New Industry Products

Texas Instruments Unveils TPS65020 Power Management IC

October 06, 2005 by Jeff Shepard

Texas Instruments Inc. (TI, Dallas, TX) unveiled a highly integrated, power conversion integrated circuit (IC) that supports power supply requirements for OMAP™-based mobile handsets and XScale®-based multimedia devices. The TPS65020 power management unit integrates high-performance, analog building blocks to support multiple voltages in single-cell, lithium-ion-powered applications, such as smart phones, personal digital assistants, 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, and an I2C 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 1.2 A dc-dc steps down the system voltage with up to 97 percent efficiency at a 3.3 V output. A second 1 A converter supports system memory with up to 95 percent efficiency. The third 800 mA converter manages the power to the processor core with up to 90 percent efficiency. The device’s 1.5 MHz switching frequency allows designers to reduce board space by applying small external components, such as 2.2 µH inductors. Additional low-dropout regulators in the TPS65020 supply power to PLL, RTC, and SRAM subcomponents, and achieve a low quiescent current of only 85 µA.

To further conserve battery power, 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 also features a serial interface, which is compatible with the standard and fast-mode I2C specifications, allowing data transfers at up to 400 kHz. 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 now in volume production. The power management unit comes in a 40-pin, 5 mm x 5 mm QFN package, and is priced at $3.75 each in quantities of 1,000 units. Evaluation modules of the TPS65020, application notes, and an online power management product selection tool are also available.