Altera Cyclone II DSP Development Board - Manual (Page 74)

2–66 Reference Manual Altera Corporation
Cyclone II DSP Development Board August 2006
Power Supply
On-Board Power Regulators (U2, U7, U8, U9, U10, U23 & U24)
There are seven voltage regulators on the Cyclone II DSP development
board to control eight separate voltage rails. Two switching regulators
provide 3.3 V, 1.8 V, and 6 V. Five linear regulators provide 5 V, 1.2 V,
0.9 V, VCCA_DAC, and VCCA_ADC.
Table 2–35 describes each voltage
regulator. See Figure 2–24 for the locations of the voltage regulators on
the Cyclone II DSP development board.
Table 2–35. Cyclone II DSP Development Board Regulators
Board
Reference
Type
Voltage
Output
Provides Power To Manufacturer Part Number
U2 Dual
output
switching
regulator 3.3 V ● Cyclone II VCCIO banks 1, 2, 5, and 6
● Clock oscillators and buffers
● Expansion Prototype Connector
● SSRAM
● EPCS64
● LEDs and seven-segment displays
● DIP switches and push-buttons
● Audio CODEC
● Video DAC
Texas
Instruments
TPS51020
1.8 V ● DDR2 SDRAM DIMM
● Cyclone II VCCIO banks 3, 4, 7, and 8
TPS51020
U7 Linear
regulator 1.2 V ● Cyclone II VCCINT
● VCCA_PLL
● VCCD_PLL
UC382TD
U8 Linear
regulator 0.9 V ● DDR2 SDRAM VTT TPS51100
U9 Switching
regulator 6 V ● VCCA_ADC regulator
● VCCA_DAC regulator
TPS40055
U10 Linear
regulator 5 V ● Linear 0.9V regulator
● Expansion Prototype Connector card
voltage limiters
REG104GA
U23 Linear
regulator 3.3 V
5 V ● D/A Converter voltage REG104GA
U24 Linear
regulator 3.3 V ● A/D Converter voltage REG104GA