lx1665 Microsemi Corporation, lx1665 Datasheet - Page 10

• Manufacturer Part Number: lx1665
• Description: Dual Output Pwm Controllers With 5-bit Dac
• Manufacturer: Microsemi Corporation

LX1664/64A, LX1665/65A
10
VID0
VID1
VID2
VID3
VID4
VID0
VID1
VID2
VID3
VID4
0.1µF
FIGURE 8 — VRM 8.2 (Pentium II / Deschutes) Reference Design With Loss-Less Current Sensing
0.1µF
C
3
C
3
FIGURE 9 — Full-Featured Pentium II Processor Supply With 12V Power Input
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
D
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
UAL
SS
INV
V
VID0
VID1
VID2
VID3
VID4
L
FB
CC_CORE
SS
INV
V
VID0
VID1
VID2
VID3
VID4
L
Wide-Body SOIC
FB
CC_CORE
Wide Body SOIC
LX1665
O
P
18-pin
LX1665
A P P L I C A T I O N I N F O R M A T I O N
UTPUT
18-pin
U1
R O D U C T I O N
U1
PWRGD
PWRGD
BDRV
TDRV
GND
BDRV
TDRV
GND
V
OV
L
V
PWM C
DRV
OV
L
C
V
V
C1
CC
DRV
C
CC
T
C1
T
1N4148
18
17
16
15
14
13
12
11
10
18
17
16
15
14
13
12
11
10
12V
D
ONTROLLERS WITH
2
R
PWRGD
C
2
C
1500µF
5
, 10k
C
1µF
8
5
1N4148
OV
D
C
680pF
R
10
1µH
A T A
8
C
0.1µF
7
L
D
10
1N5817
2
PWRGD
3
D
Q
IRL3303
4
F
Q
IRL3102
1
1
2
15A
S
F
Q
IRL3303
Q
IRL3102
H E E T
Q
IRLZ44
1
1
2
5-B
4
C
6.3V
1500µF x3
20A
R
R
2
R
R
5
6
5
6
5V
IT
12V
Q
IRLZ44
L
DAC
1
4
2.5µH
5V or 3.3V
Supply
6.3V
1500µF x3
2N6504
C
330µF
C
5V
R
9
C
330µF
2
C
330µF
S
SCR
2.5µH
7
C
330µF
9
Q
C
7
L
Supply Voltage
For I/O Chipset or GTL+ Bus
1
3
S
0.0025
1.5V for
GTL+ Bus Supply
R
1
Supply Voltage
for CPU Core
C
6.3V, 1500µF x 3
** Three capacitors for Pentium
Four capacitors for Pentium II
1
Supply Voltage
for CPU Core
C
1
V
OUT
V
OUT