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| LTC3855_15 Datasheet, PDF (36/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense | |||
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LTC3855
Typical Applications
100Ω 1nF 100Ω
RUN
250kHz
0.1µF
20k
100pF
20k
2200pF
5.9k 1nF
TK/SS1
ITH1
VFB1
SGND
VFB2
ITH2
TK/SS2
SENSE2+
SENSE2â
DIFFP
LTC3855
TG1
BOOST1
PGND1
BG1
VIN
INTVCC
EXTVCC
BG2
PGND2
BOOST2
0.1µF
CMDSH-3
2.2Ω
4.7µF
0.1µF
0.1µF CMDSH-3
100Ω
100Ω
RUN
100k
PGOOD
10µF
+
s4
M1
RJK0305DPB
0.001Ω
1%
L1
0.44µH
270µF
16V
VIN
4.5V TO
14V
M2
RJK0330DPB
s2
COUT1
100µF
+
COUT2
330µF
VOUT
1.2V
40A
6.3V
2.5V
s4
s4
M3
RJK0305DPB
L2
0.44µH
M4
RJK0330DPB
s2
0.001Ω
1%
L1, L2: PULSE PA0513.441NLT
COUT1: MURATA GRM31CR60J107ME39L
COUT2: SANYO 2R5TPE330M9
3855 F20
Figure 20. High Efficiency Dual Phase 1.2V, 40A Supply, fSW = 250kHz
3855f
36
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