DescriptionThe AZ34063U is a monolithic switching regulatorcontrol circuit which contains the primary functionsrequired for DC-DC converters. This device consistsof internal temperature compensated reference, voltagecomparator, controlled duty cycle oscillator with activecurrent limit circuit, driver and high current outputswitch. The AZ34063U is specifically designed as a generalDC-DC converter to be used in Step-Down, Step-Upand Voltage-Inverting applications with a minimumnumber of external components.The AZ34063U is available in 2 packages: SOIC-8 andDIP-8.Features Operation from 3.0V to 36V Input Low Standby Current Current Limiting Output Switch Current to 1.5A Output Voltage Adjustable Operation Frequency up to 180kHz Precision 2% Reference ApplicationsBattery ChargersADSL ModemsHubs Negative Voltage Power Supplies Figure 1. Package Types of AZ34063USOIC-8DIP-81.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U Preliminary Datasheet 2 Jun. 2009 Rev. 1. 1 BCD Semiconductor Features Operation from 3.0V to 36V Input Low Standby Current Current Limiting Output Switch Current to 1.5A Output Voltage Adjustable Operation Frequency up to 180kHz Precision 2% Reference ApplicationsBattery ChargersADSL ModemsHubs Negative Voltage Power Supplies Figure 1. Package Types of AZ34063USOIC-8DIP-81.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U Preliminary Datasheet 2 Jun. 2009 Rev. 1. 1 BCD Semiconductor Manufacturing LimitedFigure 2. Pin Configuration of AZ34063U (Top View)M Package (DIP-8) Pin ConfigurationFunctional Block DiagramFigure 3. Functional Block Diagram of AZ34063USwitchTiming SwitchGNDIPK SenseVCCComparator Inverting InputCollectorCapacitor EmitterDriver CollectorSwitchCollectorSwitch Emitter Timing CapacitorGND DriverCollectorIPK SenseVCCComparator Inverting Input114325687(SOIC-8)P PackageSwitchTiming SwitchGNDIPK SenseVCCComparator Inverting InputCollectorCapacitor EmitterDriver Collector1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U Datasheet 1 Jun. 2009 Rev. 1. 1 BCD Semiconduc