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PMIC Reference Designs for Xilinx FPGAs and SoCs

Renesas Electronics has announced three easy to use Power
Management IC (PMIC) reference designs for powering the multiple supply rails
of Xilinx Artix-7 FPGAs, Spartan-7 FPGAs, and Zynq-7000 SoCs, with and without
DDR memory. Renesas says it has worked closely with Xilinx to offer low-risk
and easy to design power solutions to accelerate FPGA and SoC design. The
reference designs are said to speed the development of power supplies for a
variety of industrial and computing applications, including motor control,
machine vision cameras, programmable logic controllers (PLCs), home gateways
and appliances and portable medical and wireless equipment.

Renesas’ high efficiency PMIC reference designs provide
user-friendly turnkey solutions that enable a single design to support
different Xilinx speed grades and DDR memory types: DDR3, DDR3L, DDR4, LPDDR2
and LPDDR3. They are based on the four-phase, three output ISL91211AIK PMIC,
and the four-output ISL91211BIK PMIC.

Both PMICs can deliver up to 20A total output current and
feature independent dynamic voltage scaling. Their control loops are tuned to
optimally support the load profiles of Xilinx FPGAs. They manage power up and
shutdown sequencing of their rails internally, without requiring external
sequencing controllers. Applying 2MHz switching frequency and fast load
transient response enables each PMIC board to use 22uF output capacitors and a
small inductor to reduce solution size. The PMICs come in 4.7mm x 6.3mm,
35-ball BGA with 0.8mm pitch packages.

The ISL91211A-BIK-REFZ reference design board for Artix-7
devices employs the ISL91211AIK and ISL91211BIK multiphase PMICs, ISL80030 3A
synchronous buck DC/DC converter, and ISL21010DFH312 micropower voltage
reference. The PMICs deliver efficiency up to 95 percent for multiple power
rails and they accept 5V input from a plug-in AC/DC adaptor or DC power supply.
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.

The ISL91211BIK-REF2Z reference design board for
Spartan-7 devices employs 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.

The ISL91211AIK-REFZ reference design board for Zynq-7000
devices employs 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.

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The ISL91211A-BIK-REFZ reference board for Artix-7 FPGAs
is available now from Renesas Electronics’ worldwide distributors with a
recommended resale price of $168.00 USD. For more information, please visit: www.renesas.com/products/software-tools/boards-and-kits/reference-kits/isl91211a-bik-refz.html

The ISL91211BIK-REF2Z reference board for Spartan-7 FPGAs
is available now from Renesas Electronics’ worldwide distributors with a
recommended resale price of $160.00 USD. For more information, please visit: www.renesas.com/products/software-tools/boards-and-kits/reference-kits/isl91211bik-ref2z.html

The ISL91211AIK-REFZ reference board for Zynq-7000 SoCs
is available now from Renesas Electronics’ worldwide distributors with a
recommended resale price of $160.00 USD. For more information, please visit: www.renesas.com/products/software-tools/boards-and-kits/reference-kits/isl91211aik-refz.html

Each PMIC reference design board is supplied with a
user’s guide, complete schematic, bill of materials (BOM) and PCB layout files.

Renesas Electronics | www.renesas.com

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PMIC Reference Designs for Xilinx FPGAs and SoCs

by Circuit Cellar Staff time to read: 2 min