L6743DTR

Overview

The L6743DTR is a high-current MOSFET driver manufactured by STMicroelectronics, designed for driving external power switches in voltage regulator applications. It features two independent drivers configured for high-side and low-side operation, supporting synchronous rectification topologies. The device operates with a minimum supply voltage of 10.2 V and delivers an output current capability of 3 A per channel. With a typical operating supply current of 5 mA and power dissipation rated at 1.15 W, it integrates protection mechanisms suitable for modern high-current CPU and GPU power stages when paired with compatible PWM controllers.

Feature Summary

• Dual-channel architecture providing independent high-side and low-side gate drive capabilities
• High peak output current delivery to ensure fast switching transitions
• Integrated protection features including under-voltage lockout and thermal shutdown

Applications

• Voltage regulator modules (VRMs) for high-current CPUs
• GPU power supply circuits
• Synchronous buck converter designs

Procurement Notes

Verify the specific suffix 'DTR' indicates the tape-and-reel packaging configuration as distinct from the 'D' or 'DST' variants which may use different packaging formats. Confirm that the ordering part number matches the exact package style required for the PCB layout. Ensure compatibility with the intended PWM controller logic levels before procurement.

Selection Notes

Select this component when designing synchronous buck converters requiring robust gate drive performance for high-current loads. It is appropriate for applications where integrated protection against over-temperature and under-voltage conditions is necessary. Consider the 10.2 V minimum supply requirement to ensure proper operation within the target system's voltage rails.

Part Context

This component belongs to the L6743 series of high-current MOSFET drivers from STMicroelectronics. The series is engineered to complement ST PWM controllers, forming complete solutions for demanding power management tasks. The DTR variant specifically denotes the reel-packaged version of the standard L6743D device, maintaining identical electrical characteristics while differing in shipping format.

Replacement Considerations

The L6743D is the non-reel equivalent offering identical electrical specifications. Verify pinout compatibility if substituting with other high-side/low-side drivers from different manufacturers.