EP1S40B956C5 Altera, EP1S40B956C5 Datasheet - Page 849

• Manufacturer Part Number: EP1S40B956C5
• Description: IC STRATIX FPGA 40K LE 956-BGA
• Manufacturer: Altera
• Series: Stratix®r

Specifications of EP1S40B956C5

• Number Of Logic Elements/cells: 41250
• Number Of Labs/clbs: 4125
• Total Ram Bits: 3423744
• Number Of I /o: 683
• Voltage - Supply: 1.425 V ~ 1.575 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 956-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

Altera Corporation
January 2005
Selecting Voltage Regulators
Your design requirements determine which voltage regulator you need.
The key to selecting a voltage regulator is understanding the regulator
parameters and how they relate to the design.
The following checklist can help you select the proper regulator for your
design:
■
■
■
■
■
■
Choose a Regulator Type
If required, select either a linear, asynchronous switching, or
synchronous switching regulator based on your output current, regulator
efficiency, cost, and board-space requirements. DC-to-DC converters
have output current capabilities from 1 to 8 A. You can use a controller
with an external MOSFET rated for higher current for higher-output-
current applications.
Calculate the Maximum Input Current
Use the following equation to estimate the maximum input current based
on the output power requirements at the maximum input voltage:
Where
60% for linear 2.5-V-to-1.5-V conversion, 45% for linear 3.3-V-to-1.5-V
conversion, and 30% for linear 5.0-V-to-1.5-V conversion.
Once you identify the design requirements, select the voltage regulator
that is best for your design.
Technology and Elantec regulators available at the time this document
Do you require a 3.3-V, 2.5-V, and 1.5-V output (V
What precision is required on the regulated 1.5-V supplies (line and
load regulation)?
What supply voltages (V
What voltage variance (input voltage range) is expected on V
V
What is the maximum I
What is the maximum current surge (I
will need to supply instantaneously?
I
IN,DC(MAX)
CC
?
is nominal efficiency: typically 90% for switching regulators,
=
V
OUT
η × V
× I
IN(MAX)
OUT(MAX)
Tables 14–5
CC
IN
(I
or V
OUT
) required by your Altera
CC
) are available on the board?
Stratix Device Handbook, Volume 2
and
OUT(MAX)
14–6
Designing with 1.5-V Devices
list a few Linear
) that the regulator
OUT
)?
®
device?
IN
14–9
or