Power Supply - Altera Cyclone III FPGA Reference Manual

Power Supply

Power Supply
Table 2–18. Board Regulators
Output MAX
Variance
Voltage Current
(+/- mV)
(V) (A)
1.20 50 3.0
1.25 50 1.0
2.50 50 6.0
1.80 80 1.5
3.30 100 2.0
12.00 200 1.0
Note to Table 2–18:
(1) A 0.01 current sense resistor has been added to select jumper points for FPGA core power and I/O power
measurement.
f
2–22
Cyclone III FPGA Starter Board
The power supply block distributes clean power from the 12 V input
supply to the Cyclone III device through on-board regulators.
To provide various voltage options, the board uses several Linear
Technologies' regulators. Switching regulators are used for digital circuits
and linear regulators are used for analog circuits. Board regulators are
used to generate the voltages listed in
Board Regulator
Access Board
Point Reference
JP6 (1) REG4
JP4 REG2
(1)
JP3 REG1
JP7 REG5
JP5 REG3
SW1 N/A
You can measure the core and I/O voltage with a current meter while the
Cyclone III device is in standby mode. For more information on this
circuit, refer to the Cyclone III FPGA Starter Kit Getting Started User Guide.
Reference Manual
Table 2–18.
Linear
Technologies
Part #
LT1959CS8 Cyclone III Core voltage
LTC3413 DDR termination voltage
LTM4603EV DDR, SRAM, Flash, PLLs, other
bias voltages
LT1959CS8 Parallel flash interface, USB buffers
and other I/O
LT1959CS8 I/O voltage and power for most
components including HSMC
N/A Input supply voltage. All other
voltages (including HSMC voltage)
are derive from this regulator.
Where Used
Altera Corporation
October 2007