Power management for FPGAs

Texas Instruments has developed a power management IC for Xilinx’s Spartan-II/IIE/3 series of field programmable gate arrays.

TI’s TPS75003 device integrates two 3-A DC/DC buck controllers with up to 95 percent efficiency to power the Spartan core and I/O rails, and one 300-mA low dropout (LDO) regulator that is stable with a ceramic output capacitor for powering the Spartan-3’s Vccaux rail or other low-power system voltage.

The new device includes several unique features including programmable soft-start for in-rush current control and independent enables for sequencing.

The TPS75003 meets all Xilinx startup profile requirements including monotonic ramp and minimum ramp times.

In addition to managing the power to Xilinx Spartan-II/IIE/3 FPGAs, the device can support other processors, such as TI’s digital signal processors (DSPs), application specific integrated circuits (ASICs) and other processor power supplies, including split-supply applications.

The device is currently sampling from TI and its authorised distributors. Volume production is scheduled for the fourth quarter.

Packaged in a low-profile, 4.5 mm x 3.5 mm x 0.9 mm 20-pin, QFN package, suggested resale pricing is $1.90 per unit in quantities of 1,000.

Additional FPGA power management solutions, including 12 tested and Xilinx-endorsed power reference designs for Spartan and Virtex families with full schematics, bills-of-materials, and implementation notes, are available.

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