Datasheet
LTC3839
45
3839fa
TYPICAL APPLICATIONS
Figure 18. 4.5V to 14V Input, 1.2V/50A Output, 300kHz, DCR Sense, DTR Enabled, Step-Down Converter
3839 F18a
0.1µF
0.1µF
L2
0.33µH
L1
0.33µH
C
OUT4
100µF
w2
C
OUT3
330µF
w2
DB2
MT2
MB2
2.55k
+
LTC3839
2.2
2.2
10k
100k
41.2k
47.5k
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
PGND
V
OUTSENSE
+
V
OUTSENSE
–
PGOOD
TRACK/SS
ITH
DTR
V
RNG
SGND
RT
PGOOD
MB1
MT1
1µF
C
IN2
22µF
w4
+
C
IN1
180µF
+
2.55k
C
IN1
: SANYO 16SVP180MX
C
IN2
: MURATA GRM32ER61C226KE20L
C
OUT1
, C
OUT4
: MURATA GRM31CR60J107ME39L
C
OUT2
, C
OUT3
: SANYO 2R5TPE330M9
DB1, DB2: CENTRAL SEMI CMDSH-4ETR
L1, L2: VISHAY IHLP5050CEERR33M01
MT1, MT2: INFINEON BSC050NE2LS
MB1, MB2: INFINEON BSC010NE2LS
PHASMD
MODE/PLLIN
CLKOUT
RUN
LOAD CURRENT (A)
0.1
EFFICIENCY (%)
POWER LOSS (W)
80
90
100
1 10 100
3839 F18b
70
60
50
0
6
8
10
4
2
V
IN
= 12V
FORCED
CONTINUOUS
MODE
DISCONTINUOUS
MODE
LOSS
DCM
LOSS
FORCED CM
LOAD CURRENT (A)
0.1
EFFICIENCY (%)
POWER LOSS (W)
80
90
100
1 10 100
3839 F18c
70
60
50
0
6
8
10
4
2
V
IN
= 5V
FORCED
CONTINUOUS
MODE
DISCONTINUOUS
MODE
LOSS
DCM
LOSS
FORCED
CM