ltc3853euj Linear Technology Corporation, ltc3853euj Datasheet - Page 32

• Manufacturer Part Number: ltc3853euj
• Description: Triple Output, Multiphase Synchronous Step-down Controller
• Manufacturer: Linear Technology Corporation

LTC3853
TYPICAL APPLICATIONS
V
32
V
OUT1
1.8V
OUT1
3.3V
15A
5A
+
+
M1, M3, M5: RJK0305DPB
M2, M4, M6: RJK0301DPB
CHANNEL 1: R
CHANNEL 2: R
CHANNEL 3: R
M1, M2, M3: Si4816BDY
CHANNEL 1: R
CHANNEL 2: R
CHANNEL 3: R
0.002Ω
5%
0.008Ω
5%
0.56μH
24.9k
660μF
2.5V
22pF
63.4k
220μF
4V
10pF
3.3μH
1%
1%
100Ω*
100Ω*
10Ω*
10Ω*
20k
1%
20k
1%
C
ITH1
ITH2
ITH3
ITH1
ITH2
ITH3
C
P1,2,3
P1,2,3
= 15k, C
= 10k, C
= 13k, C
M1
= 18k, C
= 18k, C
= 43k, C
M1
M2
Triple 1.8V/1.2V/2.5V, 15A High Current Step-Down Converter with R
1000pF*
ITH1
ITH2
ITH3
1000pF*
ITH1
ITH2
ITH3
Triple 3.3V/2.5V/12V, 5A Step-Down Converter with R
= 1500pF, C
= 1500pF, C
= 1500pF, C
= 1500pF, C
= 1500pF, C
= 470pF, C
R
R
ITH1,2,3
ITH1,2,3
C
C
ITH1,2,3
ITH1,2,3
400kHz
PLLIN
P3
P1
P2
P3
P1
P2
4.7μF
4.7μF
= 330pF
= 330pF
= 220pF
= 330pF
= 220pF
= 220pF
TG1
PGOOD12
PGOOD3
SW1
BG1
MODE/PLLIN
ILIM
SENSE1
SENSE1
V
I
V
SGND
EXTV
TG1
PGOOD12
PGOOD3
SW1
BG1
ILIM
SENSE1
MODE/PLLIN
SENSE1
V
I
V
SGND
EXTV
TH1,2,3
TH1,2,3
FB1
FB3
FB1
FB3
V
V
IN
IN
CC
CC
+
–
DRV
DRV
+
–
TK/SS1,2,3
TK/SS1,2,3
LTC3853
*THESE FILTER COMPONENTS NEED TO BE CLOSE TO THE IC
LTC3853
FREQ/PLLFLTR
FREQ/PLLFLTR
CC12
CC12
*THESE FILTER COMPONENTS NEED TO BE CLOSE TO THE IC
BOOST1,2,3
BOOST1,2,3
C
0.1μF
C
0.1μF
RUN1,2,3
RUN1,2,3
INTV
SENSE2
SENSE2
SENSE3
SENSE3
INTV
SENSE2
SENSE2
SENSE3
SENSE3
SS1,2,3
SS1,2,3
PGND
PGND
SW2
SW3
V
SW2
V
SW3
CC
TG2
BG2
TG3
BG3
CC
BG2
BG3
TG2
TG3
FB2
FB2
+
–
+
–
+
–
+
–
C
C
B1,2,3
B1,2,3
D
D
2.55k
10k
B1,2,3
B1,2,3
10k
10nF
0.1μF
0.1μF
SW1,2,3
SW1,2,3
1000pF*
1000pF*
INTV
CC
1000pF
1000pF
SENSE
M3
M4
M2
20k
1%
20k
1%
43.2k
10k
1%
1%
Synchronized at 400kHz
100Ω*
10Ω*
0.47μH
100Ω*
47pF
2.2μH
10Ω*
10pF
SENSE
+
+
0.002Ω
5%
0.008Ω
5%
660μF
2.5V
220μF
4V
V
1.2V
15A
V
2.5V
5A
, f
OUT2
OUT2
SW
= 400kHz
M5
M6
M3
3853 TA03
3853 TA02
20k
1%
10k
1%
0.78μH
1000pF*
1000pF*
100Ω*
100Ω*
6.8μH
43.2k
180μF
16V
33μF
35V
10Ω*
10Ω*
140k
22pF
1%
1%
+
+
V
6.5V TO 14V
V
13V TO 24V
IN
IN
0.002Ω
5%
0.011Ω
5%
660μF
4V
220μF
16V
V
2.5V
15A
3853f
V
12V
4A
OUT3
OUT3