LTC1435
APPLICATIONS INFORMATION
U
W U U
+
C
M1
OSC
1
2
16
15
C
IN
C
TG
OSC
C
SS
RUN/SS
BOOST
V
C
IN
C1
R
C
3
14
I
SW
TH
C
B
0.1µF
C
4
5
13
12
C2
LTC1435
D
D1
SFB
V
B
IN
SGND
INTV
CC
–
–
100pF
+
M2
6
7
11
10
4.7µF
BG
V
OSENSE
–
SENSE
PGND
1000pF
8
9
+
SENSE
EXTV
CC
L1
R1
C
OUT
+
V
OUT
R
SENSE
R2
BOLD LINES INDICATE
HIGH CURRENT PATHS
+
LTC1435 • F08
Figure 8. LTC1435 Layout Diagram
U
TYPICAL APPLICATIONS
Dual Output 5V and Synchronous 12V Application
V
IN
5.4V TO 28V
C
IN
0.01µF
C
OSC
68pF
+
22µF
35V
× 2
IRLL014
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
M1
C
TG
BOOST
SW
OSC
Si4412DY
4.7k
C
SS
0.1µF
RUN/SS
R
C
C
C1
10k
470pF
I
TH
T1
C
C2
51pF
C
SEC
+
10µH
3.3µF
SFB
V
IN
1:1.42
35V
LTC1435
R
SENSE
0.033Ω
0.1µF
CMDSH-3
V
OUT
5V/3.5A
SGND
INTV
CC
+
100pF
R1
35.7k
1%
4.7µF
V
BG
OSENSE
M2
Si4412DY
C
MBRS140T3
OUT
+
100µF
–
10V
× 2
SENSE
SENSE
PGND
R2
20k
1%
1000pF
+
EXTV
CC
100Ω
100Ω
SGND
V
OUT2
12V
LTC1435 • TA04
11.3k
1%
100k
1%
T1: DALE LPE6562-A236
120mA
16
Linear [ Linear ]
