Datasheet
LTC3839
46
3839fa
TYPICAL APPLICATIONS
Figure 19. 6.5V to 34V Input, 5V/25A Output, 300kHz, R
SENSE
, 5V Output Tied to EXTV
CC
, Step-Down Converter
LOAD CURRENT (A)
0.1
EFFICIENCY (%)
POWER LOSS (W)
80
90
100
1 10 100
3839 F19c
70
60
6
8
4
2
0
V
IN
= 28V
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 F19b
70
60
6
8
4
2
0
V
IN
= 12V
FORCED
CONTINUOUS
MODE
DISCONTINUOUS
MODE
LOSS
DCM
LOSS
FORCED CM
3839 F19a
1nF
0.1µF
L2
2.2µH
C
OUT4
100µF
C
OUT3
150µF
w2
DB2
V
OUT
MT2
MB2
+
LTC3839
2.2
2.2
73.2k
100k
137k
470pF
22pF
27.4k
V
IN
1µF
1nF
4.7µF
0.1µF
0.01µF
L1
2.2µH
R
S1
0.002
R
S2
0.002
C
OUT2
150µF
w2
C
OUT1
100µF
V
OUT
5V
25A
V
IN
6.5V TO 34V
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
10µF
w3
+
C
IN1
56µF
w3
+
20
20
20
20
C
IN1
: SUNCON 50HVH56M
C
IN2
: MURATA GRM32ER71H106KA12L
C
OUT1
, C
OUT4
: MURATA GRM31CR60J107ME39L
C
OUT2
, C
OUT3
: SANYO 6TPE150MIC2
DB1, DB2: ZETEX ZLLS1000
L1, L2: WÜRTH 7443320220
MT1, MT2: INFINEON BSC093N04LSG
MB1, MB2: INFINEON BSC035N04LSG
PHASMD
MODE/PLLIN
CLKOUT
RUN