General Description

The EC9219 include a high-performance step-up regulator, and high-current operational amplifiers for active-matrix
thin-film transistor (TFT) liquid-crystal displays (LCDs).

The step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (1.2MHz or 640KHZ) current-mode regulator with an integrated 18V 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 EC9219 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
(17V/μs), wide bandwidth (12MHz), and rail-to-rail inputs and outputs The EC9219 are available in 14- pin thin TSOP packages with a maximum thickness of 1mm for ultra-thin LCD panels.

Features

◆2.6V to 5.5V Input Supply Range
◆1.2MHz or 640KHZ Current-Mode Step-Up Regulator
◆Fast Transient Response to Pulsed Load
◆High-Accuracy Output Voltage ( 2% )
◆Built-In 18V, 1.6A, 0.16Ω N-Channel MOSFET
◆High Efficiency (90%)
◆High-Performance Operational Amplifiers
◆17V/μs Slew Rate
◆12MHz, -3dB Bandwidth
◆Rail-to-Rail Inputs/Outputs
◆Thermal-Overload Protection

Applications

◆Notebook Computer Displays ,
◆LCD Monitor Panels ,
◆Automotive Displays