Only ITEM IC Texas Instruments IncorporatedTPS62220DDCT Adjustable 400-mA Step-Down Converter 15uA 5SOT-23 TPS62220Adjustable 400-mA Step-Down Converter 15uA 5SOT-23Datasheet400-mA, 1.25-MHz, High-Efficiency, Step-Down Converter in Thin-SOT23 (Rev. E) (PDF , 801 KB) 05 Feb 2009DescriptionThe TPS6222x devices are a family of high-efficiency, synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitable to operate from a standard 3.3-V or 5-V voltage rail.With an output voltage range of 6 V down to 0.7 V and up to 400-mA output current, the devices are ideal for powering the low voltage TMS320 DSP family and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching frequency of typically 1.25 MHz. At light load currents, the part enters the power-save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore, the device achieves the highest efficiency over the entire load current range. The TPS6222x needs only three small external components. Together with the tiny TSOT23 package, a minimum system solution size can be achieved. An advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors. FeaturesHigh-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency2.5-V to 6-V Input Voltage RangeAdjustable Output Voltage Range From 0.7 V to VIFixed Output Voltage Options AvailableUp to 400-mA Output Current1.25-MHz Fixed Frequency PWM OperationHighest Efficiency Over Wide Load Current Range Due to Power-Save Mode15 µA Typical Quiescent CurrentSoft Start100% Duty Cycle Low-Dropout OperationDynamic Output-Voltage PositioningAvailable in TSOT23 PackageAPPLICATIONSPDAs and Pocket PCCellular Phones, Smart PhonesOMAP™ and Low Power DSP SupplyDigital CamerasPortable Media PlayersPortable EquipmentWLAN PC CardsOMAP, TMS320 are trademarks of Texas Instruments.