Switching buck-boost converter with up to 96% efficiency

Today's portable product power supply designs are becoming increasingly complex, requiring higher power, more power rails, and smaller board space. In response to the above trends, Texas Instruments (TI) has recently launched the industry's smallest and highest performance 4A switch buck-boost converter TPS63020, which achieves up to 96% peak efficiency and high efficiency at light loads.

The input operating voltage of this buck-boost converter is between 1.8V and 5.5V, and the output operating voltage is between 1.2V and 5.5V. It can discharge lithium-ion batteries to 2.5V or lower while maintaining excellent light-load efficiency. The single-inductor 2.4MHz TPS63020 converter uses a 3mm×4mm×1mm package to achieve a complete DC/DC converter solution of less than 100mm2, saving 60% of board space compared to similar competing products. Its typical quiescent current is 30uA. With dynamic input current control and power-saving mode, the intelligent power status good indication improves system reliability. In addition, the device requires fewer external components and is very easy to design.

4A switch buck-boost converter TPS63020.

Wu Tao, business development engineer of power products in TI China, pointed out that the TPS63020 buck-boost converter adopts TI's advanced LBC7 BiCMOS process and is suitable for battery-powered applications that require 3.3V voltage, such as smart phones, portable medical equipment, DLP micro projectors, etc., which can effectively extend the battery life. It can achieve high efficiency in the entire load range, and the efficiency can reach 90% at light load.

The main features and advantages of TPS63020 also include: high output current performance enables battery-powered devices to generate maximum current with the highest efficiency. For example, in typical cases, it can generate 3.3V voltage and 3A current in buck mode, and 3.3V voltage and more than 2.0A current in boost mode; dynamic input current limit can effectively protect circuits and systems; power saving mode can maintain high efficiency under light load; support single lithium-ion battery, 2-cell, 3-cell alkaline battery, NiCd or NiMH battery.