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TI unveils smallest DC/DC converters for portable designs

Posted: 03 Aug 2007     Print Version  Bookmark and Share

Keywords:DC/DC Converters  low-power DSPs  precise processor core 

Texas Instruments Incorp has introduced 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 high-performance converters save valuable board space.

TI?s 300-mA, 600-mA and 1-A synchronous, step-down DC/DC converters can efficiently regulate output voltages down to 0.6 V with ?1.5 percent accuracy, enabling the devices to power TI?s newest C5000 and DaVinci DSPs, low-power MSP430 microcontrollers and other controllers with precise processor core supply requirements.

The TPS62290 provides up to 1 A of output current, and can be powered by a single-cell lithium-ion, three-cell nickel metal hydride and three-cell alkaline batteries with an input voltage range of 2.3 V to 6 V. The converter, 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 600-mA of output current, and the TPS62240 to support up to 300-mA. Both devices contain the same functionality and high-performance as the TPS62290 but can support a slightly wider input voltage range of 2 V to 6 V.

According to Ram Ananth, engineering manager, Power Management Products, Texas Instruments (India) Pvt Ltd, ?The TPS62290, TPS62260 and TPS62240 devices are suitable for today?s environment, where the focus is on portability and extended battery life in consumer applications. By providing our customers with the industry?s most precise voltage regulation solutions, TI continues to focus on innovation in technology.?

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

Suggested retail pricing for the TPS62240 is Rs.38.77 ($0.95) in 1,000-piece quantities. The TPS62260 is priced at Rs.48.97 ($1.20) and the TPS62290 is available at Rs.71.42 ($1.75) in 1,000-piece quantities.

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