TPS62224

TPS62220, TPS62221, TPS62222 TPS62223, TPS62224, TPS62225 TPS62227, TPS62228, TPS62229 www.ti.com....................................................................................................................................... SLVS491E – SEPTEMBER 2003 – REVISED FEBRUARY 2009 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 FEATURES 1 2 High-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency 2.5-V to 6-V Input Voltage Range Adjustable Output Voltage Range From 0.7 V to VI Fixed Output Voltage Options Available Up to 400-mA Output Current 1.25-MHz Fixed Frequency PWM Operation Highest Efficiency Over Wide Load Current Range Due to Power-Save Mode 15 µA Typical Quiescent Current Soft Start 100% Duty Cycle Low-Dropout Operation Dynamic Output-Voltage Positioning Available in TSOT23 Package APPLICATIONS PDAs and Pocket PC Cellular Phones, Smart Phones OMAP™ and Low Power DSP Supply Digital Cameras Portable Media Players Portable Equipment WLAN PC Cards DESCRIPTION The 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 PDA...