User Manual

MAX686
DAC-Controlled Boost/Inverter
LCD Bias Supply with Internal Switch
______________________________________________________________________________________ 15
Functional Diagram
V
DD
V
CC
GND
BIAS
MAX686
DN
POL
POK
PGND
ISET
LX
DACOUT
REF
1.25V
1.125V
1.125V
ERROR
AMP
FB
UP
DIGITAL
INTERFACE
ON-TIME/
OFF-TIME
CONTROL
CURRENT-LIMIT
COMPARATOR
POK
COMPARATOR
BANDGAP
REFERENCE
SHDN
LCDON
6-BIT
DAC