Table 2-1. Primary power supply (continued)
Power supply Description
Iin < 8.5 A at 100 Vac, 4 A at 240 Vac
Power good Power-on delay time of 100 ~ 500 ms
Operating temperature range 0 ~ 50 °C on full load
Relative humidity 20~ 80%
Table 2-2. 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 2-3. 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,
Table continues on the next page...
Chapter 2 LX2160ARDB Functional Description
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 0, 09/2018
NXP Semiconductors 21
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