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Single-Inductor DC/DC Converters In Ultra-Small CSP Package

Single-Inductor DC/DC Converters In Ultra-Small CSP Package

Texas Instruments has introduced the industry's smallest and highest performance 1A and 4A buck-boost regulators. Designed to extend battery life in Li-Ion battery-powered designs ranging from portable medical devices to point-of-sale terminals, the 1A TPS63050 and 4A TPS630250 single-inductor devices achieve up to 95 percent efficiency in half the solution size compared to other products on the market.

The TPS630250 converter with 4A switches supports a wide input voltage range of 2.3 V to 5.5 V and can discharge lithium batteries down to 2.5 V or lower, while maintaining excellent light load efficiency and a quiescent current of 35 µA. The 2.5-MHz device can achieve a complete DC/DC buck-boost solution of 33mm2 -- less than half the size achieved with existing 4A products.


  • Highest efficiency: Achieves up to 95 percent power efficiency and a high-output current capability to generate the most current with the greatest amount of efficiency. For example, it can achieve 3 A at 3.3 V out in step-down mode and more than 2 A at 3.3 V out in boost mode.
  • Light-load power savings: Power Save Mode maintains high efficiency over the complete load current range. And the new buck-boost converter delivers the industry's lowest quiescent current of 35uA.
  • Smallest, thinnest solution size: 2.5-MHz converter in a 1.766-mm by 2.086-mm by 0.5-mm CSP package achieves a solution size of 33 mm2.

The TPS63050 and TPS630250 converters and the bq24192 charger are available now in volume production through TI and its worldwide network of authorized distributors. The TPS63050 comes in a small 1.726 mm by 1.326 mm, 12-pin CSP package at a suggested resale price of US$0.91 in 1,000-unit quantities. The TPS630250 comes in a 20-pin CSP package measuring 1.766 mm by 2.086 mm for US$1.75 each in 1,000-unit quantities. The bq24192 battery charger IC comes in a 24-pin, 4 mm by 4 mm QFN at US$2.50 each in 1,000-unit quantities.

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