MAX686 Maxim, MAX686 Datasheet - Page 8

• Manufacturer Part Number: MAX686
• Description: DAC-Controlled Boost/Inverter LCD Bias Supply with Internal Switch
• Manufacturer: Maxim

DAC-Controlled Boost/Inverter
LCD Bias Supply with Internal Switch
Figure 1. Boost Configuration: Positive Output Voltage
Figure 2. Negative Output Voltage Application Circuit
8
_______________________________________________________________________________________
V
IN
= 0.8V TO 27.5V
V
IN
= 0.8V TO 27.5V
V
V
CC
CC
= 2.7V TO 5.5V
= 2.7V TO 5.5V
15 F
15 F
DAC CONTROL
DAC CONTROL
0.1 F
0.1 F
ON/OFF
ON/OFF
V
V
UP
DN
SHDN
POL
V
V
POL
UP
DN
SHDN
CC
DD
CC
DD
GND
GND
MAX686
MAX686
22 H
22 H
L1
L1
DACOUT
DACOUT
LCDON
PGND
LCDON
PGND
ISET
POK
ISET
POK
REF
REF
LX
FB
LX
FB
MBR0530L
R3
R3
2
R4
D1
R1
0.1 F
0.1 F
2.2 F
R2
R1
MBRO530L
R2
D2
C
100pF
C
22pF
F
F
V
IN
2.2 F
4.7 F
|
V
OUT
NEGATIVE
VOLTAGE
D1
MBRO530L
OUTPUT
|
27.5V
0.1 F
V
OUT