Data Sheet Rev. 2

Overview

Features and Benefits

  • 2.5V to 5.5V Input Operating Range
  • Current Mode Step-Up Regulator
    • Fast-Transient Response
    • Built-In 20V, 3A, 0.16Ω n-Channel Power MOSFET
    • Cycle-by-Cycle Current Limit
    • 87% Efficiency (5V Input to 13V Output)
    • 1.2MHz Switching Frequency
    • ±1% Output Voltage Regulation Accuracy
  • High-Current 18V VCOM Buffer
    • ±500mA Output Short-Circuit Current
    • 45V/µs Slew Rate
    • 20MHz -3dB Bandwidth
    • Rail-to-Rail Output
  • Regulated Charge Pump for TFT Gate-On Supply
  • Regulated Charge Pump for TFT Gate-Off Supply
  • Logic-Controlled High-Voltage Switches with Adjustable Delay
  • Soft-Start and Timed Delay Fault Latch for All Outputs
  • Overload and Thermal Protection

Product Details

The MAX17075 includes a high-voltage boost regulator,one high-current operational amplifier, two regulated charge pumps, and one MLG block for gate-driver supply modulation.

The step-up DC-DC converter is a 1.2MHz current-mode boost regulator with a built-in power MOSFET. It provides fast load-transient response to pulsed loads while producing efficiencies over 85%. The built-in 160mΩ (typ) power MOSFET allows output voltages as high as 18V boosted from inputs ranging from 2.5V to 5.5V. A built-in 7-bit digital soft-start function controls startup inrush currents.

The gate-on and gate-off charge pumps provide regulated TFT gate-on and gate-off supplies. Both output voltages can be adjusted with external resistive voltage-dividers.

The operational amplifier, typically used to drive the LCD backplane (VCOM), features high-output short-circuit current (±500mA), fast slew-rate (45V/µs), wide bandwidth (20MHz), and rail-to-rail outputs.

The MAX17075 is available in a 24-pin thin QFN package with 0.5mm lead spacing. The package is a square (4mm x 4mm) with a maximum thickness of 0.8mm for ultra-thin LCD design. It operates over the -40°C to +105°C temperature range.

Applications

  • LCD Monitor Panels
  • LCD TVs
  • Notebook Computer Displays

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  • Data Sheets (1)
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