Low-power Step-down DC/DC Converters Provide 1.5% Regulation

( 1 Nov 2007 )

Texas Instruments Inc. announces its smallest 2.25 MHz high-performance, step-down DC/DC converters, which support low-power DSPs and microcontroller-based portable electronics. Extending battery life in Bluetooth headsets, cell phones and other Li-ion battery-powered applications, the converters save valuable board space.

TI's 300mA, 600mA and 1A synchronous, step-down DC/DC converters can efficiently regulate output voltages down to 0.6V with ¡À1.5% accuracy, enabling the devices to power the company's newest C5000 and DaVinci DSPs, low-power MSP430 microcontrollers and other controllers with ultra-precise processor core supply requirements. The TPS62290 provides up to 1 A of output current, and can be powered by a single-cell Li-ion, three-cell NiMH and three-cell alkaline batteries with an input voltage range of 2.3V to 6V.

The converter, which operates at 15¦ÌA quiescent current, enters a power save mode during light load operating conditions and maintains efficiency up to 95% over the entire load current range.

Texas Instruments Inc.; www.ti.com