August 2007 Rev 1 1/16
1
L6741
High current MOSFET driver
Features
■ Dual MOSFET driver for synchronous rectified
converters
■ High driving current for fast external MOSFET
switching
■ High frequency operation
■ Integrated bootstrap diode
■ Adaptive dead-time management
■ Flexible gate-drive: 5V to 12V compatible
■ High-impedance (HiZ) management for output
stage shutdown
■ Preliminary OV protection
■ SO-8 package
Applications
■ High current VRM / VRD for Desktop / Server /
Workstation CPUs
■ High current DC / DC converters
Description
L6741 is a flexible, high-frequency dual-driver
specifically designed to drive N-channel
MOSFETs connected in Synchronous-Rectified
Buck topology. Combined with ST PWM
controllers, the driver allows implementing
complete voltage regulator solutions for modern
high-current CPUs. L6741 embeds high-current
drivers for both high-side and low-side
MOSFETS. The device accepts flexible power
supply (5V to 12V) to optimize the gate-drive
voltage for High-Side and Low-Side maximizing
the System Efficiency.
The Bootstrap diode is embedded saving the use
of external diodes. Anti shoot-through
management avoids high-side and low-side
mosfet to conduct simultaneously and, combined
with Adaptive Dead-Time control, minimizes the
LS body diode conduction time.
L6741 embeds Preliminary OV Protection: after
Vcc overcomes the UVLO and while the device is
in HiZ, the Low-Side MOSFET is turned ON to
protect the load in case the output voltage
overcomes a warning threshold protecting the
load from High-Side MOSFET failures.
The driver is available is SOP8 package.
SO-8
Table 1. Device summary
Order code Package Packaging
L6741 SO-8 Tube
L6741TR SO-8 Tape & Reel
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