LTC3890
Typical applicaTions
High Efficiency Dual 24V/5V Step-Down Converter
R
B1
487k
+
SENSE1
INTV
CC
C1
1nF
C
33pF
F1
100k
100k
–
SENSE1
PGOOD1
PGOOD2
BG1
R
A1
16.9k
V
FB1
C
100pF
R
ITH1A
L1
22µH
MBOT1
MTOP1
R
SENSE1
V
24V
1A
25mΩ
OUT1
C
680pF
ITH1
46k
ITH1
SW1
BOOST1
ITH1
C
OUT1
22µF
C
LTC3890
TRACK/SS1
C
SS1
0.01µF
B1
×2 CERAMIC
0.47µF
TG1
D1
I
LIM
V
IN
PHSMD
CLKOUT
PLLIN/MODE
V
IN
28V TO 60V
C
IN
220µF
INTV
CC
C
INT
SGND
4.7µF
PGND
EXTV
CC
RUN1
RUN2
FREQ
R
FREQ
D2
60k
TG2
MTOP2
C
0.47µF
C
SS2
0.01µF
R
B2
L2
4.7µH
R
BOOST2
SW2
SENSE2
TRACK/SS2
ITH2
10mΩ
V
C
470pF
ITH2
20k
OUT2
5V
5A
ITH2
C
OUT2
MBOT2
BG2
470µF
R
A2
18.7k
V
FB2
R
B2
100k
–
+
SENSE2
SENSE2
C2
1nF
3890 TA05
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: SUMIDA CDR7D43MN
L2: COILCRAFT SER1360-472KL
C
: KEMET T525D476MO16E035
: SANYO 6TPE470M
OUT1
OUT2
C
D1, D2: DFLS1100
3890fb
35
Linear Systems [ Linear Systems ]
