Datasheet

LTC3890-1
32
38901fb
TYPICAL APPLICATIONS
High Efficiency Dual 12V/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
PGOOD1
BG1
C
ITH1A
100pF
C
ITH1
470pF
C
SS2
0.01µF
C
SS1
0.01µF
C
ITH2
470pF
C1
1nF
C
OUT1
180µF
R
A1
6.98k
R
ITH1
34.8k
R
B1
100k
R
B2
100k
R
FREQ
41.2k
R
ITH2
20k
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: COILCRAFT SER1360-802KL
L2: COILCRAFT SER1360-472KL
C
OUT1
: 16SVP180MX
C
OUT2
: SANYO 6TPE470M
D1, D2: DFLS1100
D1
D2
LTC3890-1
R
SENSE1
9mΩ
R
SENSE2
10mΩ
L1
8µH
L2
4.7µH
MBOT1
TG1
MTOP1
V
OUT1
12V
3A
V
IN
12.5V TO 60V
38901 TA04
INTV
CC
100k
C
B1
0.47µF
R
A2
18.7k
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
C2
1nF