MAX8811

The MAX8811 2-phase gate driver controls power MOSFETs in multiphase synchronous step-down converter applications, providing up to 30A output current per phase. The MAX8811 and MAX8810A (multiphase power-supply controller) combine to provide an efficient, low-cost solution for a wide range of multiphase power-supply applications. The MAX8811 handles system input voltages up to 26V. Each MOSFET driver is capable of driving 3000pF capacitive loads with 11ns typical rise and fall times.

Adaptive shoot-through protection circuitry is implemented to prevent shoot-through currents for the "high-side off to low-side on" transition. A programmable delay is provided for the "low-side off to high-side on" transition. This maximizes overall converter efficiency while supporting operation with a variety of MOSFETs.

The MAX8811 provides an easy upgrade path from the MAX8523 dual driver. Integrated bootstrap diodes reduce external component count, while an enable input provides flexibility for power sequencing. The MAX8811 is available in a space-saving, 16-pin QSOP.

Applications

• DC-DC Converter Modules
• Multiphase Buck Converters
• Processor Core Voltage Regulators
• Switching Power Supplies
• Voltage-Regulator Modules (VRMs)