AC701 Evaluation Board www.xilinx.com 67
UG952 (v1.3) April 7, 2015
Feature Descriptions
input voltage rail between 4.5V and 14.5V and deliver an adjustable output voltage in the
0.6V to 5.5V range. This type of power solution allows as few as three external components
and eliminates the loop compensation and magnetic parts selection process.
LMZ31700 Family Regulator Description
The LMZ31710 power module is a step-down DC-DC switching regulator capable of
driving up to 10A load. The LMZ31710 can accept an input voltage rail between 4.5V and
17V, and deliver an adjustable and highly accurate output voltage as low as 0.6V. The
LMZ31710 requires two external resistors and external capacitors to complete the design.
The LMZ31710 is a reliable and robust design with these protection features: thermal
shutdown, programmable input under-voltage lockout, output over-voltage protection,
short-circuits protection, output current limit, and allows start -up into a pre-biased
output. The sync input allows synchronization over the 200
kHz to 1200 kHz switching
frequency range and up to six modules can be connected in parallel for higher load
currents.
Table 1-31 shows the AC701 board power system configuration for controller U8.
Table 1-31: Controller U8 Power System Configuration
Sequencer
Schematic
Regulator Type Voltage Current
Page Contents Net Name
#1 U8 PMBus
Addr 101, 4 Rails
39 UCD90120A #1
40 Addr 101, Rail 1 VCCINT LMZ31710 (U49) 1.0V 10A
41 Addr 101, Rail 2 VCCAUX LMZ31506 (U53) 1.8V 6A
42 Addr 101, Rail 3 VCCBRAM LMZ31503 (U54) 1.0V 3A
43 Addr 101, Rail 4 FPGA_1V5 LMZ31506 (U55) 1.5V 6A
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