Buck-Boost Converter Helps Extend Battery Life

Texas Instruments has introduced the TPS63020, a small high-performance buck-boost converter with a 4A switch and up to 96 per cent efficiency. The TPS63020 power management integrated circuit (IC) helps extend battery life in smart phones, portable medical equipment, DLP pico projectors and other battery-powered multimedia devices. The buck-boost device operates with a wide input voltage range of 1.8-5.5V and can discharge lithium batteries down to 2.5V or lower, while maintaining good light-load efficiency.

The single-inductor, 2.5MHz TPS63020 converter comes in a 3 x 4 x 1mm package, and can achieve a complete DC/DC converter solution of 100mm2. High output current capability allows a battery-powered device to generate the most current with the greatest amount of efficiency, for example, 3A at 3.3V in step-down mode and more than 2.0A at 3.3V in boost mode at typical conditions. The dynamic input current limit effectively protects the circuit and system.

Power-save mode maintains high efficiency at light load, according to Texas Instruments. The TPS63020 supports one-cell lithium-based or two- or three-cell alkaline, NiCd or NiMH batteries.

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