Datasheet

LTC3855
39
3855f
Typical applicaTions
Figure 23. Triple Phase 1V, 50A Supply with Auxillary 3.3V, 5A Rail, f
SW
= 400kHz
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
13.3k
1nF
20k
SENSE1
–
SENSE1
+
RUN1
ITEMP1 ITEMP2
FREQ
MODE/PLLIN
PHSASMD
CLKOUT
SW1
DIFFN DIFFOUT RUN2 I
LIM1
I
LIM2
PGOOD1 PGOOD2
PGOOD1V
NC SW2 TG2
2k
100Ω
100kRUN1
RUN1
RUN2
100Ω
100k
2.2Ω
4.7µF
0.1µF
0.1µF
LTC3855
10µF
s3
270µF
16V
330pF
4700pF
1nF
CMDSH-3
M4
RJK0330DPB
M3
RJK0305DPB
M2
RJK0330DPB
M1
RJK0305DPB
CMDSH-3
1µF
L1
0.3µH
L2
0.3µH
0.002Ω
1%
0.002Ω
1%
V
IN
4.5V TO
14V
V
OUT1
1V
50A
+
C
OUT1
100µF
6.3V
s3
C
OUT2
470µF
2.5V
s4
+
100Ω100Ω
0.1µF
L1, L2, L3: VITEC 59PR9874
L4: WURTH 744311220
C
OUT1
, C
OUT3
: TDK C3225X5R0J107M
C
OUT2
: KEMET T530D477M2R5ATE006
3855 F23
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
90.9k
0.1µF
20k
SENSE1
–
SENSE1
+
RUN1
ITEMP1 ITEMP2
FREQ
MODE/PLLIN
PHSASMD
CLKOUT
SW1
DIFFN DIFFOUT
RUN2 I
LIM1
I
LIM2
PGOOD1 PGOOD2
PGOOD3.3V
NC SW2 TG2
10k
100Ω
RUN1
100k
100Ω
100k
2.2Ω
4.7µF
0.1µF
0.1µF
LTC3855
100pF0.1µF
3300pF
1nF
CMDSH-3
M7
S4816BDY
M6
RJK0330DPB
M5
RJK0305DPB
CMDSH-3
1µF
L3
0.3µH
0.002Ω
1%
V
OUT2
3.3V
5A
C
OUT3
100µF
6.3V
L4
2.2µH
4.99k
2.49k
10µF