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
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.
- LCD Monitor Panels
- LCD TVs
- Notebook Computer Displays
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The MAX17075 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that provides the voltages and features required for active-matrix thin-film transistor (TFT), liquid-crystal display (LCD) panels in LCD monitors and LCD TVs. The EV kit contains a step-up switching regulator, a two-stage positive charge pump for the TFT gate-on supply, a single-stage negative charge pump for the TFT gate-off supply, and a high-current op amp. Also included is a logic-controlled high-voltage switch array, with capacitor control delay, for the positive gate-driver supply. A capacitive dummy load is provided at the high-voltage switch output for ease of testing without an attached panel.
The MAX17075 EV kit is designed to operate from a DC supply voltage of +2.5V to +5.5V. At +5V (±10%) nominal input voltage, the step-up switching regulator provides a +13V output and up to 500mA. The positive charge pump provides a +30V output and up to 30mA. The negative charge pump provides a -7V output and up to 60mA. The high-current op amp provides a +6.5V output that can source or sink 500mA peak current. The high-voltage switch array is controlled by external logic.
The MAX17075 switches at 1.2MHz, allowing the use of tiny surface-mount components. The MAX17075 thin QFN package (0.8mm maximum height) with low-profile external components allows this circuit to be less than 3mm high.
Features & Benefits
- +2.5V to +5.5V Input-Voltage Range
- Output Voltages (+4.5V to +5.5V Input Voltage)
- +13V Output at 500mA (Step-Up Switching Regulator)
- +30V Output at 30mA (Positive Charge Pump)
- -7V Output at 60mA (Negative Charge Pump)
- High-Current Op Amp (±500mA Peak Current)
- 1.2MHz Switching Frequency
- All Output Voltages are Resistor Adjustable
- Logic-Controlled High-Voltage Switches with Capacitor Control Delay
- Low-Profile Surface-Mount Components
- Lead(Pb)-Free and RoHS Compliant
- Fully Assembled and Tested
Documentation & Resources
MAX17075 Reliability Data1/12/202332K
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.