33
22 Sept 2016
v1.1
3.2 Molex to Non-ATX connection
If you choose to power the PZCC-FMC-V2 carrier in an enclosed PC chassis and do not want
to attach the external power adapter, an adapter ships with the kit. See Section 2.5 for details.
3.3 Power Rails
The table below lists the voltage rails, currents, and tolerances. 0.1% resistor values were used
on the 1.0V_AVCC and 1.2V_AVTT rails to improve the full load accuracy. C74, a bulk 12Vin
cap is placed to minimize ripple on the 12V power in rail. This component is placed on the
bottom side of the board due to top side space limitations. If this placement is undesirable, the
capacitor may be removed by the customer after power testing has been performed with it
removed. Avnet has not tested power performance with this component removed.
Voltage (V)
Tolerance
IC
Max DC
current
Functional area
12V Input
5%
Wall adapter, NOT ATX
compatible
5.0A
All power
PCIe 12V Input
10%
N/A, PCIe x1 card edge
10W = 833
mA,
25W = 2083
mA.
All power
5V
5%
U5, ADP2384ACP
3.0A
SOM VIN Header
VADJ - 1.8V, 2.5V or 3.3V
For SOM VCCIO 13, 34, 35
NOTE: For 7030 SOMs
VADJ MUST be set to 1.8V
ONLY!
5%
U6, ADP50502, CH1
4.0A
PZCC-FMC-V2 & SOM VCCIO
banks: 34, 35.
3.3V & VCCO_13
5%
U6, ADP50502, CH2
4.0A
PZCC-FMC-V2 logic, Pmod,
Ethernet, Vcco_13, LEDs
1.0V_AVCC
3%
U6, ADP50502, CH3
1.2A
SOM MGT Core
1.2V_AVTT
3%
U6, ADP50502, CH4
1.2A
SOM MGT
1.8V
5%
U6, ADP50502, CH5
200mA
microSD level translator, HDMI
Table 19 – Voltage Rails w/ Current Estimates
3.4 2.5V LDO – U12
The clock synthesizer U13 requires a VCCO of 2.5V. U12, an ADI LDO (ADP121-AUJZ25R7)
provides 2.5V at 150mA. This IC is always enabled by being pulled up to 3.3V.