Datasheet

MAX1748/MAX8726
Triple-Output TFT-LCD
DC-DC Converters
14 ______________________________________________________________________________________
C
INTG
470pF
C
REF
0.22μF
R4 49.9kΩ
R3
1MΩ
0.22μF
6.8μH
0.1μF
1.0μF
0.47μF
V
MAIN
= +18V, 140mA
V
NEG
= -8V, 20mA
R5
319kΩ
R6
49.9kΩ
V
IN
= 5.0V
SUPN SHDN RDY
V
POS
=
+25V, 5mA
R2 10kΩ
R1 130kΩ
R
COMP
5kΩ
C
COMP
68nF
C
OUT
10μF
IN SUPP
LX FB
DRVP
FBP
INTG
TGND
GND
FBN REF PGND
MAX1748 MAX8726
0.22μF
0.1μF
0.47μF
3.3μF
100kΩ
DRVN
1.0μF
Figure 4. Power Supply Using Cascoded MOSFET