General Description

The MAX1542/MAX1543 include a high-performance boost regulator and two high- current operational amplifiers for active matrix, thin-film transistor (TFT), liquidcrystal displays (LCDs). Also included is a logic controlled, high- voltage switch with adjustable delay. The MAX1543 includes an additional high- voltage load switch and features pin-selectable boost regulator switching frequency.

Features

♦ Ultra-High-Performance Step-Up Regulator
Fast Transient Response to Pulsed Load Using
Current-Mode Control Architecture
High-Accuracy Output Voltage (1.3%)
Built-In 14V, 1.2A, 0.2Ω N-Channel Power
MOSFET with Lossless Current-Sensing
High Efficiency (85%)
8-Step Current-Controlled Digital Soft-Start
♦ Two High-Performance Operational Amplifiers
150mA Output Short-Circuit Current
7.5V/µs Slew Rate
12MHz -3dB Bandwidth
Rail-to-Rail Inputs/Outputs
Unity Gain Stable
♦ Logic-Controlled High-Voltage Switch with
Adjustable Delay
♦ Timer Delay Latch FB Fault Protection
♦ Thermal Protection
♦ 2.6V to 5.5V Input Operating Voltage Range
♦ 3.6mA (Switching), 0.45mA (Not Switching)
Quiescent Current
♦ Ultra-Thin 20-Pin Thin QFN Package
(5mm x 5mm x 0.8mm)

Applications

Notebook Computer Displays
LCD Monitor Panels
PDAs
Car Navigation Displays