LTC3855_15 Datasheet, PDF (39/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense

Typical Applications
LTC3855
100Ω 1nF 100Ω
RUN1 100k
0.1µF
13.3k
20k
4700pF
330pF
2k ^1nF
TK/SS1
I_TH1
V_FB1
SGND
V_FB2
I_TH2
TK/SS2
SENSE2⁺
SENSE2^–
DIFFP
LTC3855
TG1
BOOST1
PGND1
BG1
V_IN
INTV_CC
EXTV_CC
BG2
PGND2
BOOST2
0.1µF
CMDSH-3
2.2Ω
4.7µF
1µF
0.1µF ^CMDSH-3
100Ω
100Ω
RUN1
PGOOD1V
100k
10µF
+
s3
M1
RJK0305DPB
L1
0.3µH
0.002Ω
1%
V_IN
4.5V TO
270µF _14V
16V
M2
RJK0330DPB
M3
RJK0305DPB
L2
0.3µH
0.002Ω
1%
M4
RJK0330DPB
C_OUT1
100µF
+
C_OUT2
470µF
V_OUT1
1V
50A
6.3V
2.5V
s3
s4
90.9k
20k
0.1µF
3300pF
100pF
10k ^0.1µF
100Ω 1nF 100Ω
100k
RUN1
TK/SS1
I_TH1
V_FB1
SGND
V_FB2
I_TH2
TK/SS2
SENSE2⁺
SENSE2^–
DIFFP
LTC3855
TG1
BOOST1
PGND1
BG1
V_IN
INTV_CC
EXTV_CC
BG2
PGND2
BOOST2
0.1µF
CMDSH-3
2.2Ω
4.7µF
1µF
M5
RJK0305DPB
L3
0.3µH
0.002Ω
1%
M6
RJK0330DPB
10µF
RUN2
PGOOD3.3V
0.1µF ^CMDSH-3
100k
M7
S4816BDY
L4
2.2µH
2.49k
4.99k
L1, L2, L3: VITEC 59PR9874
L4: WURTH 744311220
C_OUT1, C_OUT3: TDK C3225X5R0J107M
C_OUT2: KEMET T530D477M2R5ATE006
Figure 23. Triple Phase 1V, 50A Supply with Auxillary 3.3V, 5A Rail, f_SW = 400kHz
C_OUT3
100µF
6.3V
V_OUT2
3.3V
5A
3855 F23
3855f
39