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Ray Set visibility: public 9f114f2 5d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "uc2842bd1",
  "title": "UC2842BD1",
  "brief": "STMicroelectronics DC-DC Controllers, SO-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",
    "uc2842bd1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC2842BD1",
    "manufacturer": "STMicroelectronics",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Controllers",
    "datasheet": "https://www.st.com/resource/en/datasheet/uc2842bd1.pdf",
    "parts": {
      "symbol": "uc2842bd1.kicad_sym",
      "footprint": "uc2842bd1.kicad_mod",
      "model_3d": "uc2842bd1-hero.glb",
      "model_3d_plain": "uc2842bd1-etched.glb",
      "model_3d_step": "uc2842bd1-etched.step",
      "model_3d_step_plain": "uc2842bd1.step",
      "lbr": "uc2842bd1.lbr"
    },
    "distributor_links": {
      "lcsc": "C1529980",
      "digikey": "497-18659-ND",
      "mouser": "511-UC2842BD"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T16:57:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-18659-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-UC2842BD",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "This pin is the Error Amplifier output and is made available for loop compensation."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "This is the inverting input of the Error Amplifier, normally connected to the switching power supply output through a resistor divider."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "A voltage proportional to inductor current is connected to this input, and the PWM uses this information to terminate the output switch conduction."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to Vref and capacitor CT to ground, and operation to 500kHz is possible."
      },
      {
        "number": "5",
        "name": "GROUND",
        "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, and peak currents up to 1A are sourced and sunk by this pin."
      },
      {
        "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 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-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "1/8 pins cited to the wrong page (name found elsewhere): ['5:GROUND@p2']"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0143,
        "at": "2026-11-02T16:57:00"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/uc2842bd1.pdf",
        "pages": 15,
        "sha256": "fedfd7362400f8b3",
        "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": "uc2842bd1.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.9,
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2842bd1-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9a37edf72684234ea2d231180f66f6d8af7b5c7d0c4c8807788dbfa6ea1b72ba",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-8",
      "Category": "Power Management ICs",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "fedfd7362400f8b32aab63349708c772b15a0999a8abc2ee0ec046c1f42cdae9",
      "rows": [
        {
          "name": "Supply Voltage (low impedance source)",
          "symbol": "Vi",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Energy (capacitive load)",
          "symbol": "EO",
          "kind": "absolute_maximum",
          "unit": "µJ",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "capacitive load",
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        },
        {
          "name": "Analog Inputs (pins 2, 3)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Error Amplifier Output Sink Current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation (SO8)",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "Tamb ≤ 25 °C",
          "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": "Junction Operating Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "soldering 10s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-ambient (SO8)",
          "symbol": "Rth j-amb",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (VREF)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.95,
          "typ": 5,
          "max": 5.05,
          "conditions": "Tj = 25°C, Io = 1mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Total Output Variation",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.9,
          "typ": null,
          "max": 5.1,
          "conditions": "Line, Load, Temperature",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "∆VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 20,
          "conditions": "12V ≤ Vi ≤ 25V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "∆VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 25,
          "conditions": "1 ≤ Io ≤ 20mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Temperature Stability",
          "symbol": "∆VREF/∆T",
          "kind": "temperature_coefficient",
          "unit": "mV/°C",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "Note 2",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Short Circuit",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": -30,
          "typ": -100,
          "max": -180,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Frequency Change with Voltage",
          "symbol": "∆fOSC/∆V",
          "kind": "voltage_coefficient",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "VCC = 12V to 25V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Frequency Change with Temperature",
          "symbol": "∆fOSC/∆T",
          "kind": "temperature_coefficient",
          "unit": "%",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "TA = Tlow to Thigh",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Oscillator Voltage Swing (peak to peak)",
          "symbol": "VOSC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.6,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Input Voltage",
          "symbol": "V2",
          "kind": "electrical",
          "unit": "V",
          "min": 2.45,
          "typ": 2.5,
          "max": 2.55,
          "conditions": "VPIN1 = 2.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current (error amp)",
          "symbol": "Ib",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": -0.1,
          "max": -1,
          "conditions": "VFB = 5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Open Loop Gain",
          "symbol": "AVOL",
          "kind": "electrical",
          "unit": "dB",
          "min": 65,
          "typ": 90,
          "max": null,
          "conditions": "2V ≤ Vo ≤ 4V",
          "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",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 70,
          "max": null,
          "conditions": "12V ≤ Vi ≤ 25V",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Output Sink Current",
          "symbol": "Io",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": 12,
          "max": null,
          "conditions": "VPIN2 = 2.7V, VPIN1 = 1.1V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Source Current",
          "symbol": "Io",
          "kind": "electrical",
          "unit": "mA",
          "min": -0.5,
          "typ": -1,
          "max": null,
          "conditions": "VPIN2 = 2.3V, VPIN1 = 5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VOUT High",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": 6.2,
          "max": null,
          "conditions": "VPIN2 = 2.3V; RL = 15KΩ to Ground",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VOUT Low",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": 1.1,
          "max": null,
          "conditions": "VPIN2 = 2.7V; RL = 15KΩ to Pin 8",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Gain",
          "symbol": "GV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 2.85,
          "typ": 3,
          "max": 3.15,
          "conditions": "note 3 & 4",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Input Signal",
          "symbol": "V3",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "VPIN1 = 5V (note 3)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage Rejection",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
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          "max": null,
          "conditions": "12 ≤ Vi ≤ 25V (note 3)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current (current sense)",
          "symbol": "Ib",
          "kind": "electrical",
          "unit": "µA",
          "min": -2,
          "typ": -10,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Delay to Output",
          "symbol": "",
          "kind": "timing",
          "unit": "ns",
          "min": 150,
          "typ": 300,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Low Level",
          "symbol": "VOL",
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          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 0.4,
          "conditions": "ISINK = 20mA",
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        },
        {
          "name": "Output Low Level",
          "symbol": "VOL",
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          "min": null,
          "typ": 1.6,
          "max": 2.2,
          "conditions": "ISINK = 200mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output High Level",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 13,
          "typ": 13.5,
          "max": null,
          "conditions": "ISOURCE = 20mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output High Level",
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          "kind": "electrical",
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          "min": 12,
          "typ": 13.5,
          "max": null,
          "conditions": "ISOURCE = 200mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "UVLO Saturation",
          "symbol": "VOLS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 1.1,
          "conditions": "VCC = 6V; ISINK = 1mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Rise Time",
          "symbol": "tr",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "Tj = 25°C, CL = 1nF",
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          "source": "datasheet"
        },
        {
          "name": "Fall Time",
          "symbol": "tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "Tj = 25°C, CL = 1nF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Start Threshold (X842B/4B)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 15,
          "typ": 16,
          "max": 17,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Min Operating Voltage After Turn-on (X842B/4B)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Duty Cycle (X842B/3B)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 94,
          "typ": 96,
          "max": 100,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Start-up Current (UCX842B/44B)",
          "symbol": "Ist",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 0.5,
          "conditions": "Vi = 14V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Supply Current",
          "symbol": "Ii",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 12,
          "max": 17,
          "conditions": "VPIN2 = VPIN3 = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Zener Voltage",
          "symbol": "Viz",
          "kind": "electrical",
          "unit": "V",
          "min": 30,
          "typ": 36,
          "max": null,
          "conditions": "Ii = 25mA",
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