Texas Instruments has released a buck-boost power management integrated circuit that helps extend battery life in smart phones, digital still cameras and other single-cell, Li-Ion powered multimedia devices.
The DC-DC converter delivers up to 96% efficiency over a wide input voltage range of 1,8-5,5 V, while generating an output current up to 1,2 A.
"Portable designers continue to face an uphill battle when it comes to getting more out of their battery," said Dave Heacock, vice president of TI's portable power management business. "Texas Instruments continues to work closely with the top 3G wireless handset, digital still camera and other portable electronics makers to ensure they are maximising all of the potential energy in a Li-Ion battery and meet consumers' appetites for extended battery life."
Offered in the space-saving 3 x 3 mm² QFN package, TI says that its new TPS63000 buck-boost converter provides up to 28% greater run-time compared to a standard high-efficiency buck converter with a 3,3 V output. Based on a fixed frequency, pulse-width modulation technique, the device uses synchronous rectification to maintain high efficiency. Its ability to support input voltages down to 1,8 V allows designers to implement newer, denser lithium-based battery chemistries in TI OMAP processor-based handsets and other multimedia applications.
Output voltages are adjustable down to 1,2 V, and quiescent current is less than 30 μA. The TPS63000 enters a power save mode at low power operation, which can be disabled, forcing the converter to operate at a fixed switching frequency. The converter also can be disabled to minimise battery drain. The TPS63000 operates in a fixed frequency of 1,5 MHz that allows use of a 2,2 μH inductor.
Evaluation modules of the TPS63000, application notes and TI's new Q2 Power Management Selection Guide are available at www.ti.com/tps63000-pr.
For more information contact Rodney Farrow, Arrow Altech Distribution, +27 (0)11 923 9600, rfarrow@arrow.altech.co.za
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