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P5040/P5020 Reference Design Board User Guide, Rev. 0
Freescale Semiconductor
35
Architecture
Figure 17. Power Supplies
5.3.1.1
PDN of Main Power Supplies
To reduce cost, a LTC3880 switcher regulator is used to supply both VDD_CA and VDD_CB (core volt-
age) up to 30A, 1% tolerance. The same chip is also used to supply VDD_PL(platform voltage).
5.3.1.2
PDN Options
shows various main power supplies combination used for different DUT types (depends on
PROC_SEL switches: SW7[6:7], SW15[5]) as well as a lot of other optional power combinations which
could be used for testing purposes. Power options supported are for P5040/P5021 and P5020/P5010 as
shown highlighted in pink in the table below.