L6743, L6743Q is a high-current MOSFET driver designed by STMicroelectronics. It features high driving current, high frequency, high efficiency and more. It is suitable for high-current VRM/VRD for desktop/server/workstation CPUs as well as high-current and high-efficiency DC/DC converters.
The L6743 and L6743Q are flexible, high-frequency dual drivers specifically designed to drive N-channel MOSFETs connected in synchronous-rectified buck topology. These devices embed high-current drivers for both high-side and low-side MOSFETs and accept a flexible power supply ranging from 5 V to 12 V to optimize gate-drive voltage.
| Supply voltage range | 5 V to 12 V |
|---|
The integrated bootstrap diode saves the use of external diodes in the circuit design.
Pulling the EN pin low causes the driver to enter the high-impedance (HiZ) state with all MOSFETs OFF.
It minimizes the Low-Side body diode conduction time to maintain good efficiency.