36V 4A Synchronous Step-down Converter

for 5V-2.4A

SCH-PCB

QC3.0(5V,9V,12V)

GENERAL DESCRIPTION
The AXXXXX is a high-efficiency, high-voltage, synchronous step-down DC-DCconverter with integrated high-side and low-side power MOSFETs.The AXXXXX usesproprietary constant on-time (COT) control to provide excellent line and loadtransientresponse.The AXXXXX featuresslew rate control and spread spectrum frequency modulationto minimize EMI/EMC emissions. With wide input range from 4V to36V,the converter candeliver output voltage ranging from 0.8V to VINwithup to 4A continuous output current.Theconverter can be configured as single output with independent constant current (CC)regulation for each output. In the event of output overload or shortcircuit. Other protectionfeatures include cycle-by-cycle current limit, input under and over voltage protection andthermal shutdown.AXXXXX alsoprovidesprogrammablecablevoltage drop compensation byselecting app ropriate external resistor divider. Switching frequency is internally set to 180kHz. The AXXXXX is available in SOP8-EP package.

FEATURES
-Wide input Voltage Range from 4V to 36V (42VSurge)
-100% Duty Cycle Low DropoutOperation
-70ns Minimum OnTime
-Low EMI and SwitchingNoise
-180kHz Switching Frequency with Spread Spectrum Modulation
-4AContinuous OutputCurrent
-Integrated 40mΩ High-side Switch and 40mΩ Low-side Switch
-Outputs with Independent 5% Accurate Constant Current Regulation
-Programmable Output Cable DropCompensation
-Internal 3ms Soft Start
-Short Circuit Protectionwith Hiccup mode
-ISat60mv
-Thermal Shutdown with AutoRecovery
-Cycle-by-Cycle currentlimit
-Available in SOP8-EPpackage
-RoHS and Halogen freecompliance

APPLICATION
-Automotive and IndustrialSupplies
-Point ofLoad