Rainbow Electronics MAX1748 - Manual (Page 14)

MAX1748
Triple-Output TFT LCD DC-DC Converter
14 ______________________________________________________________________________________
C
INTG
470pF
C
REF
0.22
µ
F
R4 49.9k
R3 1M
0.22
µ
F
6.8
µ
H
0.1
µ
F
1.0
µ
F
0.47
µ
F
V
MAIN
=
+18V, 140mA
V
NEG
=
-8V, 20mA
R5
319k
R6
49.9k
V
IN
=
5.0V
SUPN SHDN RDY
V
POS
=
+25V, 5mA
R2 10k R1 130k
R
COMP
5k
C
COMP
68nF
C
OUT
10
µ
F
IN
SUPP
LX FB
DRVP
FBP INTG
TGND GND
FBN REF PGND
MAX1748
0.22
µ
F
0.1
µ
F
0.47
µ
F
3.3
µ
F
100k
DRVN
1.0
µ
F
Figure 4. Power Supply Using Cascoded MOSFET