DC to DC Converter Controller
ET-34063A
DC to DC Converter Control Circuits
DESCRIPTION
The MC34063A Series is a monolithic control circuit containing...
Description
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...
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