Functional Description; Power Supplies - Digilent Cmod S7 Reference Manual

22.8.2018
available for download at the Cmod S7 Resource Center
The Cmod S7 can be used with Vivado 2017.4, but WebPACK installations of this version of Vivado may not contain the device files for
the specific Spartan-7 FPGA used on the Cmod S7. See this
(https://www.xilinx.com/support/answers/70505.html)

Functional Description

1 Power Supplies

The Cmod S7 uses a Linear Technologies LTC3569 triple output buck power regulator to generate the needed voltages for the onboard
components. It is connected as shown in Figure 1.1. The characteristics of the outputs are shown in Table 1.1.
(https://reference.digilentinc.com/_detail/reference/programmable-logic/cmod-s7/cmod-s7-power.png?id=reference%3Aprogrammable-
logic%3Acmod-s7%3Areference-manual)
Figure 1.1 Power Supply
Supply
3.3V FPGA User I/O, USB Controller, Flash Memory, Pmod Connector, LEDs,
Buttons
1.8V FPGA, USB Controller
1.0V FPGA Core and Block RAM ()
Table 1.1 Power Rail Characteristics
1.1 Power Input Options
It is possible to power the Cmod S7 from either USB or from an external power supply attached to pins 24 and 25 of the DIP headers,
labeled "VU" and "GND ()", respectively. The required characteristics of a power source attached to either of these two options is
outlined in Table 1.1.1.
Connector Type
USB
DIP
https://reference.digilentinc.com/reference/programmable-logic/cmod-s7/reference-manual
Cmod S7 Reference Manual [Reference.Digilentinc]
(https://reference.digilentinc.com/reference/programmable-logic/cmod-s7/start)
Xilinx Answer Record
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for more information, and for a solution.
Circuits
Connector Label
J5
J3 (Pin 24)
Device
IC6:
LTC3569
IC6:
LTC3569
IC6:
LTC3569
Min/Rec/Max Voltage
Per USB Specification
4.5/5.0/5.5
.
Maximum
Current
1.2A
0.6A
0.6A
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