EP1S20F484C6N Altera, EP1S20F484C6N Datasheet - Page 846

• Manufacturer Part Number: EP1S20F484C6N
• Description: IC STRATIX FPGA 20K LE 484-FBGA
• Manufacturer: Altera
• Series: Stratix®r

Specifications of EP1S20F484C6N

• Number Of Logic Elements/cells: 18460
• Number Of Labs/clbs: 1846
• Total Ram Bits: 1669248
• Number Of I /o: 361
• Voltage - Supply: 1.425 V ~ 1.575 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Voltage Regulators
14–6
Stratix Device Handbook, Volume 2
Table 14–3
compared to switching regulators.
You can minimize the difference between the input and output voltages
to improve the efficiency of linear regulators. The dropout voltage is the
minimum allowable difference between the regulator’s input and output
voltage.
Linear regulators are available with fixed, variable, single, or multiple
outputs. Multiple-output regulators can generate multiple outputs (e.g.,
1.5- and 3.3-V outputs). If the board only has a 5.0-V power voltage
supply, you should use multiple-output regulators. The logic array
requires a 1.5-V power supply, and a 3.3-V power supply is required to
interface with 3.3- and 5.0-V devices. However, fixed-output regulators
have fewer supporting components, reducing board space and cost.
Figure 14–3
regulator.
Figure 14–3. Three-Terminal, Fixed-Output Linear Regulator
Adjustable-output regulators contain a voltage divider network that
controls the regulator’s output.
a three-terminal linear regulator in an adjustable-output configuration.
Requires few supporting components
Low cost
Requires less board space
Quick transient response
Better noise and drift characteristics
No electromagnetic interference (EMI)
radiation from the switching
components
Tighter regulation
Table 14–3. Linear Regulator Advantages & Disadvantages
V
IN
shows the advantages and disadvantages of linear regulators
shows an example of a three-terminal, fixed-output linear
Advantages
IN
Linear Regulator
Figure 14–4
ADJ
Less efficient (typically 60%)
Higher power dissipation
Larger heat sink requirements
shows how you can also use
OUT
Disadvantages
Altera Corporation
1.5 V
January 2005