MC34063ABN

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  "type": "component",
  "slug": "mc34063abn",
  "title": "MC34063ABN",
  "brief": "STMicroelectronics DC-DC Converters, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "MC34063ABN",
    "manufacturer": "STMicroelectronics",
    "package": "DIP-8",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.st.com/resource/en/datasheet/mc34063abn.pdf",
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    "distributor_links": {
      "lcsc": "C1355472"
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      "checked_at": "2026-10-22T22:47:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 879 calls left today"
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    "pins": [
      {
        "number": "1",
        "name": "SWC",
        "type": "passive",
        "description": "Switch collector of the internal output switch transistor; collector voltage limited to 40 V and switch current to 1.5 A."
      },
      {
        "number": "2",
        "name": "SWE",
        "type": "passive",
        "description": "Switch emitter of the internal output switch transistor; emitter voltage limited to 40 V (VSWC = 40 V)."
      },
      {
        "number": "3",
        "name": "TC",
        "type": "passive",
        "description": "Timing capacitor pin that sets the oscillator frequency (e.g. 24 to 42 kHz with CT = 1 nF)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the device."
      },
      {
        "number": "5",
        "name": "CII",
        "type": "input",
        "description": "Comparator inverting input compared against the 1.25 V threshold (input range -0.3 to 40 V)."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_in",
        "description": "Voltage supply pin, operating from 3 V to 40 V with an absolute maximum of 50 V."
      },
      {
        "number": "7",
        "name": "IPK",
        "type": "input",
        "description": "Peak current sense input with a current limit sense voltage of 250 to 350 mV (300 mV typ.)."
      },
      {
        "number": "8",
        "name": "DRC",
        "type": "passive",
        "description": "Driver collector of the voltage driver stage; voltage limited to 40 V and current to 100 mA."
      }
    ],
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  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "DIP-8",
      "Category": "Power Management ICs",
      "Pins": "8"
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    "characteristics": {
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          "name": "Oscillator frequency",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 24,
          "typ": 33,
          "max": 42,
          "conditions": "VPIN5 = 0V, CT = 1 nF, TA = 25°C",
          "source_page": 6,
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        {
          "name": "Charge current",
          "symbol": "ICHG",
          "kind": "electrical",
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          "min": 24,
          "typ": 33,
          "max": 42,
          "conditions": "VCC = 5 to 40V, TA = 25°C",
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          "max": 260,
          "conditions": "VCC = 5 to 40V, TA = 25°C",
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          "kind": "electrical",
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          "min": 5.2,
          "typ": 6.2,
          "max": 7.5,
          "conditions": "PIN 7 = VCC, TA = 25°C",
          "source_page": 6,
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        },
        {
          "name": "Current limit sense voltage",
          "symbol": "VIPK(sense)",
          "kind": "electrical",
          "unit": "mV",
          "min": 250,
          "typ": 300,
          "max": 350,
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        {
          "name": "Saturation voltage, Darlington connection",
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          "typ": 1,
          "max": 1.3,
          "conditions": "ISW = 1 A, PIN 1, 8 connected",
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        {
          "name": "Saturation voltage",
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          "max": 0.7,
          "conditions": "ISW = 1 A, RPIN8 = 82 Ω to VCC, Forced β ~ 20",
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        {
          "name": "DC current gain",
          "symbol": "hFE",
          "kind": "electrical",
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          "min": 50,
          "typ": 120,
          "max": null,
          "conditions": "ISW = 1 A, VCE = 5 V, TA = 25°C",
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        {
          "name": "Collector off-state current",
          "symbol": "IC(off)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.01,
          "max": 100,
          "conditions": "VCE = 40 V",
          "source_page": 6,
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        {
          "name": "Threshold voltage",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.225,
          "typ": 1.25,
          "max": 1.275,
          "conditions": "TA = 25°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Threshold voltage over temperature",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.21,
          "typ": null,
          "max": 1.29,
          "conditions": "TA = TLOW to THIGH",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Threshold voltage line regulation",
          "symbol": "Regline",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1,
          "max": 10,
          "conditions": "VCC = 3 to 40 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input bias current",
          "symbol": "IIB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": -5,
          "max": -400,
          "conditions": "VIN = 0 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.5,
          "max": 4,
          "conditions": "VCC = 5 to 40 V, CT = 1 nF, PIN 7 = VCC, VPIN5 > VTH, PIN 2 = GND, remaining pins open, for MC34063A",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Start-up voltage",
          "symbol": "VSTART-UP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.1,
          "max": null,
          "conditions": "TA = 25°C, CT = 1 µF, PIN 5 = 0, for MC34063A",
          "source_page": 7,
          "source": "datasheet"
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        {
          "name": "Power supply voltage",
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          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
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          "name": "Comparator input voltage range",
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          "min": -0.3,
          "typ": null,
          "max": 40,
          "conditions": "",
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        {
          "name": "Switch collector voltage",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
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        {
          "name": "Switch emitter voltage",
          "symbol": "VSWE",
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          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "VSWC = 40V",
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          "name": "Switch collector to emitter voltage",
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          "typ": null,
          "max": 40,
          "conditions": "",
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          "name": "Driver collector voltage",
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          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
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        {
          "name": "Driver collector current",
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          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
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        {
          "name": "Switch current",
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          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "",
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        {
          "name": "Power dissipation",
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          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.25,
          "conditions": "TA = 25°C, for DIP-8",
          "source_page": 5,
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        {
          "name": "Operating junction temperature",
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          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        {
          "name": "Storage temperature range",
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          "unit": "°C",
          "min": -40,
          "typ": null,
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          "conditions": "",
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        {
          "name": "Operating ambient temperature range",
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          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "for AB series",
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        {
          "name": "Thermal resistance junction-ambient",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "DIP-8; depends on PCB thermal design",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Thermal resistance junction-case",
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          "kind": "thermal",
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          "min": null,
          "typ": 42,
          "max": null,
          "conditions": "DIP-8",
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