LTC3858 Linear Technology, LTC3858 Datasheet - Page 33

• Manufacturer Part Number: LTC3858
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

Typical applicaTions
C
C
ITH1A
ITH2
R
R
75k
16.9k
R
60k
FREQ
A2
A1
C
680pF
ITH1
100pF
680pF
392k
487k
18pF
15pF
R
R
C
C
B1
B2
F1
F2
C
R
R
ITH2A
ITH1
ITH2
C
C
1nF
1nF
SS1
SS2
C1
100pF
C2
46k
17k
0.01µF
0.01µF
SENSE1
SENSE1
V
I
SS1
I
PHSMD
CLKOUT
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
SS2
I
V
SENSE2
SENSE2
TH1
LIM
TH2
FB1
FB2
High Efficiency Dual 24V/5V Step-Down Converter
CC
LTC3858
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
TG2
BG2
V
CC
IN
C
L1: SUMIDA CDRH105R-220M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
100k
100k
OUT2
: SANYO 10TPD150M
INTV
D1
D2
CC
C
0.47µF
C
0.47µF
B1
B2
C
4.7µF
INT
MBOT1
MTOP1
MTOP2
MBOT2
C
22µF
IN
4.3µH
22µH
L1
L2
V
28V TO 38V
IN
R
R
25m
SENSE1
SENSE2
7m
3858 TA04
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C
22µF
CERAMIC
C
150µF
OUT1
2
OUT2
LTC3858
V
5V
5A
V
24V
1A
OUT2
OUT1

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