L6743B

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High current MOSFET driver

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  • L6743B 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 DC-DC conversion in general. L6743B embeds high-current drivers for both high-side andlow-side MOSFETs. The device accepts flexible power supply (5 V to 12 V) 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.
    L6743B 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 VFDFPN8 3 x 3 mm packages.

    Key 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 OV protection
    • VFDFPN8 3 x 3 mm package

Circuit Diagram

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6743BTR
Active
QFN-8L P 0.5 mm Industrial Ecopack2

L6743BTR

Package:

QFN-8L P 0.5 mm

Material Declaration**:

PDF XML

Marketing Status

Active

Package

QFN-8L P 0.5 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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

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L6743BTR Available at 1 distributors

Distributor availability ofL6743BTR

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 4000 0 Order Now

Distributor reported inventory date: 2021-01-19

Distributor Name

AVNET

Stock

4000

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-01-19

Buy Direct
Active
EAR99 NEC Tape And Reel QFN-8L P 0.5 mm 0 125 PHILIPPINES 0.5736 / 1k

L6743BTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5736 / 1k

Distributor availability ofL6743BTR

Distributor Name
Region Stock Min. Order Third party link
AVNET AMERICA 4000 0 Order Now

Distributor reported inventory date: 2021-01-19

Distributor Name

AVNET

Stock

4000

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-01-19

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFN-8L P 0.5 mm

Operating Temperature (°C)

(min)

0

(max)

125

Budgetary Price (US$)* / Qty

0.5736 / 1k

Country of Origin

PHILIPPINES

(*) 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