Datasheet

LTC3850/LTC3850-1
26
38501fc
APPLICATIONS INFORMATION
Figure 13. Branch Current Waveforms
R
L1
D1
L1
SW1
R
SENSE1
V
OUT1
C
OUT1
V
IN
C
IN
R
IN
R
L2
D2
BOLD LINES INDICATE
HIGH SWITCHING
CURRENT. KEEP LINES
TO A MINIMUM LENGTH.
L2
SW2
38501 F13
R
SENSE2
V
OUT2
C
OUT2
Figure 12. Recommended Printed Circuit Layout Diagram
C
B2
C
B1
C
INTVCC
+
C
IN
D1
1µF
CERAMIC
M1 M2
M3
M4
D2
+
C
VIN
V
IN
R
IN
L1
L2
C
OUT1
V
OUT1
GND
V
OUT2
38501 F12
+
C
OUT2
+
R
SENSE
R
SENSE
R
PU2
PGOOD
V
PULL-UP
f
IN
1µF
CERAMIC
I
TH1
V
FB1
SENSE1
+
SENSE1
–
PLLLPF
SENSE2
–
SENSE2
+
V
FB2
I
TH2
TK/SS2
TK/SS1
PGOOD
TG1
SW1
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
SW2
TG2
SGND
I
LIM
MODE/PLLIN
RUN1
RUN2