "2026-10-15T07:52:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911743745998848",
        "pages": 19,
        "sha256": "e69ff39fc0ea9e08",
        "source_tier": "lcsc"
      },
      "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": "uc2844bng.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2844bng-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "892cdb1795e576737d5503b7fcdc1d171b8f4e327e1b80cb57f200f1a13917f4",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "DIP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e69ff39fc0ea9e08b6cc793079758f8b8c31ec7867bcd8b9b8e15e2b5d68bb6d",
      "rows": [
        {
          "name": "Bias and Driver Voltages (VCC, VC)",
          "symbol": "VCC, VC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Zero series impedance (Note 1)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Total Power Supply and Zener Current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "ICC + IZ",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current, Source or Sink",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Note 2",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Energy (Capacitive Load per Cycle)",
          "symbol": "W",
          "kind": "absolute_maximum",
          "unit": "J",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 2,
          "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": 2,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Output Sink Current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Power Dissipation, N Suffix PDIP-8",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.25,
          "conditions": "TA = 25°C, N suffix Case 626",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -25,
          "typ": null,
          "max": 85,
          "conditions": "UC2844B, UC2845B",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Air, N Suffix PDIP-8",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "N suffix Case 626",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference Output Voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 4.95,
          "typ": 5,
          "max": 5.05,
          "conditions": "IO = 1.0 mA, TJ = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "Regline",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 20,
          "conditions": "VCC = 12 V to 25 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "Regload",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 25,
          "conditions": "IO = 1.0 mA to 20 mA",
          "source_page": 2,
          "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": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Short Circuit Current",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": -30,
          "typ": -85,
          "max": -180,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 49,
          "typ": 52,
          "max": 55,
          "conditions": "TJ = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 48,
          "typ": null,
          "max": 56,
          "conditions": "TA = Tlow to Thigh",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 225,
          "typ": 250,
          "max": 275,
          "conditions": "TJ = 25°C (RT = 6.2 k, CT = 1.0 nF)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Frequency Change with Voltage",
          "symbol": "fOSC/V",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "VCC = 12 V to 25 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Discharge Current",
          "symbol": "Idischg",
          "kind": "electrical",
          "unit": "mA",
          "min": 7.8,
          "typ": 8.3,
          "max": 8.8,
          "conditions": "VOSC = 2.0 V; TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Discharge Current",
          "symbol": "Idischg",
          "kind": "electrical",
          "unit": "mA",
          "min": 7.5,
          "typ": null,
          "max": 8.8,
          "conditions": "VOSC = 2.0 V; TA = Tlow to Thigh (UC284XB, UC384XB)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage Feedback Input",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 2.45,
          "typ": 2.5,
          "max": 2.55,
          "conditions": "VO = 2.5 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current",
          "symbol": "IIB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": -0.1,
          "max": -1,
          "conditions": "VFB = 5.0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Open Loop Voltage Gain",
          "symbol": "AVOL",
          "kind": "electrical",
          "unit": "dB",
          "min": 65,
          "typ": 90,
          "max": null,
          "conditions": "VO = 2.0 V to 4.0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Unity Gain Bandwidth",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "MHz",
          "min": 0.7,
          "typ": 1,
          "max": null,
          "conditions": "TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Rejection Ratio (Error Amp)",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 70,
          "max": null,
          "conditions": "VCC = 12 V to 25 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Current - Sink",
          "symbol": "ISink",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": 12,
          "max": null,
          "conditions": "VO = 1.1 V, VFB = 2.7 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Current - Source",
          "symbol": "ISource",
          "kind": "electrical",
          "unit": "mA",
          "min": -0.5,
          "typ": null,
          "max": -1,
          "conditions": "VO = 5.0 V, VFB = 2.3 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage High State",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": 6.2,
          "max": null,
          "conditions": "RL = 15 k to ground, VFB = 2.3 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Low State",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.8,
          "max": 1.1,
          "conditions": "RL = 15 k to Vref, VFB = 2.7 V (UC284XB, UC384XB)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Sense Input Voltage Gain",
          "symbol": "AV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 2.85,
          "typ": 3,
          "max": 3.15,
          "conditions": "Notes 9 & 10",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Current Sense Input Threshold",
          "symbol": "Vth",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "Note 9: measured at latch trip point with VFB = 0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current (Current Sense)",
          "symbol": "IIB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": -2,
          "max": -10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay (Current Sense Input to Output)",
          "symbol": "tPLH(In/Out)",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 150,
          "max": 300,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Low State",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 0.4,
          "conditions": "ISink = 20 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Low State",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.6,
          "max": 2.2,
          "conditions": "ISink = 200 mA (UC284XB, UC384XB)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage High State",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 13,
          "typ": 13.5,
          "max": null,
          "conditions": "ISource = 20 mA (UC284XB, UC384XB)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage High State",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 12,
          "typ": 13.4,
          "max": null,
          "conditions": "ISource = 200 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage with UVLO Activated",
          "symbol": "VOL(UVLO)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 1.1,
          "conditions": "VCC = 6.0 V, ISink = 1.0 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Rise Time",
          "symbol": "tr",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "CL = 1.0 nF, TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Fall Time",
          "symbol": "tf",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "CL = 1.0 nF, TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Startup Threshold (UCX844B)",
          "symbol": "Vth",
          "kind": "electrical",
          "unit": "V",
          "min": 15,
          "typ": 16,
          "max": 17,
          "conditions": "UCX844B",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum Operating Voltage After Turn-On (UCX844B)",
          "symbol": "VCC(min)",
          "kind": "electrical",
          "unit": "V",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "UCX844B",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Duty Cycle",
          "symbol": "DC(max)",
          "kind": "electrical",
          "unit": "%",
          "min": 47,
          "typ": 48,
          "max": 50,
          "conditions": "Maximum (UC284XB, UC384XB)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum Duty Cycle",
          "symbol": "DC(min)",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0,
          "conditions": "Minimum",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Current, Startup",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 0.5,
          "conditions": "VCC = 6.5 V for UCX845B; VCC = 14 V for UCX844B, BV",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Current, Operating",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 12,
          "max": 17,
          "conditions": "Note 11",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Zener Voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": 30,
          "typ": 36,
          "max": null,
          "conditions": "ICC = 25 mA",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "uc2844bng"
  ],
  "discovery_pitch": "UC2844BNG (onsemi) 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",
    "uc2844bng.kicad_sym",
    "uc2844bng.kicad_mod",
    "uc2844bng.glb",
    "uc2844bng.step",
    "uc2844bng.lbr",
    "docs/hero.png",
    "docs/uc2844bng-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2844bng-hero.glb",
    "uc2844bng-hero.overlay.json",
    "uc2844bng-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}