component

MC34063ADG

Public Made by Adom

by adom

onsemi DC-DC Converters, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MC34063ADG

onsemi · DC-DC Converters · SOIC-8

MC34063ADG from onsemi, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Switch Collector output Collector of the internal output switch, rated 40 V with switch current up to 1.5 A.
2 Switch Emitter output Emitter of the internal output switch, rated 40 V (VPin 1 = 40 V).
3 Timing Capacitor passive Timing capacitor connection that sets the oscillator frequency and duty cycle, with CT = 1.0 nF used in the stated test conditions.
4 GND power_in Ground reference for the device.
5 Inverting Input input Inverting input of the internal comparator, compared against the 1.25 V reference, with comparator input voltage range of -0.3 V to +40 V.
6 VCC power_in Supply voltage input, with power supply voltage rated 40 V maximum and operation from 3.0 V.
7 Ipk Sense input Current limit sense input, with current limit sense voltage of 250 mV to 350 mV (300 mV typical).
8 Driver Collector output Collector of the internal driver transistor, rated 40 V with driver collector current up to 100 mA.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-8
Category Power Management ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Frequency fosc 24 33 42 kHz VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C 3
Charge Current Ichg 24 35 42 A VCC = 5.0 V to 40 V, TA = 25°C 3
Discharge Current Idischg 140 220 260 A VCC = 5.0 V to 40 V, TA = 25°C 3
Discharge to Charge Current Ratio Idischg/Ichg 5.2 6.5 7.5 − Pin 7 to VCC, TA = 25°C 3
Current Limit Sense Voltage Vipk(sense) 250 300 350 mV Ichg = Idischg, TA = 25°C 3
Saturation Voltage, Darlington Connection VCE(sat) 1 1.3 V ISW = 1.0 A, Pins 1, 8 connected 3
Saturation Voltage (non-Darlington) VCE(sat) 0.45 0.7 V ISW = 1.0 A, RPin 8 = 82 Ω to VCC, Forced β = 20 3
DC Current Gain hFE 50 75 − ISW = 1.0 A, VCE = 5.0 V, TA = 25°C 3
Collector Off-State Current IC(off) 0.01 100 A VCE = 40 V 3
Threshold Voltage Vth 1.225 1.25 1.275 V TA = 25°C 3
Threshold Voltage over temperature Vth 1.21 1.29 V TA = Tlow to Thigh 3
Threshold Voltage Line Regulation Regline 1.4 5 mV VCC = 3.0 V to 40 V 3
Input Bias Current IIB -20 -400 nA Vin = 0 V 3
Supply Current ICC 4 mA VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC, VPin 5 > Vth, Pin 2 = GND, remaining pins open 3
Power Supply Voltage VCC 40 Vdc 2
Comparator Input Voltage Range VIR -0.3 40 Vdc 2
Switch Collector Voltage VC(switch) 40 Vdc 2
Switch Emitter Voltage VE(switch) 40 Vdc VPin 1 = 40 V 2
Switch Collector to Emitter Voltage VCE(switch) 40 Vdc 2
Driver Collector Voltage VC(driver) 40 Vdc 2
Driver Collector Current IC(driver) 100 mA 2
Switch Current ISW 1.5 A 2
Power Dissipation, SOIC package PD 625 mW TA = 25°C 2
Thermal Resistance Junction-to-Ambient, SOIC package RθJA 160 °C/W 2
Thermal Resistance Junction-to-Case, SOIC package RθJC 45 °C/W 2
Operating Junction Temperature TJ 150 °C 2
Operating Ambient Temperature Range TA 0 70 °C MC34063A, SC34063A 2
Storage Temperature Range Tstg -65 150 °C 2

CAD (KiCad official)

  • Symbol: MC34063ADG
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: mc34063adg-etched.step / mc34063adg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc34063adg.step / mc34063adg.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (17 pp, sha256 ebc110d24bfb7a44, retrieved 2026-10-26, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF