User guide

60 www.xilinx.com AC701 Evaluation Board
UG952 (v1.1) January 30, 2013
Chapter 1: AC701 Evaluation Board Features
The UCD90120A device is configured by using the PC-based TI Fusion Digital Power
Designer software. This software provides a graphical user interface (GUI) for configuring,
storing, and monitoring power system operating parameters.
TPS84K Family Regulator Description
The TPS84621RUQ (6A) and TPS84320RUQ (3A) regulators are integrated synchronous
buck switching regulators that combines a DC/DC converter with power MOSFETs, an
inductor, and passives into low profile, BQFN packages. The TPS84K devices accept an
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 power solution allows as few as 3 external components and
eliminates the loop compensation and magnetic parts selection process.
LMZ22000 Family Regulator Description
The LMZ22010 power module is an step-down DC-DC switching regulator capable of
driving up to 10A load. The LMZ22010 can accept an input voltage rail between 6V and
20V and deliver an adjustable and highly accurate output voltage as low as 0.8V. The
LMZ22010 requires two external resistors and external capacitors to complete the design.
The LMZ22010 is a reliable and robust design with the following protection features:
thermal shutdown, programmable input under-voltage lockout, output over-voltage
protection, short-circuits protection, output current limit, and allows startup into a
pre-biased output. The sync input allows synchronization over the 314 kHz to 600 kHz
switching frequency range and up to 6 modules can be connected in parallel for higher
load currents.
Table 1-27 shows the AC701 board power system configuration for controller U8.
Table 1-27: 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 LMZ12010 (U49) 1.0V 10A
41 Addr 101, Rail 2 VCCAUX TPS84621 (U53) 1.8V 6A
42 Addr 101, Rail 3 VCCBRAM TPS84320 (U54) 1.0V 3A
43 Addr 101, Rail 4 FPGA_1V5 TPS84621 (U55) 1.5V 6A