PRODUCT DATABOOK 1996/1997
LX1664/1664A, LX1665/65A
D
UAL
O
UTPUT
PWM C
ONTROLLERS
P
R O D U C T I O N
WITH
5-B
IT
DAC
D
A T A
S
H E E T
A P P L I C AT I O N I N F O R M AT I O N
12V
C
3
0.1µF
1
2
3
5V
6.3V
1500µF x3
C
2
Q
1
IRL3102
U1
LX1664
SS
INV
V
CC_CORE
VID0
VID1
VID2
VID3
VID4
V
C1
TDRV
GND
BDRV
V
CC
C
T
L
DRV
L
FB
16
15
14
13
12
11
10
9
C
5
1µF
VID0
VID1
VID2
VID3
VID4
4
5
6
7
8
L
1
, 2.5µH
Q
2
C
8
680pF
IRL3303
R
1
2.5m9
Supply Voltage
for CPU Core
V
OUT
6.3V, 1500µF x 3**
C
1
16-pin
Narrow Body SOIC
C
9
330µF
Q
4
IRLZ44
R
5
R
6
** Three capacitors for Pentium
Four capacitors for Pentium II
C
7
330µF
Supply Voltage
For I/O Chipset or GTL+ Bus
FIGURE 6
— LX1664 In A Pentium / Socket 7 Single-Chip Power Supply Controller Solution (Synchronous)
C
3
0.1µF
1
2
3
12V
5V
C
5
1µF
Q
1
IRL3102
D
1
U1
LX1664
SS
INV
V
CC_CORE
VID0
VID1
VID2
VID3
VID4
V
C1
TDRV
GND
BDRV
V
CC
C
T
L
DRV
L
FB
16
15
14
13
12
11
10
9
6.3V
1500µF x3
C
2
R
1
0.005
Supply Voltage
for CPU Core
VID0
VID1
VID2
VID3
VID4
4
5
6
7
8
L
1
, 5µH
C
1
Q
4
IRLZ44
R
5
R
6
C
9
330µF
C
7
330µF
V
OUT
6.3V, 1500µF x 3**
** Three capacitors for Pentium
Four capacitors for Pentium II
16-pin
Narrow Body SOIC
C
8
680pF
Supply Voltage
For I/O Chipset or GTL+ Bus
FIGURE 7
— LX1664 In A Non-Synchronous / Socket 7 Power Supply Application
Copyright © 1999
Rev. 1.2 11/99
9
MICROSEMI [ MICROSEMI CORPORATION ]
