Altera LCD Multimedia HSMC - Manual (Page 39)

2–31 Altera Corporation
LCD Multimedia HSMC August 2008
Power Supply
Power Supply Power Supplies
The power supply block distributes clean power from the 12 V and 3.3 V
input supply (from HSMC connector) to the LCD Multimedia HSMC
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.
Table 2–24 below lists Power Supplies board reference and
manufacturing information.
Board regulators are used to generate the voltages listed in Tables 2–25
Table 2–24. Power Supplies Manufacturing Information
Board Reference Device Description Manufacturer
Manufacturer Part
Number
Manufacturer
Website
REG1 DC/DC Converter +/-
5V for LCD Display Linear Technology LT3461ES6#TRPBF www.linear.com
REG2 DC/DC Converter for
+/- Voltages for LCD
Display Backlight Linear Technology LT3461ES6#TRPBF www.linear.com
REG3 Linear regulator for
5V output Linear Technology LT1117CTS-5#PBF www.linear.com
REG4 Linear regulator for
2.5V output Linear Technology LT1963AES8#PBF www.linear.com
REG5 Linear regulator for
1.8V output Linear Technology LT1963AES8#PBF www.linear.com
Table 2–25. Board Regulators
Output
Voltage (V)
Variance
(+/-mV)
MAX Current
(A)
Regulator
Board
Reference
Linear Technologies
Part #
Where Used
5V 50 mV 115mA REG1 LT3461ES6#TRPBF LCD Supply
26.4V 100mV - REG2 LT3461ES6#TRPBF LED Backlight
5V 50mV 800mA REG3 LT1117CTS-5#PBF PS2 Interface Supply
2.5V 27mV 1.5A REG4 LT1963AES8#PBF CPLD Bank Supply,
Level Shifter Supply
1.8V 27mV 1.5A REG5 LT1963AES8#PBF Video Decoder Supply