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L6747A Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6747A
Description  High current MOSFET driver
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6747A Datasheet(HTML) 1 Page - STMicroelectronics

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March 2010
Doc ID 17126 Rev 1
1/15
15
L6747A
High current MOSFET driver
Features
Dual MOSFET driver for synchronous rectified
converters
High driving current for fast external MOSFET
switching
Integrated bootstrap diode
High frequency operation
Enable pin
Adaptive dead-time management
Flexible gate-drive: 5 V to 12 V compatible
High-impedance (HiZ) management for output
stage shutdown
Preliminary overvoltage (OV) protection
VFDFPN8 3x3 mm package
Applications
High current VRM / VRD for desktop / server /
workstation CPUs
High current and high efficiency DC-DC
converters
Description
The L6747A 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 the implementation of complete voltage
regulator solutions for modern high-current CPUs
and for DC-DC conversion in general.
The L6747A embeds high-current drivers for both
high-side and low-side MOSFETS. The device
accepts a flexible power supply of 5 V to 12 V.
This allows optimization of the high-side and low-
side gate-drive voltage to maximize system effi-
ciency.
The embedded bootstrap diode eliminates the
need for external diodes. Anti shoot-through man-
agement prevents the high-side and low-side
MOSFETs from conducting simultaneously and,
combined with adaptive dead-time control, mini-
mizes the LS body diode conduction time.
The L6747A features preliminary OV protection to
protect the load from dangerous overvoltage due
to MOSFET failures at startup.
The L6747A device is available in a VFDFPN8
3x3 mm package.
VFDFPN8 3x3 mm
Table 1.
Device summary
Order code
Package
Packing
L6747A
VFDFPN8
Tube
L6747ATR
VFDFPN8
Tape and reel
www.st.com


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