Datasheet

LTC3634
24
3634fb
For more information www.linear.com/LTC3634
Figure 9. Design Example Circuit
applicaTions inForMaTion
RUN1
RUN2
RT
INTV
CC
PHMODE
MODE/SYNC
ITH1
ITH2
LTC3634
3634 F09
L1
1.5µH
0.1µF
0.01µF
0.1µF
R1
12.1k
R2
24.3k
PGNDSGND
BOOST1
SW1
V
ON1
VDDQIN
V
FB1
BOOST2
SW2
V
FB2
V
ON2
VTTR
V
IN1
V
IN
3.6V TO 15V
V
IN2
L2
0.82µH
R3
324k
C
OUT2
100µF
×4
C
OUT1
100µF
×2
V
DDQ
1.8V
V
TT
0.9V
V
REF
0.9V
C5
10pF
R
COMP1
26.7k
C
COMP1
560pF
R
COMP2
18k
C
COMP2
910pF
C2
2.2µF
C1
47µF
×2
C4
10pF
Figure 10. Example of Power Component Layout
for QFN Package
Figure 11. Example of Power Component Layout
for TSSOP Package
SW1
SW2
VIAS TO GROUND
PLANE
VIAS TO GROUND
PLANE
VIAS TO GROUND
PLANE
VIA TO BOOST2
VIA TO BOOST1
VIA TO V
ON2
AND V
FB2
(NOT SHOWN)
VIA TO V
ON1
AND R2 (NOT SHOWN)
V
OUT2
V
OUT1
SGND (TO NONPOWER
COMPONENTS)
3634 F11
L1
L2
C
OUT2
C
OUT1
C
IN
C
IN
GND
GND
V
IN
C
BOOST1
C
BOOST2
SW2
C
BOOST2
C
BOOST1
SW1
VIAS TO GROUND
PLANE
VIAS TO GROUND
PLANE
VIAS TO GROUND
PLANE
VIA TO BOOST1
VIA TO BOOST2
VIA TO V
ON2
AND V
FB2
(NOT SHOWN)
VIA TO V
ON1
/R2 (NOT SHOWN)
V
OUT2
GND
V
IN
GND
V
OUT1
SGND (TO NONPOWER
COMPONENTS)
3634 F10
C
OUT2
C
IN
C
IN
C
OUT1
L2
L1