Power Supply - HOLT ADK-2130mPCIe Technical Manual

Power supply

The 3.3aux power from the PCIe connector powers a double buck converter that generates the 1V and
1V8 power rails for the FPGA. A 'power good1' signal is used to enable two linear voltage regulators that
supply 1V and 1V2 to FPGA GBT PCIe transceiver rails. The 1V8 is used to turn on a MOSFET switch used
to switch on a separate 3V3 supply to meet Xilinx power sequencing recommendations to power the SPI
Flash, MEMS oscillator and the FPGA bank 14, 15 and 34 rails.
Supply Schematic Name
Voltage
1V VCCINT_1V
1.8V VCCAUX_1V8
3.3V VCCO3V3
3.3V 3V3aux
(PCIe conn.)
1.5V (PCIe MGTAVCC1V
conn.)
MGTAVCTT1V2
Table 6 – Power Supply Power
Function
FPGA logic
FPGA Aux
functions (JTAG)
FPGA I/O rails,
Flash, Osc and
Misc.
2 x HI-2130
Provides clean
power to the GBT
(PCIe bus)
Holt Integrated Circuits
28
Maximum Expected board usage
Capacity
800mA
800mA
1000mA
1600mA 1553 messaging duty
cycle dependant
150mA
150mA
200mA
100mA
200mA
<100mA
<100mA