RY9050 5.5V 5A 1MHz 低功耗同步降压稳压器 DFN3X3-10 深圳恒锐丰科技.pdf
RY9050
5.5V5A1MHzECOTSyncStep-DownRegulator
Features
•HighEfficiency:Upto96%•OvertemperatureProtected
•2.5Vto5.5VInputVoltageRange•LowQuiescentCurrent:40μA
•1MHzConstantFrequencyOperation•ShortCircuitProtection
•Upto5.0ACurrentOutput•InrushCurrentLimitandSoftStart
•NoSchottkyDiodeRequired•DFN3×3-10package
Applications
•CellularandSmartPhones•PortableInstruments
•WirelessandDSLModems•SSD
•PDAs•PCCards
GeneralDescription
TheRY9050isahigh-efficiencyECOTModesynchronousbuckregulatorusingaconstantfrequency.Thedevice
isavailableinanadjustableversion.Supplycurrentwithnoloadis40uAanddropsto1uAinshutdown.The2.5V
to5.5VinputvoltagerangemakestheRY9050ideallysuitedforsingleLi-Ionbatterypoweredapplications.High
dutycycleprovideslowdropoutoperation,extendingbatterylifeinportablesystems.PWM/PFMmodeoperation
providesverylowoutputripplevoltagefornoisesensitiveapplications.Switchingfrequencyisinternallysetat
1MHz,allowingtheuseofsmallsurfacemountinductorsandcapacitors.Lowoutputvoltagesareeasilysupported
withthe0.6Vfeedbackreferencevoltage.
TheRY9050isofferedinalowprofile10-pin,thinDFN3×3-10package,andisavailableinanadjustableversion.
TypicalApplicationCircuit
VIN=5VL10.47uH