Rainbow Electronics MAX1779 - Manual (Page 15)

MAX1779
Low-Power Triple-Output TFT LCD DC-DC
Converter
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C
REF
0.22
µ
F
C
INTG
3300pF
R4 49.9k
R3
549k
0.1
µ
F
10
µ
H
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) 4.7
µ
F
IN
LX FB
SUPN SUPP DRVP
FBP
PGND
DRVN INTG TGND GND
MAX1779
0.1
µ
F
1.0
µ
F
R5
320k
R6
49.9k
V
NEG
=
-8V, 1mA
FBN REF
0.1
µ
F
1.0
µ
F
(2) 4.7
µ
F
100k
1.0
µ
F
0.47
µ
F
Figure 4. Minimizing the Number of Charge-Pump Stages