MC34063 product image


Switching Regulators
ONSEMI [ON Semiconductor]
FAIRCHILD [Fairchild Semiconductor]
AIC [Analog Intergrations Corporation]
FCI [First Components International]
KEXIN [Guangdong Kexin Industrial Co.,Ltd]

TheMC34063is a monolithic control circuit containing the primary functions required for DC/DC converters. The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This device is specifically designed to be incorporated in stepdown, step-up and voltage-inverting applications with a minimum number of external components. The ±1.8% internal reference and low quiescent current of 1.6mA are among the improvements of the device over the competition.


MC34063 Features


  • •Low Standby Current
  • •Current Limiting
  • •Output Switch Current to 1.2 A
  • •Output Voltage Adjustable
  • •Frequency Operation to 100 kHz
  • •Precision 2% Reference


MC34063 Applicatins


  • •Saver for Cellular phones
  • •DC-DC Converter Module


Power Supply Voltage VCC40V
Comparator Input Voltage Range VIR-0.3 to +40V
Switch Collector Voltage VC(switch)40V
Switch Emitter Voltage (VPin 1 = 40 V) VE(switch)40V
Switch Collector to Emitter Voltage VCE(switch)40V
Driver Collector Voltage VC(driver)40V
Driver Collector Current IC(driver)100mA
Switch Current ISW1.2A
Power Dissipation and Thermal Characteristics TA = 25 PD625mW
Thermal Resistance RèJA160°C/W
MC34063 Replacement Parts
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