MAX1889 - Maxim Integrated

MAX1889 Triple-Output TFT LCD Power Supply

The MAX1889 provides the three regulated output voltages required for active matrix, thin-film transistor liquid crystal displays (TFT LCDs). It combines a high-performance step-up regulator with two linear-regulator controllers and multiple levels of protection circuitry for a complete power-supply system. The main DC-DC converter is a high-frequency (500kH.

Features

o High-Performance Step-Up Regulator Fast Transient Response Current-Mode Control Architecture Built-In High-Efficiency N-Channel Power MOSFET Current-Limit Comparator >85% Efficiency Selectable Switching Frequency (500kHz/1MHz) Internal Soft-Start o Positive Linear-Regulator Controller o Negative Linear-Regulator Controller o Triple-Level Protection Against Smoke or Fire Input Switch Replaces Input Fuse Output Overload Detection with Timer Latch Thermal Shutdown o 2.7V to 5.5V Input Operating Range o Ultra-Small External Components o 1µA Shutdown Current (max) o 1mA Quiescent Current (max) o .