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Part No L6743D
Manufacturer STMicroelectronics
Catalog PMIC - Gate Drivers
Description High current MOSFET driver | IC MOSFET DRIVER DUAL 8SOIC

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Pricing & Ordering $0.7048 Historical reference price : is the price that a customer announces that it is willing to pay for this component in the previous period, only for reference.
Unit Price
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Availability: 15,000 pieces
MOQ: 50 pcs
Order Increment : 1 pcs
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Products specifications

Categories Integrated Circuits
Manufacturer STMicroelectronics
Packaging Tube
Status Obsolete
Driven Configuration Half-Bridge
Channel Type Synchronous
Number of Drivers 2
Gate Type N-Channel MOSFET
Supply Voltage (V) 5V ~ 12V
Logic Voltage - VIL, VIH 0.8V, 2V
Current - Peak Output (Source, Sink) 2A, -
Input Type Non-Inverting
High Side Voltage - Max (Bootstrap) 41V
Temperature Range - Operating 0°C ~ 125°C
Mounting Style SMD
Manufacturer Package 8-SOIC
Supplier Device Package 8-SO
Family Part Number L6743
Manufacturer Pack Quantity 100
MSL Level 3 (168 Hours)
Win Source Part Number 1194455-L6743D
Manufacturer Homepage
Popularity Medium
Fake Threat In the Open Market 55 pct.
Supply and Demand Status Limited


The L6743D is a versatile and robust integrated circuit designed by STMicroelectronics, a global semiconductor leader known for its innovative and high-performance products. This advanced controller is specifically engineered to enhance the performance and reliability of DC-DC converters used in a wide range of applications.

Key Features

  • High-Efficiency Operation: The L6743D is optimized for synchronous rectification, ensuring high efficiency in DC-DC conversion which is critical for energy-sensitive applications.
  • Versatile Voltage Range: With an operating voltage range that accommodates various systems, the L6743D is suitable for a multitude of applications, from consumer electronics to industrial equipment.
  • Advanced Protection Features: The device includes over-current protection, over-voltage protection, and thermal shutdown, safeguarding the system against a wide array of potential faults.
  • Adjustable Switching Frequency: The L6743D allows for an adjustable switching frequency up to 1 MHz, providing flexibility to designers in optimizing their power supply design for performance or size.


The L6743D is ideal for use in:

  • Desktop and notebook power supplies
  • Point of Load (POL) converters
  • DC-DC modules for telecommunications and industrial systems

Technical Specifications

The L6743D boasts a range of technical specifications that make it a top choice for power supply designers:

  • Operating Voltage: 4.5V to 5.5V
  • Maximum Output Current: Adjustable
  • Switching Frequency: Up to 1 MHz (adjustable)
  • DrMOS-Compatible Driver
  • Package: VFQFPN 10 3x3 mm


The L6743D from STMicroelectronics is a powerful and flexible solution for modern DC-DC converter designs. With its combination of high efficiency, advanced protection features, and adjustable parameters, it stands out as an excellent choice for designers looking to create reliable and high-performance power supplies.

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