MAX8740 TFT-LCD Step-Up DC-DC Converter

The MAX8740 is a high-performance, Step-up DC-DC converter that provides a regulated supply voltage for active-matrix, thin-film Transistor (TFT), liquid-crystal Displays (LCDs). The MAX8740 incorporates currentmode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in n-channel Power MOSFET to achieve high efficiency and fast transient response. Users CAN select 640kHz or 1.2MHz operation using a Logic input pin (FREQ). The high switching frequencies allow the use of ultra-small inductors and low-ESR ceramic capacitors. The current-mode architecture provides fast transient response to pulsed loads. A compensation pin (COMP) gives users flexibility in adjusting loop dynamics. The 30V internal MOSFET CAN generate output voltages up to 28V from a 2.6V and 5.5V input voltage range. Soft-start slowly ramps the input current and is programmed with an external capacitor. The MAX8740 is available in a 10-pin thin DFN package.
By Maxim Integrated Products