LTC3811_15 Datasheet, PDF (45/48 Pages) Linear Technology – High Speed Dual, Multiphase Step-Down DC/DC Controller

LTC3811
TYPICAL APPLICATIONS
AUX 5V GATE
1μF
DRIVE SUPPLY
1.0Ω
OUTPUT 1
ON/OFF
CONTROL
TO SUPPLY
MONITOR
5nF
100k
EXTV_CC V_IN INTV_CC DRV_CC
PGOOD1
BOOST1
PGOOD2
TG1
SS/TRACK1
SW1
7.5k
1%
4.99k
1%
33pF
100pF
285k
SS/TRACK2
BG1
RNG1
RNG2
LTC3811
MODE/SYNC
PHASEMODE
PGND
SENSE1⁺
SENSE1^–
BOOST2
FB2
TG2
PLL/LPF
SW2
CLKOUT
RUN1
RUN2
BG2
CSOUT
SENSE2⁺
SENSE2^–
FB1
COMP1
COMP2
SGND
DIFF/IN⁺
DIFF/IN^–
DIFF/OUT
BAT54
0.33μF
BAT54
10μF
X5R
47μF
X5R
470μF
RJK0305DPB
0.4μH 0.0015Ω
RJK0301DPB
50Ω
2200pF
50Ω
50Ω
2200pF
50Ω
0.33μF
RJK0305DPB
0.4μH
0.0015Ω
RJK0301DPB
200μF
X5R
V_IN
12V
2000μF
V_OUT1
1.5V
45A
100pF
AUX 5V GATE
1μF
DRIVE SUPPLY
1.0Ω
TO SUPPLY
MONITOR
5nF
10nF
10k
100k
EXTV_CC V_IN INTV_CC DRV_CC
PGOOD2
BOOST1
PGOOD1
TG1
RNG1
SW1
RNG2
FB1
LTC3811
BG1
PGND
PHASEMODE
SS/TRACK2
SS/TRACK1
SENSE1⁺
SENSE1^–
BOOST2
CLKOUT
TG2
PLL/LPF
SW2
MODE/SYNC
BG2
RUN1
COMP1
RUN2
CSOUT
SENSE2⁺
SENSE2^–
22.6k
1%
4.99k
33pF
100pF
28.5k
FB2
COMP2
SGND
DIFF/OUT
DIFF/IN⁺
DIFF/IN^–
BAT54
0.33μF
BAT54
10μF
X5R
22μF
X5R
RJK0305DPB
0.4μH 0.0015Ω
RJK0301DPB
50Ω
2200pF
50Ω
50Ω
2200pF
50Ω
0.1μF
RJK0305DPB
0.4μH 0.0015Ω
RJK0301DPB
100μF
22μF
X5R
V_OUT2
3.3V
5A
Figure 31. 3-Phase, 12V Input, 1.5V/45A Output with a 3.3V/5A Auxiliary Output
3811f
45