General Description
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

Features
♦ 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
♦ Positive Linear-Regulator Controller
♦ Negative Linear-Regulator Controller
♦ Triple-Level Protection Against Smoke or Fire
      Input Switch Replaces Input Fuse
      Output Overload Detection with Timer Latch
      Thermal Shutdown
♦ 2.7V to 5.5V Input Operating Range
♦ Ultra-Small External Components
♦ 1µA Shutdown Current (max)
♦ 1mA Quiescent Current (max)
♦ Ultra-Thin 16-Pin QFN Package (0.8mm Maximum Thickness)