EP1S40B956C5 Altera, EP1S40B956C5 Datasheet - Page 847

• 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: -

Figure 14–4. Adjustable-Output Linear Regulator
Altera Corporation
January 2005
V
IN
+
C
1
IN
Linear Regulator
I
ADJ
Switching Voltage Regulators
Step-down switching regulators can provide 3.3-V-to-1.5-V conversion
with up to 95% efficiencies. This high efficiency comes from minimizing
quiescent current, using a low-resistance power MOSFET switch, and, in
higher-current applications, using a synchronous switch to reduce diode
losses.
Switching regulators supply power by pulsing the output voltage and
current to the load.
of switching regulators compared to linear regulators. For more
information on switching regulators, see Application Note 35: Step Down
Switching Regulators from Linear Technology.
There are two types of switching regulators, asynchronous and
synchronous. Asynchronous switching regulators have one field effect
transistor (FET) and a diode to provide the current path while the FET is
off (see
Highly efficient (typically >80%)
Reduced power dissipation
Smaller heat sink requirements
Wider input voltage range
High power density
ADJ
Table 14–4. Switching Regulator Advantages & Disadvantages
Figure
OUT
Advantages
14–5).
V
Table 14–4
REF
R
R
1
2
+
shows the advantages and disadvantages
C
2
V
Generates EMI
Complex to design
Requires 15 or more supporting
components
Higher cost
Requires more board space
OUT
Stratix Device Handbook, Volume 2
= [V
REF
Designing with 1.5-V Devices
× (1 +
Disadvantages
R
R
1
2
)] + (I
ADJ
× R
1
)
14–7