Table 5. ATX12V/EPS12V power supply characteristics
Group Outputs
Unit
Voltage +3.3 +5 +12 -12 +5 (SB) V
Maximum load 10 14 25 0.3 2.0 A
Minimum load 0.5 1 2 0 0.1 A
Regulation ±5 ±5 ±5 ±10 ±5 %
Ripple and noise 60 60 120 120 50 mV
Capacitive loads 10000 10000 10000 330 10000 μF
2.1.2 Secondary power supplies
The table below lists the secondary power supplies for the LX2160ARDB. These supplies are derived from the ATX power supply
unit and they are used to power various onboard devices. A few are on all the time, while most others are enabled and disabled
in a particular order, as controlled by the CPLD system controller.
Table 6. Secondary power supplies
Part
identifier
Manufacturing
part number
Part
manufacturer
Power supply Specifications Description
U12 LTC3882 Linear
Technology
VDD 0.825 V at 70 A with ±3%
accuracy
Supplies power to the
LX2160A cores
U16 LTC7150 Linear
Technology
GVDD 1.2 V at 20 A with ±3%
accuracy
Supplies power to the
LX2160A DDR controllers,
DDR memories, and DDR
memory termination
power supplies (VTT1 and
VTT2)
U15 LTC7150 Linear
Technology
OVDD 1.8 V at 20 A with ±3%
accuracy
Supplies power to the
LX2160A general I/O
drivers. OVDD also
supplies power to the
PROG_MTR and
TA_PROG_SFP pins,
through J8 and J9
jumpers, respectively,
which are normally open
(unmounted).
Filtered OVDD
power is also
supplied to the
core CPU PLLs
(AVDD[1:5] and
AVDD_D[1:2]).
NOTE
Table continues on the next page...
NXP Semiconductors
LX2160ARDB Functional Description
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 4, 07/2020
Reference Manual 14 / 116
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