MC34063ACS General Description
The MC34063A by Analog Integrations Corporation, an improved second source over the industrial standard MC34063A, is 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.
MC34063ACS Maximum Ratings
Supply Voltage ............................................................................ 30V
Comparator Input Voltage Range .................................... -0.3V~30V
Switch Collector Voltage ...............................................................30V
Switch Emitter Voltage ..................................................................30V
Switch Collector to Emitter Voltage ...............................................30V
Driver Collector Voltage ................................................................30V
Switch Current .............................................................................1.6A
Power Dissipation and Thermal Characteristics
DIP Package
Ta= 25°C .....................................................................................1.0W
Thermal Resistance ..............................................................100°C /W
SO Package
Ta= 25°C...................................................................................625mW
Thermal Resistance ...............................................................160°C /W
Operating Junction Temperature ...............................................125°C
Operating Ambient Temperature Range .............................0°C~70°C
Storage Temperature Range...................................... - 65°C~150°C
MC34063ACS Features
" 3V to 30V Input Voltage Operation.
" Internal 1.6A Peak Current Switch.
" Internal ±1.8% Reference.
" Low Quiescent Current at 1.6mA.
" Frequency Operation from 100Hz to 100KHz.
" Current Limiting.
MC34063ACS Typical Application
" Saver for Cellular phones
" DC-DC Converter Module
MC34063ACS Connection Diagram
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