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Single-Phase, Synchronous MOSFET Drivers

Single-Phase Gate Drivers with Low Driver On-Resistance Provide Up to 7A Output Peak Current

Product Details

The MAX8791/MAX8791B are single-phase, synchronous, noninverting MOSFET drivers. The MAX8791/MAX8791B are intended to work with controller ICs like the MAX8736 or MAX8786, in multiphase notebook CPU core regulators.

The regulators can either step down directly from the battery voltage to create the core voltage, or step down from the main system supply. The single-stage conversion method allows the highest possible efficiency, while the 2-stage conversion at higher switching frequency provides the minimum possible physical size.

The low-side drivers are optimized to drive 3nF capacitive loads with 4ns/8ns typical fall/rise times, and the high-side driver with 8ns/10ns typical fall/rise times. Adaptive dead-time control prevents shoot-through currents and maximizes converter efficiency.

The MAX8791/MAX8791B are available in a small, lead-free, 8-pin, 3mm x 3mm TQFN package.

Key Features

  • Single-Phase, Synchronous MOSFET Drivers
  • 0.5Ω Low-Side On-Resistance
  • 0.7Ω High-Side On-Resistance
  • 8ns Propagation Delay
  • 15ns Minimum Guaranteed Dead Time
  • Integrated Boost "Diode"
  • 2V to 24V Input Voltage Range
  • Selectable Pulse-Skipping Mode
  • Low-Profile TQFN Package

Applications/Uses

  • CPU Core Power Supply
  • Multiphase Step-Down Converters
  • Notebooks/Desktops/Servers

Simplified Block Diagram

MAX8791: Typical Operating Circuit MAX8791: Typical Operating Circuit Zoom icon

Technical Docs

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Parameters

Key Features

  • Single-Phase, Synchronous MOSFET Drivers
  • 0.5Ω Low-Side On-Resistance
  • 0.7Ω High-Side On-Resistance
  • 8ns Propagation Delay
  • 15ns Minimum Guaranteed Dead Time
  • Integrated Boost "Diode"
  • 2V to 24V Input Voltage Range
  • Selectable Pulse-Skipping Mode
  • Low-Profile TQFN Package

Applications/Uses

  • CPU Core Power Supply
  • Multiphase Step-Down Converters
  • Notebooks/Desktops/Servers

Description

The MAX8791/MAX8791B are single-phase, synchronous, noninverting MOSFET drivers. The MAX8791/MAX8791B are intended to work with controller ICs like the MAX8736 or MAX8786, in multiphase notebook CPU core regulators.

The regulators can either step down directly from the battery voltage to create the core voltage, or step down from the main system supply. The single-stage conversion method allows the highest possible efficiency, while the 2-stage conversion at higher switching frequency provides the minimum possible physical size.

The low-side drivers are optimized to drive 3nF capacitive loads with 4ns/8ns typical fall/rise times, and the high-side driver with 8ns/10ns typical fall/rise times. Adaptive dead-time control prevents shoot-through currents and maximizes converter efficiency.

The MAX8791/MAX8791B are available in a small, lead-free, 8-pin, 3mm x 3mm TQFN package.

Simplified Block Diagram

MAX8791: Typical Operating Circuit MAX8791: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal