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