LTC3855_15 Datasheet, PDF (37/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense

Typical Applications
0.1µF
0.1µF
20k
330pF
20k
3300pF
10k ^0.1µF
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
100k
PGOOD
LTC3855
10µF
s4
M1
RJK0305DPB
3.92k
L1
0.47µH
+ _270µF
16V
V_IN
4.5V TO
14V
M2
RJK0330DPB
s2
C_OUT1
100µF
+
C_OUT2
330µF
V_OUT
1.2V
40A
6.3V
2.5V
s4
s4
M3
RJK0305DPB
L2
0.47µH
M4
RJK0330DPB
s2
3.92k
L1, L2: VISHAY IHLP5050FD-01, 0.47µH
C_OUT1: MURATA GRM31CR60J107ME39L
C_OUT2: SANYO 2R5TPE330M9
3855 F21
Figure 21. High Efficiency Dual Phase 1.2V, 40A Supply with DCR Sensing, f_SW = 250kHz
3855f
37