MC34063ADR2G

{
  "slug": "mc34063adr2g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi DC-DC Converters, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
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    "power management (pmic)",
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  "component": {
    "mpn": "MC34063ADR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc34063a-d.pdf",
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    "distributor_links": {
      "lcsc": "C32078"
    },
    "pins": [
      {
        "number": "1",
        "name": "Switch Collector",
        "type": "output",
        "description": "Collector of the internal NPN output switch transistor Q1; maximum VCE 40 V; saturation voltage ≤1.3 V (Darlington, ISW=1.0 A) or ≤0.7 V (forced β=20, ISW=1.0 A); maximum switch current 1.5 A; connected to Pin 8 for Darlington configuration."
      },
      {
        "number": "2",
        "name": "Switch Emitter",
        "type": "output",
        "description": "Emitter of the internal output switch transistor Q1; maximum switch current 1.5 A; the external sense resistor Rsc (= 0.3/Ipk) is placed between this pin and ground to set the peak current limit."
      },
      {
        "number": "3",
        "name": "Timing Capacitor",
        "type": "passive",
        "description": "External oscillator timing capacitor CT connection; CT = 1.0 nF yields approximately 33 kHz free-running frequency; CT is calculated as 4.0×10⁻⁵ × ton for converter design."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the entire device; all internal signals and the 1.25 V reference are referenced to this pin."
      },
      {
        "number": "5",
        "name": "Comparator Inverting Input",
        "type": "input",
        "description": "Inverting input of the feedback comparator; threshold voltage 1.25 V typical (1.21 V min, 1.29 V max over full temperature range); an external resistor divider from the regulated output to this pin sets the output voltage via Vout = 1.25×(1 + R2/R1); input bias current −400 nA maximum."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply voltage input; operating range 3.0 V to 40 V; maximum supply current 4.0 mA (VCC = 5.0 V to 40 V, CT = 1.0 nF); threshold voltage line regulation 5.0 mV maximum (MC34063A) over 3.0 V to 40 V range."
      },
      {
        "number": "7",
        "name": "Ipk Sense",
        "type": "input",
        "description": "Peak switch current limit sense input; the oscillator is forced to immediately discharge CT (ending the ON time) when the voltage at this pin reaches 300 mV typical (250 mV min, 350 mV max); the external sense resistor Rsc = 0.3/Ipk(switch) is placed between this pin and the switch current path."
      },
      {
        "number": "8",
        "name": "Driver Collector",
        "type": "output",
        "description": "Collector of the internal driver transistor Q2; maximum driver collector current 100 mA, maximum collector voltage 40 V; connected to Pin 1 (Switch Collector) for the Darlington output switch configuration, or used to drive the base of an external NPN/PNP transistor for output currents exceeding 1.5 A."
      }
    ],
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
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        "cost_usd": 0.5541,
        "at": "2026-09-21T20:51:00"
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        "pages": 17,
        "sha256": "f7babf6a0b5180ec",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
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        "refuses_to_fabricate": true
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}