Datasheet

LTC3855
35
3855f
Typical applicaTions
Figure 19. 1.8V, 15A and 1.2V, 15A Supply, f
SW
= 400kHz
L1, L2: VITEC 59PR9875
C
OUT1
, C
OUT3
: MURATA GRM31CR60J107ME39L
C
OUT2
, C
OUT4
: SANYO 2R5TPE330M9
3855 F19
TG1
BOOST1
PGND1
BG1
V
IN
INTV
CC
EXTV
CC
BG2
PGND2
BOOST2
TK/SS1
I
TH1
V
FB1
SGND
V
FB2
I
TH2
TK/SS2
SENSE2
+
SENSE2
DIFFP
20k
1nF
20k
SENSE1
SENSE1
+
RUN1
ITEMP1
ITEMP2
FREQ
MODE/PLLIN
PHSASMD
CLKOUT
SW1
DIFFN
DIFFOUT
RUN2
I
LIM1
I
LIM2
PGOOD1
PGOOD2
PGOOD1
PGOOD2
NC
SW2
TG2
40.2k
100k
100k
100k
20k
2.2Ω
4.7µF
0.1µF
0.1µF
LTC3855
1nF
18k
0.1µF
150pF
10µF
s2
82µF
25V
s2
1.5nF
5.49k
0.1µF
150pF
1nF
CMDSH-3
M4
RJK0330DPB
M3
RJK0305DPB
M2
RJK0330DPB
M1
RJK0305DPB
CMDSH-3
0.1µF
L1
0.4µH
L2
0.4µH
0.002Ω
0.002Ω
V
OUT2
1.2V
15A
V
IN
4.5V TO
20V
V
OUT1
1.8V
15A
+
C
OUT1
100µF
6.3V
C
OUT2
330µF
2.5V
s2
+
C
OUT3
100µF
6.3V
C
OUT4
330µF
2.5V
s2
+
100Ω100Ω
100Ω100Ω