Datasheet

MAX1748/MAX8726
Triple-Output TFT-LCD
DC-DC Converters
10 ______________________________________________________________________________________
GND
PGND
R6
C
REF
0.22μF
V
SUPN
= 2.7V TO 13V
V
POS
= (R5 / R6) x V
REF
V
REF
= 1.25V
SUPN
OSC
R5
V
NEG
C5
C6
D5
D4
+
-
DRVN
FBN
REF
MAX1748
MAX8726
+
-
V
REF
1.25V
Figure 2. Negative Charge-Pump Block Diagram
GND
PGND
V
REF
1.25V
R4
V
SUPP
= 2.7V TO 13V
V
POS
= [1 + (R3 / R4)] x V
REF
V
REF
= 1.25V
SUPP
OSC
R3
V
POS
C3
C4
D3
D2
+
-
DRVP
FBP
MAX1748
MAX8726
+
-
Figure 3. Positive Charge-Pump Block Diagram