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L6743Q データシート(PDF) 1 Page - STMicroelectronics

部品番号 L6743Q
部品情報  High current MOSFET driver
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6743Q データシート(HTML) 1 Page - STMicroelectronics

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August 2007
Rev 1
1/17
1
L6743
L6743Q
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: 5V to 12V compatible
High-impedance (HiZ) management for output
stage Shutdown
Preliminary OV protection
SO-8 and DFN10 3x3 packages
Applications
High current VRM / VRD for Desktop / Server /
Workstation CPUs
High current and high efficiency DC / DC
converters
Description
L6743, L6743Q 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 and
DCDC conversion in general. L6743, L6743Q
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.
L6743, L6743Q embeds Preliminary OV
Protection: after Vcc overcomes the UVLO and
while the device is in HiZ, the LS MOSFET is
turned ON to protect the load in case the output
voltage overcomes a warning threshold protecting
the output against HS failures.
The driver is available is SO8 and DFN10 3x3
packages
SO-8
DFN10 3x3
Table 1.
Device summary
Order code
Package
Packaging
L6743
SO-8
Tube
L6743TR
SO-8
Tape & Reel
L6743Q
DFN10
Tube
L6743QTR
DFN10
Tape & Reel
www.st.com


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