lx1660 Microsemi Corporation, lx1660 Datasheet - Page 8

• Manufacturer Part Number: lx1660
• Description: Advanced Pwm Controller
• Manufacturer: Microsemi Corporation

LX1660/1661
8
PWRGD
OUTEN
Note 1.
Figure 5 — Full Featured Voltage Regulator Using LX1661 Controller And LX1670 Programmable Reference / DAC Chip
Setup shown is for 5V application. For 12V input change the following: - Close JP1 and JP4
1
2
3
4
5
6
7
VIDO
V
P
OV
ENABLE
BLKEN
GND
GOOD
SENSE
OUT
LX1670
0.1µF
C10
D4B
V
D4
D3
D2
D1
D0
CC
14
13
12
11
10
9
8
VID4
VID3
VID2
VID1
VID0
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
10K
R2
0.1µF
For Pentium Pro Processor Or Pentium II Processor Applications
C3
0.1µF
P
C7
A
R3
1K
A P P L I C A T I O N I N F O R M A T I O N
R O D U C T I O N
D V A N C E D
390µF
680pF
C4
1K
C8
R4
1
2
3
4
5
6
7
8
P W M C
EN
OT
SGND
V
INV
NINV/SS
HICCUP
C
VREF
T
ADJ
CONTROLLER
LX1661
VRM
D
See Note 1
SYNCEN
A T A
PGND
TDRV
BDRV
O N T R O L L E R
CS+
CS-
V
V
CC
C1
16
15
14
13
12
11
10
9
- Open JP2 and JP3
- For C2 and C11, use 16V/850µF capacitors instead
- Inductor L1 = 10µH
1N4148
1N4148
JP4
S
R7 10
R8 10
D1
D2
C1
390pF
JP3
H E E T
C9
1µF
R5
1K
R6
1K
R13
10
C20
0.1µF
C19
0.1µF
Q1
IRL3103
Q2
IRL3103
See Note 1
16A 32V
TOROID
5µH
F1
L1
SUPPLY OUTPUT CLAMP
1500µF
5m
R1
6.3V
C2
See Note 1
JP1
JP2
1500µF
C5
Q3
2N6504
Copyright © 1998
6.3V
C11
Rev. 1.1
C12
12V
5V
IN
IN
C13
7/98