Internal-Switch Boost Regulator with Integrated High-Voltage Level Shifter and Op Amp

The MAX17010 contains a high-performance step-up switching regulator, a high-speed operational amplifier (op amp), and a high-voltage level-shifting scan driver. The device is optimized for thin-film transistor (TFT) liquid-crystal display (LCD) applications.

The step-up DC-DC converter provides the regulated supply voltage for the panel-source driver ICs. The converter is a 1.2MHz current-mode regulator with an integrated 20V n-channel power MOSFET. The high switching frequency allows the use of ultra-small inductors and ceramic capacitors. The current-mode control architecture provides fast transient response to pulsed loads. The step-up regulator features undervoltage lockout (UVLO), soft-start, and internal current limit. The high-current op amp is designed to drive the LCD backplane (VCOM). The amplifier features high output current (±150mA), fast slew rate (45V/µs), wide bandwidth (20MHz), and rail-to-rail inputs and outputs.

The high-voltage, level-shifting scan driver is designed to work with panels that incorporate row drivers on the panel glass. Its eight outputs swing from +30V (max) to -10V and can swiftly drive capacitive loads.

The MAX17010 is available in a 40-pin thin QFN package with a maximum thickness of 0.8mm for ultra-thin LCD panels. The device operates over the -40°C to +85°C temperature range.

Applications

* LCD Monitor Panels * Notebook Computer Displays

* 1.8V to 5.5V IN Supply Voltage Range

* 3mA SUP Quiescent Current (Switching)

* 1.2MHz Current-Mode Step-Up Regulator

* Fast Transient Response

* High-Accuracy Output Voltage (1.0%)

* Built-In 20V, 1.9A, 200mΩ MOSFET

* High Efficiency (> 85%)

* Digital Soft-Start

* High-Speed Op Amp

* 150mA Output Current

* 45V/µs Slew Rate

* 20MHz, -3dB Bandwidth

* High-Voltage Level-Shifting Scan Drivers

* Logic-Level Inputs

* +30V to -10V Output Rails

* Thermal-Overload Protection

* 40-Pin, 5mm x 5mm, Thin QFN Package