LTC3858 Linear Technology, LTC3858 Datasheet - Page 32

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

LTC3858
Typical applicaTions

C
C
ITH1
ITH2
R
R
75k
30.1k
R
60k
FREQ
A2
A1
C
680pF
680pF
ITH1A
393k
422k
33pF
15pF
R
R
C
100pF
C
B2
B1
F1
F2
C
C
R
R
ITH2A
SS1
ITH1
ITH2
C
1nF
1nF
0.01µF
SS2
C1
C2
33k
17k
100pF
0.01µF
V
I
SS1
I
PHSMD
CLKOUT
PLLIN/MODE
SGND
I
SENSE1
SENSE1
EXTV
RUN1
RUN2
FREQ
SS2
V
SENSE2
SENSE2
TH1
LIM
TH2
FB1
FB2
High Efficiency Dual 12V/5V Step-Down Converter
CC
LTC3858
+
–
–
+
PGOOD2
PGOOD1
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
BG2
TG2
V
CC
IN
C
C
L1: SUMIDA CDEP105-8R8M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
100k INTV
100k
OUT1
OUT2
: KEMET T525D476M016E035
: SANYO 10TPD150M
D1
D2
CC
C
0.47µF
C
0.47µF
B1
B2
C
4.7µF
INT
MBOT1
MTOP1
MTOP2
MBOT2
C
22µF
IN
8.8µH
4.3µH
L1
L2
V
12.5V TO 38V
IN
R
R
10m
SENSE1
SENSE2
7m
3858 TA02a
www.DataSheet4U.com
C
47µF
C
150µF
OUT1
OUT2
V
12V
3A
V
5V
5A
OUT2
OUT1
3858fa