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'Smallest' 2.25MHz DC/DCs suit portable apps

Posted: 06 Aug 2007 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC converter? portable applications? MCU?

TI's smallest 2.25MHz DC/DC

Texas Instruments Inc. (TI) has unveiled what it touts as the smallest 2.25MHz high-performance, step-down DC/DC converters, which support low-power DSPs and MCU-based portable electronics.

The 300mA, 600mA and 1A synchronous, step-down DC/DC converters can efficiently regulate output voltages down to 0.6V with 1.5 percent accuracy, enabling the devices to power TI's newest C5000 and DaVinci DSPs, MSP430 MCUs 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 converters, which operates at a low 15?A quiescent current, enters a power save mode during light load operating conditions and maintains efficiency up to 95 percent over the entire load current range. For low-noise applications, the device can be forced into fixed frequency pulse width modulation mode by pulling the MODE pin high. In the shutdown mode, the TPS62290's current consumption is reduced to less than 1?A.

TI also introduced the TPS62260, which supports up to 600mA of output current, and the TPS62240 to support up to 300mA. Both devices contain the same functionality and high-performance as the TPS62290 but can support a slightly wider input voltage range of 2V to 6V.

Combining the tiny 6-pin, 2 x 2mm SON package with a maximum height of 0.8mm and a frequency of 2.25MHz, allows the TPS62290, TPS62260 and TPS62240 devices to save designers valuable board space in space-constrained battery power applications.

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