TPS62204 Datasheet | Texas Instruments

Features - 1 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 300-m A Output Current - 1-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 a 5-Pin SOT23 Package 2 Applications - PDAs and Pocket PCs - Cellular Phones and Smart Phones - Low Power DSP Supplies - Digital Cameras - Portable Media Players - Portable Equipment Typical Application Schematic VI 2.5 V - 6 V C1 4.7 m F TPS62202 L1 1 VI 5 10 m H SW 2 GND 3 EN 4 FB VO 1.8 V / 300 m A C2 10 m F (Fixed Output Voltage Version) 3 Description The TPS6220x 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 Ni MH/Ni Cd 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 300 m A output current, the devices are ideal to power low voltage DSPs 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 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, it achieves the highest efficiency over the entire load current range. The TPS6220x needs only three small external ponents. Together with the SOT23 package, a minimum system solution size is achieved. An advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors. Device...