Datasheet

LTC3868-1
32
38681fd
TYPICAL APPLICATIONS
High Effi ciency Dual 12V/5V Step-Down Converter
SENSE1
+
SENSE1
–
SENSE2
–
SENSE2
+
V
FB1
I
TH1
SGND
EXTV
CC
RUN1
RUN2
FREQ
SS2
V
FB2
SS1
PLLIN/MODE
PGOOD1
BG1
SW1
BOOST1
TG1
V
IN
INTV
CC
PGND
TG2
BG2
BOOST2
SW2
C1
1nF
R
B1
422k
C
OUT1
: KEMET T525D476M016E035
C
OUT2
: SANYO 10TPD150M
L1: SUMIDA CDEP105-8R8M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
C
F1
33pF
C
ITH1A
100pF
C
SS1
0.01µF
C
SS2
0.01µF
C
ITH1
680pF
C
INT
4.7µF
C
B1
0.47µF
C
B2
0.47µF
D1
V
IN
12.5V TO 24V
D2
LTC3868-1
L1
8.8µH
L2
4.3µH
R
SENSE1
10m
R
SENSE2
7m
MBOT1
MTOP2
MTOP1
MBOT2
38681 TA02a
100k
INTV
CC
C
OUT1
47µF
V
OUT1
12V
3A
V
OUT2
5V
5.5A
C
IN
22µF
C
OUT2
150µF
R
A1
34k
R
A2
75k
R
B2
393k
C
F2
15pF
R
FREQ
60k
R
ITH1
33k
C2
1nF
I
TH2
C
ITH2
680pF
C
ITH2A
100pF
R
ITH2
17k