19-ꢀ353; Rev 1; 5ꢁ12
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
MAX1075
General Description
Features
The MAX17075 includes a high-voltage boost regulator,
one high-current operational amplifier, two regulated
charge pumps, and one MLG block for gate-driver
supply modulation.
o 2.5V to 5.5V Input Operating Range
o Current Mode Step-Up Regulator
Fast-Transient Response
Built-In 20V, 3A, 0.16Ω n-Channel Power MOSFET
The step-up DC-DC converter is a 1.2MHz current-
mode boost regulator with a built-in power MOSFET. It
provides fast load-transient response to pulsed loads
while producing efficiencies over 85%. The built-in
160mΩ (typ) power MOSFET allows output voltages as
high as 18V boosted from inputs ranging from 2.5V to
5.5V. A built-in 7-bit digital soft-start function controls
startup inrush currents.
Cycle-by-Cycle Current Limit
87% Efficiency (5V Input to 13V Output)
1.2MHz Switching Frequency
1% Output Voltage Regulation Accuracy
o High-Current 18V VCOM Buffer
500mA Output Short-Circuit Current
45V/µs Slew Rate
20MHz -3dB Bandwidth
Rail-to-Rail Output
The gate-on and gate-off charge pumps provide regu-
lated TFT gate-on and gate-off supplies. Both output
voltages can be adjusted with external resistive
voltage-dividers.
o Regulated Charge Pump for TFT Gate-On Supply
o Regulated Charge Pump for TFT Gate-Off Supply
o Logic-Controlled High-Voltage Switches with
The operational amplifier, typically used to drive the
LCD backplane (VCOM), features high-output short-cir-
cuit current ( 500mA), fast slew-rate (ꢀ5Vꢁ/s), wide
bandwidth (20MHz), and rail-to-rail outputs.
Adjustable Delay
o Soft-Start and Timed Delay Fault Latch for All
Outputs
The MAX17075 is available in a 2ꢀ-pin thin QFN pack-
age with 0.5mm lead spacing. The package is a square
(ꢀmm x ꢀmm) with a maximum thickness of 0.8mm for
ultra-thin LCD design. It operates over the -ꢀ0°C to
+85°C temperature range.
o Overload and Thermal Protection
Simplified Operating Circuit
V
MAIN
V
IN
2.5V TO 5.5V
R1
10Ω
Applications
Notebook Computer Displays
VCC
OUT
LX
C5
1µF
FROM
SYSTEM
3.3V
PGND
LCD Monitor Panels
LCD TVs
FB
TO V
COM
COMP
V
IN
V
AVDD
MAX17075
Ordering Information
BGND
RST
RSTIN
NEG
POS
REF
PART
TEMP RANGE
PIN-PACKAGE
DRN
MAX17075ETG+
-40°C to +85°C
24 TQFN-EP*
*EP = Exposed paddle.
+Denotes a lead(Pb)-freeꢁRoHS-compliant package.
COM
SRC
V
GON
AGND
FBN
DRVP
V
GOFF
DRVN
BGND
FBP
DEL
SUP CTL EP
FROM
TCON
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.