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Preliminary
EUP2619
TFT LCD DC-DC Converter with Integrated Charge Pumps and OP-AMP
DESCRIPTION
The EUP2619 generates power supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in tablet PCs and notebooks operated from 2.5V to 5.5V input supply. The device integrates a step-up converter, positive and negative charge pumps, and a high speed VCOM buffer. The external compensated step-up converter, providing the regulated supply voltage for the panel source driver ICs, features an internal power MOSFET and high frequency operation allowing to use small inductors and capacitors. The step up converter uses fixed-frequency peak current mode control architecture which provides fast load-transient response and easy compensation. A 2.