Datasheet

Step-Up, Step-Down Regulator, Gate-On Charge Pump,
and Boost-Buck Regulator for TV TFT LCD Display
MAX17122
18 _____________________________________________________________________________________
In addition, the MAX17122 features an internal 5V lin-
ear regulator, well-defined power-up and power-down
sequences, and fault and thermal-overload protection.
Figure 2 shows the MAX17122’s functional diagram.
Figure 2. Functional Diagram
AVDD
GOFF2
GON
LX1
INCP
(AVDD)
VGON
POWER_
GOOD
3.3V
3.3V
IN
FROM
SYSTEM
VL
STEP-DOWN
GATEBST2
OSC
STEP-DOWN
HVS CONTROL
BOOST-BUCK
VGON PGOOD
POWER_
GOOD
FROM
SYSTEM
VL
IN
FBP
POSITIVE REG
DRVP
GPGD
NTC
SET
COMP3
FB3
LX3
IN3
RHVS
HVS
COMP1
FB1
GND1
LX1
STEP-
DOWN FB
150mV
VL
VL
SEQUENCE
STEP-DOWN
FB
3.3V PGOOD
NEGATIVE REG
FBN FBP
IN2
LX2
OUTB
FB2
AGND
VL
IN
EN1
EN2
DLY1
DLY2
SS
RESET
DEL
3.3V
DRVN
3.3V
VGOFF2
OUTB
IN
GOFF1
MAX17122