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  • L6743D 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. L6743D embeds high-current drivers for both high-side and lowside MOSFETS. The device accepts flexible power supply (5 V to 12 V) to optimize the gatedrive 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.
    L6743D 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 package.

    Key Features

    • SO8 package
    • Preliminary OV protection
    • Flexible gate-drive: 5 V to 12 V compatible
    • Adaptive dead-time management
    • Dual MOSFET driver for synchronous rectified converters
    • Integrated bootstrap diode
    • High driving current for fast external MOSFET switching
    • Enable pin
    • High-impedance (HiZ) management for output stage shutdown
    • High frequency operation

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS6010
      High current MOSFET driver
      1.1
      417.52 KB
      PDF
      DS6010

      High current MOSFET driver

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6743D
NRND
SO-8 Industrial Ecopack1

L6743D

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
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Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6743D No availability of distributors reported, please contact our sales office
NRND
EAR99 NEC Tube SO-8 0 125 MOROCCO

L6743D

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-8

Operating Temperature (°C)

(min)

0

(max)

125

Budgetary Price (US$)* / Qty

Country of Origin

MOROCCO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors