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TI's new dc-dc converter extends battery life of portable apps

Posted: 29 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? step-down converter? converter? tps62110?

Texas Instruments Inc. (TI) announced a 1.5A dc-dc step-down converter that supports from 3.1V to 17V of input voltage. This new IC achieves 95 percent power efficiency to extend battery life in industrial handhelds, portable test equipment and consumer devices powered by two- to three-cell lithium-based batteries or a 12V power source.

The TPS62110 synchronous, step-down converter with integrated FETs promises to deliver unprecedented levels of power conversion efficiency and performance in a Pb-free, 4-by-4mm QFN package. The device, which leverages the company's new LBC7 analog process manufacturing technology, is able to maintain high efficiency over a wide load current range by entering a power-saving pulse-frequency modulation (PFM) mode at light load currents and supporting output voltages from 16V down to 1.2V. The converter can be placed in a shut down mode, reducing power consumption to less than 2?A.

The converter's 1MHz switching frequency allows portable device designers to reduce board space by applying smaller external components without compromising performance and efficiency. The TPS62110 can be synchronized to an external clock signal between 0.8MHz and 1.4MHz. And for even lower noise operation, the device can operate in a pulse-width modulation- (PWM) only mode.

The TPS6211x family of converters is already available in volume quantities. These dc-dc converters come in a highly reliable, 16-pin, QFN package, and are priced at $2.50 each in quantities of 1,000 units.

LBC7 analog process

The TPS62110 is based on TI's LBC7 high-performance analog process, which allows the company to create power conversion ICs with one of the industry's lowest specific ON-resistance or RDS(on), and the capability for future devices to handle 30V supply voltages.

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