ltc3853euj Linear Technology Corporation, ltc3853euj Datasheet - Page 31

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

APPLICATIONS INFORMATION
V
OUT1
2.5V
5A
+
M1, M2, M3: Si4816BDY
CHANNEL 1: R
CHANNEL 2: R
CHANNEL 3: R
0.008Ω
5%
43.2k
220μF
4V
10pF
1.5μH
1%
10Ω*
10Ω*
20k
1%
C
ITH1
ITH2
ITH3
P1,2,3
M1
= 18k, C
= 12k, C
= 18k, C
1000pF*
ITH1
ITH2
ITH3
Figure 15. Triple 2.5V/1.8V/3.3V 5A Step-Down Converter with R
= 1500pF, C
= 1500pF, C
= 1500pF, C
R
ITH1,2,3
C
ITH1,2,3
P1
P2
P3
4.7μF
= 220pF
= 220pF
= 220pF
TG1
PGOOD12
PGOOD3
SW1
BG1
MODE/PLLIN
ILIM
SENSE1
SENSE1
V
I
V
SGND
EXTV
TH1,2,3
FB1
FB3
V
IN
CC
+
–
DRV
TK/SS1,2,3
LTC3853
FREQ/PLLFLTR
CC12
*THESE FILTER COMPONENTS NEED TO BE CLOSE TO THE IC
BOOST1,2,3
C
0.1μF
RUN1,2,3
INTV
SENSE2
SENSE2
SENSE3
SENSE3
SS1,2,3
PGND
SW2
V
SW3
CC
BG2
BG3
TG2
TG3
FB2
+
–
+
–
C
B1,2,3
D
3.16k
B1,2,3
10k
0.1μF
SW1,2,3
1000pF*
INTV
CC
1000pF
M2
20k
1%
24.9k
1%
10Ω*
1.5μH
10Ω*
SENSE
+
0.008Ω
5%
, f
220μF
4V
V
1.8V
5A
SW
OUT2
= 500kHz
M3
3853 F15
LTC3853
20k
1%
1000pF*
2.2μH
63.4k
33μF
35V
10Ω*
10Ω*
10pF
1%
+
V
7V TO 24V
IN
31
0.008Ω
5%
220μF
4V
V
3.3V
5A
OUT3
3853f