MAX8739 Datasheet | Maxim Integrated

Features - 1.8V to 5.5V Input Supply Range - 600k Hz/1.2MHz Current-Mode Step-Up Regulator Fast Transient Response to Pulsed Load High-Accuracy Output Voltage (1.5%) Built-In 14V, 1.9A, 0.2Ω n-Channel MOSFET High Efficiency (> 85%) Digital Soft-Start - Two High-Performance Operational Amplifiers ±150m A Output Short-Circuit Current 7.5V/µs Slew Rate 12MHz, -3d B Bandwidth Rail-to-Rail Inputs/Outputs - Logic-Controlled, High-Voltage Switch with Adjustable Delay - Built-In Power-Up Sequence - Input Supply Undervoltage Lockout - Timer Delay Fault Latch for All Regulator Outputs - Thermal-Overload Protection General Description The MAX8739 includes a high-performance, step-up regulator and two high-current operational amplifiers for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs). The input supply voltage range of the MAX8739 is from 1.8V to 5.5V. The device also includes a logic-controlled, high-voltage switch with adjustable delay. The step-up DC-DC converter provides the regulated .. supply voltage for the panel source driver ICs. The converter is a high-frequency (600k Hz/1.2MHz) currentmode regulator with an integrated 14V n-channel MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loads while achieving efficiencies over 85%. The two high-performance operational amplifiers are designed to drive the LCD backplane (V) and/or the gamma-correction-divider string. The devices feature high output current (±150m A), fast slew rate (7.5V/µs), wide bandwidth (12MHz), and rail-to-rail inputs and outputs. The MAX8739 is available in a 20-pin, 5mm × 5mm thin QFN package with a maximum thickness of 0.8mm for ultra-thin LCD panels. Applications Notebook puter Displays LCD Monitor Panels Automotive Displays Simplified Operating Circuit VIN +1.8V TO +5.5V LX IN FB MAX8739 FREQ P NEG1 OUT1 TO V BACKPLANE NEG2 OUT2 LDO POS1 POS2 AGND PGND SUP VMAIN Ordering Information PART...