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| EP1S80F1020C6 Datasheet, PDF (858/864 Pages) Altera Corporation – Stratix Device Handbook, Volume 1 | |||
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Voltage Regulators
Figures 14â16 and 14â17 show the switching regulator that converts 3.3 V
to 1.5 V with different output currents.
Figure 14â16. EL7562CM: 3.3-V to 1.5-V/2-A Synchronous Switching Regulator
VIN
3.3 V
R3
39 Ω
0.1
C3
μF
C4
270 pF
C1
100 μF
C2
0.1 μF
1
SGND
2 COSC
3
VDD
4
PGND
5
PGND
6
VIN
7
VIN
8
EN
PGND
VREF
16
C5
0.1 μF
15
14
FB
D2
13
D3
VDRV
12
LX
C8
0.1 μF
11
LX
10
VHI
9
PGND
C6
0.1 μF
EL7562CM
D4
C9
0.1 μF
L1
2.5 μH
C7
100 μF
R2
539 Ω
R1
1 kΩ
VOUT
1.5 V
2A
Figure 14â17. EL7563CM: 3.3-V to 1.5-V/4-A Synchronous Switching Regulator
VIN
3.3 V
R4
22 Ω
C3
0.22 μF
C1
330 μF
C5
0.1 μF
1
2
VREF
SGND
C4
390 pF
3
COSC
4
C2
2.2 nF
5
VDD
VTJ
6
PGND
7
PGND
8
VIN
9
STP
10
STN
20
EN
FB 19
18
PG
D2
D4
17
VDRV
16
VHI
C6
0.22 μF
15
LX
14
LX
13
PGND
12
PGND
11
PGND
L1
2.5 μH
D3
C9
D1
0.1 μF
C7
330 μF
C10
2.2 nF
EL7563CM
C8
0.22 μF
R2
513 Ω
R1
1 kΩ
VOUT
1.5 V
4A
14â18
Stratix Device Handbook, Volume 2
Altera Corporation
January 2005
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