Datasheet

33
LTC1702
1702fa
TYPICAL APPLICATIONS
U
BOOST1 TG1 SW1 BG1 I
MAX1
COMP1 FB1 RUN/SS1
BOOST2
TG2
SW2
BG2
I
MAX2
COMP2
FB2
RUN/SS2
LTC1702
V
CC
PV
CC
GND
PGND
+
+
+
V
OUT1
1.8V
10A
C
OUT1
470µF
× 2
R11
10k
0.1%
C11
330pF
R
B1
7.96k 0.1%
C21 680pF
C31
560pF
L
EXT1
1µH
12A
L
EXT2
2.2µH 6A
R31, 4.7k
R21, 13k
Q11 Q21
D
CP2
MBR0530T
D
CP1
MBR0530T
C
CP1
1µF
C
CP2
1µF
D2 MBR330T
1µF
R
IMAX1
, 22k
C
SS1
0.1µF
C
SS2
0.1µF
10Ω
C
IN
470µF
× 2
Q12
Q22
V
OUT2
3.3V 3A
C
OUT2
470µF
C12 120pF
C22
270pF
R22, 20k
1702 TA05
R
B2
1.62k 0.1%
R12 4.99k 0.1%
C32 820pF
R32, 2.2k
Q11, Q21: FAIRCHILD FDS6670A Q12, Q22: 1/2 SILICONIX Si9402
C
IN
, C
OUT1
, C
OUT2
: KEMET T510X477M006AS
R
IMAX2
, 47k
V
IN
= 5V ±10%
L
EXT1
: MURATA LQT12535C1ROM12
L
EXT2
: COILTRONICS UP2B-2R2
28W Dual Output Power Supply