MAX8791, MAX8791B

Single-Phase, Synchronous MOSFET Drivers

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


Please check latest availability status for a specific part variant.

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.
MAX8791: Typical Operating Circuit MAX8791: Typical Operating Circuit Enlarge+

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
Product Reliability Reports: MAX8791.pdf 
Request Reliability Report for: MAX8791B 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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