Datasheet

LTC3838
48
3838fa
TYPICAL APPLICATIONS
Figure 18. 4.5V to 14V Input, 1.2V/50A 2-Phase Single Output, 300kHz, DCR Sense, DTR Enabled, Step-Down Converter
LOAD CURRENT (A)
0.1
50
EFFICIENCY (%)
POWER LOSS (W)
80
90
100
110
3838 F18b
70
60
0
6
8
10
4
2
FORCED CONTINUOUS MODE
DISCONTINUOUS MODE
V
IN
= 12V
V
OUT
= 1.2V
EFFICIENCY
POWER
LOSS
LOAD CURRENT (A)
0.1
50
EFFICIENCY (%)
POWER LOSS (W)
80
90
100
110
3838 F18c
70
60
0
6
8
10
4
2
FORCED CONTINUOUS MODE
DISCONTINUOUS MODE
V
IN
= 5V
V
OUT
= 1.2V
EFFICIENCY
POWER
LOSS
3838 F18
0.1µF
0.1µF
L2
0.36µH
L1
0.36µH
C
OUT4
100µF
w2
C
OUT3
330µF
w2
DB2
MT2
MB2
2.55k
+
LTC3838
2.2
2.2
10k
100k
35.7k
41.2k
137k
V
IN
1µF
0.1µF
4.7µF
0.1µF
0.01µF
47pF
470pF
C
OUT2
330µF
w2
C
OUT1
100µF
w2
V
OUT
1.2V
50A
V
IN
4.5V TO 14V
10k
SENSE1
–
SENSE1
+
BOOST1
TG1
SW1
SENSE2
+
BOOST2
TG2
SW2
DRV
CC1
INTV
CC
DRV
CC2
EXTV
CC
DB1
SENSE2
–
BG1 BG2
V
FB2
PGND
V
OUTSENSE1
+
V
OUTSENSE1
–
PGOOD1 PGOOD2
TRACK/SS1
ITH1
DTR1
V
RNG1
TRACK/SS2
ITH2
DTR2
PHASMD
MODE/PLLIN
CLKOUT
RUN2
V
RNG2
SGND
RUN1
RT
PGOOD
MB1
MT1
1µF
C
IN2
22µF
w4
+
C
IN1
180µF
+
2.55k
C
IN1
: SANYO 16SVP180MX
C
IN2
: TDK C3225X5R1C226MT
C
OUT1
, C
OUT4
: MURATA GRM31CR60J107ME39L
C
OUT2
, C
OUT3
: SANYO 2R5TPE330M9
DB1, DB2: CENTRAL SEMI CMDSH-4ETR
L1, L2: VISHAY IHLP4040DZERR36M01
MT1, MT2: INFINEON BSC050NE2LS
MB1, MB2: INFINEON BSC010NE2LS