Datasheet

LTC3891
27
3891fa
APPLICATIONS INFORMATION
V
IN
C
IN
C
OUT
V
PULL-UP
R
OUT
C
INTVCC
M1
PGOOD
1µF
CERAMIC
L1
V
OUT
3891 F10
R
SENSE
SENSE
–
SENSE
+
V
FB
ITH
EXTV
CC
INTV
CC
BG
BOOST
SW
TG
PGOOD
LTC3891
TRACK/SS
FREQ
PLLIN/MODE
SGND
SGND
RUN
*R1, C1 AND D1 ARE OPTIONAL
R1*
C1*
M2
D1*
+
+
I
LIM
V
IN
PGND
GND
R
L1
D1
L1
SW
R
SENSE
V
OUT
C
OUT
V
IN
C
IN
R
IN
BOLD LINES INDICATE HIGH SWITCHING
CURRENT. KEEP LINES TO A MINIMUM LENGTH.
3891 F11
Figure 10. Recommended Printed Circuit Layout Diagram
Figure 11. Branch Current Waveforms