Datasheet

LTC3855
37
3855f
Figure 21. High Efficiency Dual Phase 1.2V, 40A Supply with DCR Sensing, f
SW
= 250kHz
L1, L2: VISHAY IHLP5050FD-01, 0.47µH
C
OUT1
: MURATA GRM31CR60J107ME39L
C
OUT2
: SANYO 2R5TPE330M9
3855 F21
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
0.1µF
20k
SENSE1
–
SENSE1
+
RUN1
ITEMP1 ITEMP2
FREQ
MODE/PLLIN
PHSASMD
CLKOUT
SW1
DIFFN DIFFOUT RUN2 I
LIM1
I
LIM2
PGOOD1 PGOOD2
PGOOD
NC SW2 TG2
10k
100k
2.2Ω
4.7µF
0.1µF
0.1µF
LTC3855
10µF
s4
270µF
16V
330pF
3300pF
0.1µF
CMDSH-3
M4
RJK0330DPB
s2
M3
RJK0305DPB
M2
RJK0330DPB
s2
M1
RJK0305DPB
CMDSH-3
1µF
L1
0.47µH
L2
0.47µH
3.92k
3.92k
V
IN
4.5V TO
14V
V
OUT
1.2V
40A
+
C
OUT1
100µF
6.3V
s4
C
OUT2
330µF
2.5V
s4
+
0.1µF
Typical applicaTions