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| LTC3855_15 Datasheet, PDF (35/44 Pages) Linear Technology – Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense | |||
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Typical Applications
LTC3855
0.1µF
100Ω 1nF 100Ω
100k
40.2k
18k 1nF
20k
150pF
150pF
20k
5.49k 1.5nF
1nF
0.1µF
100Ω 100Ω 20k
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
100k
PGOOD1
PGOOD2
100k
10µF
s2
M1
RJK0305DPB
0.002Ω
L1
0.4µH
M2
RJK0330DPB
+ 82µF
25V
s2
VIN
4.5V TO
20V
COUT1 +
100µF
6.3V
COUT2
330µF
2.5V
s2
VOUT1
1.8V
15A
M3
RJK0305DPB
L2
0.4µH
M4
RJK0330DPB
0.002Ω
COUT3 +
100µF
6.3V
COUT4
330µF
2.5V
s2
VOUT2
1.2V
15A
L1, L2: VITEC 59PR9875
COUT1, COUT3: MURATA GRM31CR60J107ME39L
COUT2, COUT4: SANYO 2R5TPE330M9
3855 F19
Figure 19. 1.8V, 15A and 1.2V, 15A Supply, fSW = 400kHz
3855f
35
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