MAX17491GTA+T Gate Drivers Single-Phase Synchronous MOSFET Driver

Half-Bridge Gate Driver IC Non-Inverting 8-TQFN (3x3)

Description
The MAX17491 is a single-phase synchronous nonin-
verting MOSFET driver. The MAX17491 is intended to
work with controller ICs like the MAX8736, MAX8786, or
MAX17030 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 conver-
sion method allows the highest possible efficiency, while
the 2-stage conversion at higher switching frequency
provides the minimum possible physical size.
The low-side driver is optimized to drive 3nF capacitive
loads with 4ns/8ns typical fall/ise times, and the high-
side driver with 8ns/10ns typical fal/rise times. Adaptive
dead-time control prevents shoot-through currents and
maximizes converter efficiency.
The MAX17491 features improved zero crossing and
UVLO performance over the MAX8791/MAX8791B.
The MAX17491 is available in a small, lead-free, 8-pin,
3mm x 3mm TQFN package.

Applications
Notebooks/Desktops/Servers
CPU Core Power Supplies
Multiphase Step-Down Converters

Features

●Single-Phase Synchronous MOSFET Driver
●0.5Q Low-Side On-Resistance
●0.7Q High-Side On-Resistance
●10ns Minimum Guaranteed Dead Time
●Integrated Boost "Diode"
●2V to 24V Input Voltage Range
●Selectable Pulse Skipping Mode
●Low-Profile, 3mm x 3mm, TQFN Package

Key Features 

• Single-phase synchronous noninverting MOSFET driver
• Optimized low-side and high-side drivers with fast fall/rise times
• Adaptive dead-time control to prevent shoot-through currents and maximize efficiency
• Improved zero crossing and undervoltage lockout (UVLO) performance compared to previous models
• Integrated boost "diode" for input voltage range up to 24V
• Selectable pulse-skipping mode for improved efficiency
• Compact package size: x 3mm TQFN [1]

Specifications

• Input Voltage Range: VDD to GND (-0.3V to +6V)
• Undervoltage Lockout Threshold: VUVLO(VDD)
• Quiescent Supply Current: IDD
• PWM Pulse Width, Propagation Delay, and Dead Time: tON(MIN), DL Propagation Delay,
• DH Propagation Delay, DL-to-DH Dead Time, DH-to-DL Dead Time
• DL and DH Transition Times: tF_DL, tR_DL, tF_DH, tR_DH
• DL and DH Driver On-Resistance: RON(DL), RON(DH)
• Boost On-Resistance: RON(BST)
• Zero-Crossing Threshold: VZX
• DL Driver Sink Current: IDL_SINK
• PWM Input Levels and Current: Midlevel, Low, Midlevel PWM Input Current
• Shutdown Hold Time: tMID
• SKIP Input Threshold and Current: SKIP Input Threshold, ISKIP
• Thermal-Shutdown Threshold: TSHDN