Application Note 1946
8
AN
194
6
.0
Ju
ly
7, 2
01
4
Submi
t D
ocument
Feedba
ck
ISL78268EVAL1Z Schematic
FIGURE 4. SCHEMATIC
+12V
6800pF
VCC
CLKOUT
PHASE
24
3
42
2
42
2
GND
VIN
VIN
GND
VIN
VIN
LG
UG
0
ISE
N
2N
ISE
N
2P
24
3
IS
EN1N
42
2
2
43
ISEN
1
P
42
2
2
43
130k
10k
100pF
100pF
100pF
100pF
220pF
220pF
10
µF
10
µF
VOUT
GND
GND
GND
GND
PGOOD
PVCC
VOUT
28
k
1
82
k
22
0µ
F
VCC
0.1µF
VOUT
0.005
PGOOD
COMP
LG
BOOT
0.005
VCC
PLL_COMP
VCC
DNP
100
pF
10
k
100
k
DNP
4.7µH
SS
FSY
N
C
EN
GND
PVCC
PHASE
UG
ISEN
1
N
ISEN
2
N
ISEN
2
P
ISEN
1
P
ISL78268ARZ
40
.2
k
DNP
OP
EN
10k
0.022µF
4.
7µ
F
10
00
p
F
68
00pF
3.
2
4
k
27.4k
0.22µF
0
.02
2µ
F
1µ
F
DNP
OPE
N
0.1µF
1µ
F
10
0V
1µ
F
0.
1
µ
F
0.
1
µ
F
10
BAT4
6
W
-V
68
µF
DNP
10
µF
DNP
10
k
DNP
0
0.01µF
100pF
15
HIC/LATCH
HIC/LATCH
IMON/DE
FB
DNP
AON6246
AON6246
DNP
OUT
OUT
OUT
OUT
4
4
3
2
1
2
1
2
1
2
1
2
1
2
3
2
1
4
8
7
6
5
25
1
4
5
6
13
14
15
16
17
18
3
2
1
2
1
2
1
2
5
6
7
8
1
2
3
4
VI
N
IS
EN
1
N
IS
EN1
P
IS
EN
2
N
IS
EN2
P
VC
C
CL
KOUT
EN
SG
N
D
F
SYN
C
HIC/
L
A
T
C
H
P
LLC
OM
P
J3
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
BOOT
UG
PH
LG
PVCC
PGND
PGOOD
SS
COMP
FB
SLOPE
EP
IMON/DE
E
E
E
E
E
E
E
E
E
E
E
E
E
E
7
3 2
1
8
6
5
12
7
2
1
2
1
21
21
3
1
3
1
8
9
10
11
12
19
20
22
23
24
21
12
12
12
12
12
1
2
12
21
12
12
12
12
1
2
1
2
2
1
4
1
3
8
6
7
2
5
J1
5
R
26
E
E
C7
R10
J27
J26
C12
R11
C10
R16
R4
R5
C9
R
28
J4
J23
R
2
R
1
R
7
R
6
C
1
C
2
C
11
J10
J1
3
R
20
R
23
C
28
J2
2
J1
6
J9
D1
J1
7
J1
2
C
3
C
6
J2
0
J2
4
J1
9
J1
4
C
23
R
22
C
5
C
32
R
19
C
17
C2
0
C2
2
C
4
R
3
R
18
C
29
C
31
C
26
C
30
R
25
R
29
R
24
R
15
R
8
R
9
R
17
C
15
J2
1
J2
8
J5
C
8
R27
R12
C14
C25
L1
L2
J8
J6
J11
C24
C27
C13
C16
R14
J18
C18
R21
C21
R13
C19
J7
Q1
Q2
Q4
Q3
U1
+
+
+
+
2
