EUP2644 Datasheet | Eutech Microelectronics

Preliminary TFT LCD DC-DC Converter with Integrated LDO, OP-AMP and GPM Switch DESCRIPTION The EUP2644 generates power supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in monitors and notebooks operation from 3V to 5.5V input supply. The device integrates a step-up converter, a high speed V buffer, a 400m A low dropout (LDO) linear regulator, and a Gate Pulse Modulator (GPM). The external pensated step up converter Features an internal power MOSFET and high frequency operation allowing the use of small inductors and capacitors. The step up converter uses fixed-frequency, current mode control architecture which provides fast load-transient response and easy pensation. A 2.9A peak current limit for the internal switch protects power supply fault condition. The GPM provides a modulated voltage to the gate driver circuitry of a TFT LCD display. It allows shaping of the gate high voltage to improve image quality. It also can delay the gate high voltage while power on. Both the power-on delay time and the falling time of the gate high voltage are programmable by external resistor and capacitor. The high speed V butter Features continues output current (±100m A), 20MHz bandwidth, fast slew rate 70V/µs, and rail-to-rail inputs and outputs. The LDO regulator provides up to 400m A current to the external digital circuitry. VÛm w`R - yÑb € m Features z z 3V to 5.5V Input Supply Range Current Mode Step Up Converter - Selectable Frequency (650k Hz/1.2MHz) - Built-In 20V, 2.9A, 0.15Ω N-MOSFET - High Efficiency Up to 90% - Programmable Soft-Start - Fast Transient Response to Pulsed Load Gate Pulse Modulator Circuit - Adjustable Falling Time and Delay - Flicker pensation High Speed High Output Current V Buffer - 20MHz BW - 70V/µS Slew Rate - 400m A Peak Output Current 400m A LDO Regulator for VLOGIC - Adjustable Output Voltage¡G2.5V, 2.85V, 3.3V Input Under Voltage Lockout and Thermal Protection 24 pin 4mm × 4mm TQFN Package Ro...