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TI power conversion chip targets OMAP-based mobile handsets

Posted: 07 Oct 2005 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? power conversion ic? omap? xscale?

Texas Instruments Inc. (TI) has unveiled a power conversion IC that supports power supply requirements for OMAP-based mobile handsets and XScale-based multimedia devices. The new TPS65020 IC integrates high-performance analog building blocks to support multiple voltages in single-cell Li-ion powered applications, such as smart phones, PDAs, digital still cameras and portable audio and media players. The device incorporates three synchronous step-down DC/DC converters with integrated FETs, three linear regulators (LDOs), and an I?C communications interface that allows full programmability and dynamic voltage scaling of the core voltage.

The TPS65020's three integrated converters are designed to efficiently transfer the core voltage, peripheral, I/O and memory rails of a PXA270, OMAP1610 or OMAP1710 processor-based system. A 1.2A DC/DC steps down the system voltage with up to 97 percent efficiency at a 3.3V output, while the second 1A converter supports system memory with up to 95 percent efficiency and the third 800mA converter manages the power to the processor core with up to 90 percent efficiency. The device's 1.5MHz switching frequency allows designers to reduce board space by applying small external components, such as 2.2?H inductors. Additional low-dropout regulators in the TPS65020 supply power to PLL, RTC and SRAM subcomponents, and achieve a low quiescent current of 85?A.

To further conserve battery power, TI added, the TPS65020's DC/DC switch-mode converters enter a low-power mode at light load for maximum efficiency across the widest possible range of load current. The device features a serial interface, which is compatible with the standard and fast-mode I?C specifications, allowing data transfers at up to 400kHz. The interface adds flexibility to the power supply solution and enables instant programmability via dynamic voltage scaling reacting to changing system requirements.

The TPS65020 is available in volume production from TI and its authorized distributors. This device comes in a highly reliable, 40-pin, 5-by-5mm QFN package, and is priced at $3.75 each in quantities of 1,000 units. Evaluation modules of the TPS65020 are also available.

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