RY4054A-35T5

StandaloneLinearLi-IonBatteryCharger

Features

?Constant-Current/Constant-VoltageOperation?AutomaticRecharge

withThermalRegulationtoMaximizeCharge?ChargeStatusOutputPin

RateWithoutRiskofOverheating?C/10ChargeTermination

?NoMOSFET,SenseResistororBlockingDiode?FixedChargeCurrent350mA

Required?Preset4.2VChargeVoltagewith±2%Accuracy

?CompleteLinearChargerinSOTPackagefor?25μASupplyCurrentinShutdown

SingleCellLithium-IonBatteries?2.9VTrickleChargeThreshold

?ChargesSingleCellLi-IonBatteriesDirectlyfrom?Soft-StartLimitsInrushCurrent

USBPort?Availablein5-LeadSOT-23Package

?ChargeCurrentMonitorOutputforGasGauging?RoHSCompliantandLead(Pb)Free

Applications

?CellularTelephones?BluetoothApplication

?ChargingDocksandCradles?WearableApplication

GeneralDescription

TheRY4054A-35T5isacompleteconstant-current/constant-voltagelinearchargerforsinglecelllithium-ion

batteries.ItsSOTpackageandlowexternalcomponentcountmaketheRY4054A-35T5ideallysuitedforportable

applications.Furthermore,theRY4054A-35T5isspecificallydesignedtoworkwithinUSBpowerspecifications.

Noexternalsenseresistorisneeded,andnoblockingdiodeisrequiredduetotheinternalMOSFETarchitecture.

Thermalfeedbackregulatesthechargecurrenttolimitthedietemperatureduringhighpoweroperationorhigh

ambienttemper