Manual

MAX1779
Low-Power Triple-Output TFT LCD DC-DC
Converter
______________________________________________________________________________________ 15
C
REF
0.22µF
C
INTG
3300pF
R4 49.9k
R3
549k
0.1µF
10µH
V
IN
= +3.0V
SHDN RDY
V
POS
=
+15V, 1mA
R2 50k
R1 150k
R
COMP
10k
C
COMP
220pF
V
MAIN
= +5V
C
OUT
(2) 4.7µF
IN LX
FB
SUPN
SUPP
DRVP
FBP
PGND
DRVN INTG TGND GND
MAX1779
0.1µF
1.0µF
R5
320k R6
49.9k
V
NEG
= -8V, 1mA
FBN REF
0.1µF
1.0µF
(2) 4.7µF
100k
1.0µF
0.47µF
Figure 4. Minimizing the Number of Charge-Pump Stages