The MAX1542/MAX1543 include a high-performance
boost regulator and two high-current operational amplifiers
for active matrix, thin-film transistor (TFT), liquidcrystal
displays (LCDs). Also included is a logiccontrolled,
high-voltage switch with adjustable delay.
The MAX1543 includes an additional high-voltage load
switch and features pin-selectable boost regulator
switching frequency.
The step-up DC-to-DC converter is a high-frequency
640kHz (MAX1543)/1.2MHz (MAX1542/MAX1543) current-
mode regulator with a built-in power MOSFET that
allows the use of ultra-small inductors and ceramic
capacitors. It provides fast transient response to pulsed
loads while producing efficiencies over 85%.
The two easy-to-use, high-performance operational
amplifiers can drive the LCD backplane (VCOM) and/or
the gamma correction divider string. The devices feature
high short-circuit current (150mA), fast slew rate
(7.5V/μs), wide bandwidth (12MHz), and Rail-to-Rail?
inputs and outputs.
The MAX1542/MAX1543 are available in 20-pin thin
QFN packages with a maximum thickness of 0.8mm for
ultra-thin LCD panel design.
Applications
Notebook Computer Displays
LCD Monitor Panels
PDAs
Car Navigation Displays