Linear Technology 1315, Quick Start Manual

Page: 4 / 5

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1315
DUAL STEP-DOWN 1.5A LED DRIVER
4
2
3
V
U
1
L
T
3
4
7
5
E
F
E
-1
6
5
16
21
2
0 3 1 4 2
1
7
1
9
18
1
1
8 1
0
7 9 1
2
13
15
14
VIN
VIN
SH DN
GN D
P
W
M
1
B
O
O
S
T1
O
U
T1
S
W
1
L
E
D
1
R
E
F
V
A
D
J
1 VC 1
P
W
M
2
B
O
O
S
T2
O
U
T2
S
W
2
L
E
D
2
V
A
D
J
2
VC 2
GN D
RT
E
2
V
IN
L
1
4
7
u
H
E
1
1
L
E
D
2
-
Q
3
O
P
T
2
N
7
0
0
2
R
1
3
1
.0
M
O
P
T
E
5
P
W
M
2
E
1
S
H
D
N
D
1
1
N
4
4
4
8
W
C
7
2
2
0
p
F
O
P
T
R
1
9
1
k
1
%
U
P
T
O
3
6
V
D
2
1
N
4
4
4
8
W
E
7
G
N
D
C
4
0
.1
u
F
C
2
0
.2
2
u
F
2
5
V
D
8
2
2
V
Q
2
O
P
T
S
i2
3
1
8
D
S
1
.5
A
D
6
9
.1
V
C
O
U
T
1
2
.2
u
F
5
0
V
V
C
2
Q
4
M
M
B
T
3
9
0
4
1
3 2
R
1
8
1
0
0
k
R
9
O
P
T
2
3
V
R
E
F
6
0
0
kH
z
R
5
O
P
T
R
6
O
P
T
R
1
5
1
0
0
k
R
1
6
1
0
k
V
C
1
R
3
0
E
8
L
E
D
1
-
E
3
G
N
D
E
X
T
E
N
D
E
D
D
IM
M
IN
G
R
A
N
G
E
Q
1
O
P
T
S
i2
3
1
8
D
S
R
1
4
O
P
T
Q
5
F
M
M
T
3
9
0
4
1
3 2
O
P
T
IO
N
A
L
D
5
9
.1
V
D
3
B
2
4
0
A
R
2
0
C
O
U
T
2
2
.2
u
F
5
0
V
V
C
2
R
2
0
1
k
1
%
E
6
G
N
D
V
C
1
D
4
B
2
4
0
A
R
4
O
P
T
C
IN
1
4
.7
u
F
5
0
V
R
1
7
1
0
k
D
7
2
2
V
E
1
0
L
E
D
2
+
U
P
T
O
1
.5
A
R
7
O
P
T
L
2
4
7
u
H
U
P
T
O
R
1
2
2
4
.3
k
1
%
E
4
P
W
M
1
R
8
O
P
T
C
3
0
.1
u
F
R
E
F
E
9
L
E
D
1
+
R
1
2
0
k
C
1
0
.2
2
u
F
2
5
V