ET-34063A

ET-34063A DC to DC Converter Control Circuits DESCRIPTION The MC34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components. FEATURES Operation from 3.0 V to 40 V Input Low Standby Current Current Limiting Output Switch Current to 1.5 A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference ABSOLUTE MAXIMUM RATINGS Rating Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VPIN 1=40V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collect Current (Note 1) Switch Current Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW TJ TA Tstg Value 40 -0.3 to +40 40 40 40 40 100 1.5 +150 0 to +70 -65 to +150 Unit Vdc Vdc Vdc Vdc Vdc Vdc mA A ET- 34063A ELECTRICAL CHARACTERISTICS (Vcc=5.0 V, Ta=Tlow to Thigh, unless otherwise specified.) Characteristics Symbol Min OSCILLATOR Frequency fOSC 24 (Vpin5=0V, CT=1.0nF, TA=25 ) Charge Current (VCC=5.0V to 40V, TA=25 ) lch...