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MAX1517A Datasheet

TFT-LCD DC-DC Converters

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MAX1516A/MAX1517A/
MAX1518A
EVALUATION KIT AVAILABLE
TFT-LCD DC-DC Converters with
Operational Amplifiers
General Description
The MAX1516A/MAX1517A/MAX1518A include a high-
performance step-up regulator, two linear-regulator con-
trollers, and high-current operational amplifiers for active-
matrix thin-film transistor (TFT) liquid-crystal displays
(LCDs). Also included is a logic-controlled, high-voltage
switch with adjustable delay.
The step-up DC-DC converter provides the regulated sup-
ply voltage for the panel source driver ICs. The converter
is a high-frequency (1.2MHz) current-mode regulator
with an integrated 14V n-channel MOSFET that allows
the use of ultra-small inductors and ceramic capacitors.
It provides fast transient response to pulsed loads while
achieving efficiencies over 85%.
The gate-on and gate-off linear-regulator controllers pro-
vide regulated TFT gate-on and gate-off supplies using
external charge pumps attached to the switching node.
The MAX1518A includes five high-performance opera-
tional amplifiers, the MAX1517A includes three, and the
MAX1516A includes one operational amplifier. These
amplifiers are designed to drive the LCD backplane
(VCOM) and/or the gamma-correction divider string. The
devices feature high output current (±150mA), fast slew
rate (13V/μs), wide bandwidth (12MHz), and rail-to-rail
inputs and outputs.
The MAX1516A/MAX1517A/MAX1518A are available in
32-pin thin QFN packages with a maximum thickness of
0.8mm for ultra-thin LCD panels.
Applications
● Notebook Computer Displays
● LCD Monitor Panels
Ordering Information
PART
MAX1516AETJ+*
MAX1517AETJ+*
MAX1518AETJ+*
TEMP RANGE
-40°C to +100°C
-40°C to +100°C
-40°C to +100°C
PIN-PACKAGE
32 Thin QFN
32 Thin QFN
32 Thin QFN
*Denotes recommended for new designs.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configurations appear at end of data sheet.
Features
● 2.6V to 5.5V Input Supply Range
● 1.2MHz Current-Mode Step-Up Regulator
• Fast Transient Response to Pulsed Load
• High-Accuracy Output Voltage (1.5%)
• Built-In 14V, 2.4A, 0.16Ω n-Channel MOSFET
• High Efficiency (90%)
● Linear-Regulator Controllers for VGON and VGOFF
● High-Performance Operational Amplifiers
• ±150mA Output Short-Circuit Current
• 13V/μs Slew Rate
• 12MHz, -3dB Bandwidth
• Rail-to-Rail Inputs/Outputs
● Logic-Controlled, High-Voltage Switch with Adjustable
Delay
● Timer-Delay Fault Latch for All Regulator Outputs
● Thermal-Overload Protection
● 0.6mA Quiescent Current
Minimal Operating Circuit
VCN VCP
VIN
LX
IN
STEP-UP
CONTROLLER
FB
COMP
MAX1518A
GATE-ON
CONTROLLER
PGND
AGND
DRVP
FBP
SRC
COM
DRN
SWITCH
CONTROL
SUP
NEG1
OUT1 OP1
POS1
NEG2
GATE-OFF
CONTROLLER
REF
DEL
CTL
DRVN
FBN
REF
NEG4
OUT2 OP2
POS2
OP4 OUT4
POS4
NEG5
OUT3
OP3
POS3
OP5 OUT5
BGND
POS5
VMAIN
VCP
VGON
VCN
VGOFF
19-4019; Rev 1; 10/14
Maxim Integrated
Maxim Integrated



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