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Maxim > Design Support > Technical Documents > Reference Designs > Power-Supply Circuits > APP 5449
Keywords: FPGA, Xilinx, ARM, CPU, SOC, processor, micro, microcontroller, Cortex, multicore, power, power module, Zynq, Zedboard, reference
design, point of load regulator, power supply, POL, extensible processing platform, EPP
REFERENCE DESIGN 5449 INCLUDES: Tested Circuit Schematic BOM
Powering the Zynq Evaluation and Development Board (ZedBoard)
By: Takahiro Hayashi
Murali Malla
Aug 21, 2012
Abstract: This reference design explains how to power the Xilinx Zynq Extensible Processing Platform (EPP) and peripheral ICs using Maxim's
power-supply solutions.
This fully tested reference design provides a complete solution for powering the Xilinx® Zynq® Extensible Processing Platform (EPP). The board
was developed by Avnet and Digilent in close collaboration with Xilinx and Maxim. The Zynq device requires nine unique power supply rails
(Table 1).
Table 1. Power Rail Descriptions
Symbol Description Output Voltage Current Maxim Solution
V
CCODDR
Processing system DDR I/O supply voltage 1.5V 1.5A
MAX15021
V
CCINT
Programmable logic (PL) internal supply voltage 1.0V 1.3A
Adjustable V
CCO
Power supply for I/O banks 3.3V/2.5V/1.8V 2A
MAX15021
V
CCO
Power supply for I/O banks 3.3V 3A
V
CCAUX
PL auxiliary supply voltage 1.8V 0.8A MAX15053
V
CCADC
XADC supply 1.8V 150mA MAX1983
V
REFP
External reference voltage for XADC 1.25V 5mA MAX6037A
V
TT
DDR3 termination supply 0.75V 1A MAX1510
V
CC5V0
5V power supply from 12V 5V 6A MAX8686
This reference design provides the required nine power rails to the Zynq device, DDR3 memory, FMC connector, and other devices on the board.
This is done using two MAX15021 dual-output monolithic synchronous pulse-width modulation (PWM) step-down regulators, one MAX15053
high-efficiency synchronous step-down regulator, the MAX1983 low-dropout linear regulator, the MAX6037A reference voltage, the MAX1510
low-voltage DDR linear regulator, and the MAX8686 monolithic synchronous step-down regulator. Customers who can use 5V as V
IN
do not need
the MAX8686 in their designs. All devices can be sequenced at power-up, as indicated in Figure 1.
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