Renesas and Xilinx worked closely on the power solutions to quicken FPGA and SoC implementation. The new high efficiency PMIC reference designs are turnkey solutions that allow a single design to support different Xilinx speed grades and DDR memory types: DDR3, DDR3L, DDR4, LPDDR2 and LPDDR3. The PMICs are based on the four-phase, three output ISL91211AIK PMIC, and the four-output ISL91211BIK PMIC. The PMICs are able to provide up to 20A total output current and have independent dynamic voltage scaling. Their control loops have been tuned to support the load profiles of Xilinx FPGAs. They are designed to manage power up and shutdown sequencing of their rails without the need for external sequencing controllers. The 2MHz switching frequency and fast load transient response allows each PMIC board to use 22uF output capacitors and a small inductor for a smaller overall solution size. The PMICs are available in 4.7mm x 6.3mm, 35-ball BGA with 0.8mm pitch packages.
Reference board for Xilinx Artix-7 FPGAs
The ISL91211A-BIK-REFZ reference design board for Artix-7 devices uses the ISL91211AIK and ISL91211BIK multiphase PMICs, ISL80030 3A synchronous buck DC/DC converter, and ISL21010DFH312 micropower voltage reference. The PMICs provide up to 95 percent efficiency for multiple power rails and work off a 5V input. The ISL80030 supports VCCO and VCC_IO for 3.3V, 2.5V and 1.8V, and the ISL21010DFH312 is for XADC input voltage of 1.25V with ±0.2% accuracy.
Reference board for Xilinx Spartan-7 FPGAs
The ISL91211BIK-REF2Z reference design board for Spartan-7 devices uses the ISL91211BIK multiphase PMIC and ISL80030 3A synchronous buck DC/DC converter. The ISL91211BIK is required for VCCINT, VCCBRAM, VCC_DDR, VCCAUX and VTT, and it accepts 5V input from a plug-in AC/DC adaptor or DC power supply. The ISL80030 DC/DC converter supports VCCO and VCC_IO for 3.3V, 2.5V and 1.8V rails.
Reference Board for Xilinx Zynq-7000 SoCs
The ISL91211AIK-REFZ reference design board for Zynq-7000 devices is built around the ISL91211AIK multiphase PMIC, ISL9123 low Iq buck regulator and two ISL80030 3A synchronous buck DC/DC converters. The ISL91211AIK is required for VCCINT, VCCBRAM, VCC_DDR, and VCCAUX. The ISL9123 supplies the VTT power rail, and two ISL80030 DC/DC converters support VCCO and VCC_IO for 3.3V, 2.5V and 1.8V rails.