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MAX8791, MAX8791B

Single-Phase, Synchronous MOSFET Drivers

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

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Overview

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

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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

Design Resources

Quality And Environmental

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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