LTC3858-1 Linear Technology Corporation, LTC3858-1 Datasheet - Page 32

• Manufacturer Part Number: LTC3858-1
• Description: Dual 2-Phase Synchronous Step-Down Controller
• Manufacturer: Linear Technology Corporation

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LTC3858-1
TYPICAL APPLICATIONS
32
C
C
C
C
ITH1A
ITH2
R
R
30.1k
75k
ITH1A
ITH2
R
60k
R
R
FREQ
16.9k
75k
A2
R
FREQ
60k
A1
C
A2
680pF
A1
C
ITH1
100pF
680pF
ITH1
100pF
680pF
393k
422k
33pF
15pF
R
R
680pF
C
C
487k
18pF
15pF
392k
R
R
B1
B2
C
C
F1
F2
C
B1
B2
F1
F2
R
R
C
ITH2A
R
R
ITH2A
ITH1
ITH2
ITH1
ITH2
C
C
C
C
1nF
SS1
SS2
1nF
C1
C2
33k
17k
100pF
1nF
SS1
SS2
1nF
C1
46k
17k
100pF
C2
0.01μF
0.01μF
0.01μF
0.01μF
High Effi ciency Dual 12V/5V Step-Down Converter
High Effi ciency Dual 24V/5V Step-Down Converter
SENSE1
SENSE1
V
I
SS1
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
SS2
I
V
SENSE2
SENSE2
TH1
TH2
SENSE1
SENSE1
V
I
SS1
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
SS2
I
V
SENSE2
SENSE2
FB1
FB2
TH1
TH2
FB1
FB2
CC
CC
LTC3858-1
LTC3858-1
+
–
–
+
+
–
–
+
PGOOD1
BOOST1
BOOST2
PGOOD1
INTV
BOOST1
BOOST2
PGND
INTV
PGND
SW1
SW2
BG1
TG1
BG2
TG2
SW1
V
SW2
BG1
TG1
TG2
BG2
CC
V
IN
CC
IN
C
C
L1: SUMIDA CDEP105-8R8M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
100k
OUT1
OUT2
100k
C
L1: SUMIDA CDRH105R-220M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
OUT2
INTV
INTV
: KEMET T525D476M016E035
: SANYO 10TPD150M
: SANYO 10TPD150M
D1
D2
CC
D1
D2
CC
C
0.47μF
C
0.47μF
C
0.47μF
C
0.47μF
B1
B2
B1
B2
C
4.7μF
C
4.7μF
INT
INT
MBOT1
MTOP1
MTOP2
MBOT2
MBOT1
MTOP1
MTOP2
MBOT2
C
22μF
IN
C
22μF
8.8μH
4.3μH
IN
L1
L2
4.3μH
22μH
L1
L2
V
12.5V TO 38V
IN
V
4V TO 38V
IN
R
R
10mΩ
SENSE1
SENSE2
7mΩ
R
R
25mΩ
38581 TA02a
SENSE1
SENSE2
7mΩ
38581 TA04
C
47μF
C
150μF
OUT1
C
22μF
25V
CERAMIC
OUT2
C
150μF
OUT1
2
OUT2
V
5V
5.5A
V
12V
3A
OUT2
OUT1
V
24V
1A
V
5V
5A
OUT1
OUT2
38581f