L6747C Datasheet, PDF (1/15 Pages) STMicroelectronics – High current MOSFET driver

L6747C
High current MOSFET driver
Features
■ Dual MOSFET driver for synchronous rectified
converters
■ High driving current for fast external MOSFET
switching
■ 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 L6747C 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
VFDFPN8 3x3 mm
regulator solutions for modern high-current CPUs
and for DC-DC conversion in general.
The L6747C 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
efficiency.
Anti shoot-through management prevents the
high-side and low-side MOSFETs from
conducting simultaneously and, combined with
adaptive dead-time control, minimizes the LS
body diode conduction time.
The L6747C features preliminary OV protection to
protect the load from dangerous overvoltage due
to MOSFET failures at startup.
The driver is available in a VFDFPN8 3x3 mm
package.
Table 1.
Device summary
Order codes
L6747C
L6747CTR
Package
VFDFPN8
VFDFPN8
Packing
Tube
Tape and reel
April 2010
Doc ID 17127 Rev 1
1/15
www.st.com
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