TPS62026

www.ti.com TPS62020 TPS62021 TPS62026 SLVS076C – JUNE 2003 – REVISED DECEMBER 2004 600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER FEATURES Up to 95% Conversion Efficiency Typical Quiescent Current: 18 µA Load Current: 600 mA Operating Input Voltage Range: 2.5 V to 6.0 V Switching Frequency: 1.25 MHz Adjustable and Fixed Output Voltage Power Save Mode Operation at Light load Currents Active-Low MODE pin on TPS62021 100% Duty Cycle for Lowest Dropout Internal Softstart Dynamic Output Voltage Positioning Thermal Shutdown Short-Circuit Protection 10 Pin MSOP PowerPad™ Package 10 Pin QFN 3 X 3 mm Package DESCRIPTION The TPS6202x is a high efficiency synchronous step-down dc-dc converter optimized for battery powered portable applications. This device is ideal for portable applications powered by a single Li-Ion battery cell or by 3-cell NiMH/NiCd batteries. With an output voltage range from 6.0 V down to 0.7 V, the device supports low voltage DSPs and processors in PDAs, pocket PCs, as well as notebooks and subnotebook computers. The TPS6202x operates at a fixed switching frequency of 1.25 MHz and enters the power save mode operation at light load currents to maintain high efficiency over the entire load current range. For low noise applications, the device can be forced into fixed frequency PWM mode by pulling the MODE pin high. The difference between the TPS6202x and the TPS62021 is the logic level of the MODE pin. The TPS62021 has an activ...