TPS6305x Single Inductor Buck-Boost Converters

Texas Instruments TPS6305x Single Inductor Buck-Boost Converters are high efficiency, low quiescent current buck-boost converters. They are suitable for applications where the input voltage is higher or lower than the output. The continuous output current can go as high as 500mA in boost mode and as high as 1A in buck mode. The maximum average current in the switches is limited to a typical value of 1A. The TPS6305x devices from Texas Instruments regulate the output voltage over the complete input voltage range by automatically switching between buck or boost mode depending on the input voltage. This ensures a seamless transition between modes. The buck-boost converter is based on a fixed-frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain the highest efficiency. At low load currents, the converter enters Power Save Mode to maintain high efficiency over the complete load current range.