SI9140DQ VISHAY [Vishay Siliconix], SI9140DQ Datasheet - Page 10

• Manufacturer Part Number: SI9140DQ
• Description: MP Controller For High Performance Process Power Supplies
• Manufacturer: VISHAY [Vishay Siliconix]

Si9140
Vishay Siliconix
Figure 4 is a schematic diagram of a converter which produces
1.5 V for a GTL bus.
Each of these dc-to-dc converters has four major sections:
D PWM Controller—regulates the output voltage
www.vishay.com
10
(V
C5, 1000 pF
(V
5 V
IN
5 V
C5, 1000 pF
IN
C4, 330 pF
)
2 x 220 mF
)
C4, 330 pF
C6
0.1 mF
Tantalum
2 x 220 mF
C6
0.1 mF
Tantalum
TPS
C1
TPS
4.99 k
+
16.2 k
C1
R6
4.99 k
R5
+
16.2 k
R6
R5
C7
0.1 mF
C7
0.1 mF
1
2
3
4
5
6
7
8
R3
100
1
2
3
4
5
6
7
8
R3
100
MON
FB
V
V
COMP
NI
V
GND
GOOD
DD
REF
MON
V
FB
V
COMP
NI
V
GND
GOOD
DD
REF
C3
0.1 mF
Si9140
C3
0.1 mF
Si9140
U1
UVLO
FIGURE 4. 1.5-V Converter for GTL
ENABLE
U1
UVLO
ENABLE
PGND
C
R
PGND
OSC
OSC
SET
C
R
DR
D
V
OSC
OSC
SET
DR
S
S
V
D
FIGURE 3. 3.3 V@ 5 A
S
S
16
15
14
13
12
10
11
9
16
15
14
13
12
11
10
9
R13
10 k
D Switch and Synchronous Rectification
D Inductor—filters and stores the energy
D Input/Output Capacitor—filters the ripple
R13
10 k
220 pF
R9
20 k
220 pF
MOSFETs—delivers the power to the load
R9
20 k
1 mF
C9
C9
C8
1 mF
C8
+
Si4435DY
Si4410DY
Bus @ 5 A
Si4435DY
Si4410DY
R8
40.2 k
R7
100 k
R8
40.2 k
R7
100 k
R10
11 k
1000 pF
1000 pF
D1
D1FS4
C10
C10
D1
D1FS4
3 x 330 mF
10 mH
R12, 13.3 k
Tantalum
R12, 13.3 k
L1
3 x 330 mF
10 mH
Tantalum
L1
S-40699—Rev. H, 19-Apr-04
TPS
4.7 k
C2
R11
Document Number: 70026
TPS
4.7 k
R11
Coiltronics
CTX07-12891
C2
+
Coiltronics
CTX07-12891
+
3.3 V
(V
1.5 V
(V
OUT
OUT
)
)