VCU1525 Acceleration Platform User Guide
43
UG1268 (v1.0) November 13, 2017
Chapter 3:
Board Component Descriptions
The VCU1525 board uses power regulators from Linear Technology to supply the core and
auxiliary voltages. The V
CCINT
2-phase (of 6) regulator U41 is PMBus-compliant. The power
system regulators are listed in
.
Documentation describing PMBus programming for the Linear Technology power controller
is available at the Linear Technology website
. The PCB layout and power system
design meet the recommended criteria described in the Linear Technology website.
Monitoring Voltage and Current
Voltage and current monitoring and control are available for the Linear Technology V
CCINT
power controller U41 via the Linear Technology LTpowerPlay software graphical user
interface and the DC1613A USB-to-PMbus dongle. The onboard Linear Technology U41
LTC3884 power controller listed in
is accessed through the 2x5 PMBus connector
J1 provided for use with the Linear Technology DC1613A USB-to-PMbus dongle. This cable
can be ordered from the Linear Technology website
. The associated Linear
Technology LTpowerPlay GUI can be downloaded from the Linear Technology website. See
for more details.
Table 3-9:
Onboard Power System Devices
Rail Name
Power System Regulators
Schematic
Page
Number
Ref. Des.
Device Type
Vout (V)
Max. I (A)
VCCINT (Addr. 0x44)
U41
LTC3884EUK
0.85
40
14
Non-PMBus Regulators
VCCINT (phases 3 & 4)
U40
LTC3874EUFD
0.85
38.5
15
VCCINT (phases 5 & 6)
U39
LTC3874EUFD
0.85
38.5
16
SYS_5V5
U18
LT8607
5.5
1
16
VCC0V85
U11
LTC3636
0.85
8
17
VCC1V8
U24
LTC3636EUF
1.8
3
17
MGTVCCAUX
U24
Filtered branch of VCC1V8 power supply
17
VCC1V2_TOP (Mem.)
U6
LTC7150EY
1.2
17.5
18
VCC1V2_BTM (Mem.)
U20
LTC7150EY
1.2
17.5
19
MGTAVTT
U25
LTC3636EUF
1.2
8
19
DIMM Regulators
VPP_TOP
U7
LT8608
2.5
1.5
21
VPP_BTM
U23
LT8608
2.5
1.5
21
DDR4_C0_VTT
U53
TPS51200
0.6
3
21
DDR4_C1_VTT
U49
TPS51200
0.6
3
21
DDR4_C2_VTT
U32
TPS51200
0.6
3
21
DDR4_C3_VTT
U30
TPS51200
0.6
3
21
