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Table 4. Secondary power supplies (continued)
Part
identifi
er
Manufacturing
part number
Part
manufacturer
Power
supply
Specifications
Description
MVREF
0.6 V at 3 A
Reference voltage for DDR4 DRAM
memories
U6
MC34VR500V9
ES
NXP
Semiconductors
1V0, 2V5,
1V35, 1V8
• 1.0 V at 1.1 A
• 2.5 V at 0.8 A
• 1.35 V at 0.4 A
• 1.8 V at 2.5 A
Multi-output DC/DC regulator with four
switched outputs, two LDO outputs (VDD
and DDR enable), and one reset control
output to CPLD (RST_OUT). Four
switched outputs are:
• SW1LX: 1.0 V for the QSGMII PHY
VDD and VDDA
• SW2LX: 2.5 V for QSGMII PHY
VDD25, VDD25A, and DDR4 memory
VPP
• SW3LX: 1.35 V; Filtered 1.35 V is
supplied to LS1028A X1VDD,
AVDD_SD1_PLL1, and
AVDD_SD1_PLL2
• SW4LX: 1.8 V for board components:
UART transceiver, XSPI memories,
eMMC memory IO, CPLD IO bank3,
clockgen VDD and VDDA
Filtered 1V8 also
powers LS1028A
power supplies:
AVDD_CGA1,
AVDD_CGA2,
AVDD_PLAT,
DP_SAVDD,
AVDD_D1, and
AVDD_PIXEL.
NOTE
Jumper-enabled
1V8 also powers
PROG_MTR and
PROG_SFP.
NOTE
Table continues on the next page...
LS1028ARDB Functional Description
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
18
COMPANY CONFIDENTIAL
NXP Semiconductors
Содержание QorIQ LS1028A
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