MAX1516 Datasheet, PDF (1/26 Pages) Maxim Integrated Products – TFT-LCD DC-DC Converters with Operational Amplifiers

19-3244; Rev 0; 4/04
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TFT-LCD DC-DC Converters with
Operational Amplifiers
General Description
The MAX1516/MAX1517/MAX1518 include a high-perfor-
mance step-up regulator, two linear-regulator controllers,
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
supply voltage for the panel source driver ICs. The con-
verter is a high-frequency (1.2MHz) current-mode regu-
lator 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
provide regulated TFT gate-on and gate-off supplies
using external charge pumps attached to the switching
node. The MAX1518 includes five high-performance
operational amplifiers, the MAX1517 includes three,
and the MAX1516 includes one operational amplifier.
These amplifiers are designed to drive the LCD back-
plane (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 MAX1516/MAX1517/MAX1518 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
Automotive Displays
Ordering Information
PART
MAX1516ETJ
MAX1517ETJ
MAX1518ETJ
TEMP RANGE
-40°C to +100°C
-40°C to +100°C
-40°C to +100°C
PIN-PACKAGE
32 Thin QFN 5mm x 5mm
32 Thin QFN 5mm x 5mm
32 Thin QFN 5mm x 5mm
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 V_GON and V_GOFF
♦ 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
FB
STEP-UP
CONTROLLER
COMP
PGND
AGND
MAX1518
GATE-ON
CONTROLLER
DRVP
FBP
SRC
COM
SWITCH
CONTROL
DRN
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
OUT5
OP5
BGND
POS5
VMAIN
VCP
VGON
VCN
VGOFF
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
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