Data Sheet

ISL85410
4
FN8375.5
July 24, 2014
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Typical Application Schematics
FIGURE 3. INTERNAL DEFAULT PARAMETER SELECTION
FIGURE 4. USER PROGRAMMABLE PARAMETER SELECTION
GND
C
BOOT
100nF
C
FB
R
3
R
2
PHASE
SS
SYNC
BOOT
VIN
PGND
FS
COMP
FB
VCC
PG
EN
C
VCC
1µF
C
VIN
10µF
L
1
22µH
1
2
3
4
5
6
9
10
11
12
C
OUT
10µF
V
OUT
GND
C
BOOT
100nF
C
FB
R
3
R
2
C
SS
C
COMP
R
COMP
R
FS
PHASE
SS
SYNC
BOOT
VIN
PGND
FS
COMP
FB
VCC
PG
EN
C
VIN
10µF
C
VCC
1µF
L
1
22µH
C
OUT
10µF
1
2
3
4
5
6
9
10
11
12
V
OUT
TABLE 1. EXTERNAL COMPONENT SELECTION
V
OUT
(V)
L
1
(µH)
C
OUT
(µF)
R
2
(kΩ)
R
3
(kΩ)
C
FB
(pF)
R
FS
(kΩ)
R
COMP
(kΩ)
C
COMP
(pF)
12 22 2 x 22 90.9 4.75 22 115 150 470
5 22 47 + 22 90.9 12.4 27 DNP (Note 1
) 100 470
3.3 22 47 + 22 90.9 20 27 DNP (Note 1
) 100 470
2.5 22 47 + 22 90.9 28.7 27 DNP (Note 1
) 100 470
1.8 12 47 + 22 90.9 45.5 27 DNP (Note 1
)70 470
NOTE:
1. Connect FS to V
CC
.