Datasheet

19
LTC1625
APPLICATIONS INFORMATION
WUU
U
+
+
C
SS
OPTIONAL 5V EXTV
CC

CONNECTION
M1
M2
D1
C
VCC
BOLD LINES INDICATE HIGH CURRENT PATHS
1625 F10
C
IN
C
OUT
V
IN
V
OUT
OPEN
OPEN
EXT
CLK
R1
OUTPUT DIVIDER 
REQUIRED
WITH V
PROG
OPEN
R2
C
C1
R
C
C
B
D
B
+
L1
+
+
–
–
V
IN
TK
EXTV
CC
LTC1625
SYNC
V
PROG
SW
TG
BOOST
INTV
CC
BG
RUN/SS
FCB
I
TH
SGND
V
OSENSE
PGND
2
1
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Figure 10. LTC1625 Layout Diagram
TYPICAL APPLICATIONS
U
+
C
SS
0.1µF
R
C
10k
C
C
330pF
C
IN

15µF
35V
V
IN

5V TO 28V
V
OUT

5V
1.2A
M2
1/2 Si9936DY
M1
1/2 Si9936DY
C
VCC
4.7µF
1625 TA02
OPEN
INTV
CC
C
B 
0.1µF
D
B 
CMDSH-3
L1
39µH
C
IN
: AVX TPSD156M035R0300
C
OUT
: AVX TPSD107M010R0100
L1: SUMIDA CD104-390MC
+
C
OUT

100µF
10V
0.100Ω
+
V
IN
TK
EXTV
CC
LTC1625
SYNC
V
PROG
SW
TG
BOOST
INTV
CC
BG
RUN/SS
FCB
I
TH
SGND
V
OSENSE
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
5V/1.2A Fixed Output at 225kHz