Datasheet

LTC3890-1
33
38901fb
TYPICAL APPLICATIONS
High Efficiency Dual 24V/5V Step-Down Converter
MTOP2
SENSE1
+
SENSE1
–
V
FB1
TRACK/SS2
ITH2
V
FB2
SENSE2
–
SENSE2
+
ITH1
TRACK/SS1
PLLIN/MODE
SGND
EXTV
CC
RUN1
RUN2
FREQ
BG1
C
ITH1A
100pF
C
ITH1
680pF
C
SS2
0.01µF
C
SS1
0.01µF
C
ITH2
470pF
C1
1nF
C
OUT1
22µF
×2 CERAMIC
R
B1
487k
R
A1
16.9k
C
F1
33pF
R
ITH1
46k
R
FREQ
60k
R
ITH2
20k
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: SUMIDA CDR7D43MN
L2: COILCRAFT SER1360-472KL
C
OUT1
: KEMET T525D476MO16E035
C
OUT2
: SANYO 6TPE470M
D1, D2: DFLS1100
D1
D2
LTC3890-1
L1
22µH
L2
4.7µH
MBOT1
TG1
MTOP1
V
OUT1
24V
1A
V
IN
28V TO 60V
38901 TA05
INTV
CC
PGOOD1
100k
C
B1
0.47µF
R
A2
18.7k
R
B2
100k
C2
1nF
SW1
V
OUT2
5V
5A
SW2
BOOST1
C
B2
0.47µF
BOOST2
V
IN
INTV
CC
PGND
TG2
BG2
C
OUT2
470µF
C
INT
4.7µF
C
IN
220µF
MBOT2
R
SENSE1
25mΩ
R
SENSE2
10mΩ