L6743BTR STMicroelectronics

L6743B High current MOSFET driver Features Dual MOSFET driver for synchronous rectified converters High driving current for fast external MOSFET switching Integrated bootstrap diode VFDFPN8 3 x 3 mm High frequency operation Enable pin Combined with ST PWM controllers, the driver allows implementing complete voltage regulator Adaptive dead-time management solutions for modern high-current CPUs and Flexible gate-drive: 5 V to 12 V compatible DC-DC conversion in general. L6743B embeds High-impedance (HiZ) management for output high-current drivers for both high-side and stage shutdown low-side MOSFETs. The device accepts flexible power supply (5 V to 12 V) to optimize the Preliminary OV protection gate-drive voltage for high-side and low-side VFDFPN8 3 x 3 mm package maximizing the system efficiency. The bootstrap diode is embedded saving the use Applications of external diodes. Anti shoot-through management avoids high-side and low-side High current VRM / VRD for desktop / server / MOSFET to conduct simultaneously and, workstation CPUs combined with adaptive dead-time control, High current and high efficiency DC / DC minimizes the LS body diode conduction time. converters L6743B embeds preliminary OV protection: after Vcc overcomes the UVLO and while the device is Description in HiZ, the LS MOSFET is turned ON to protect the load in case the output voltage overcomes a L6743B is a flexible, high-frequency dual-driver warning threshold protecting the output against specifically designed to drive N-channel HS failures. MOSFETs connected in synchronous-rectified buck topology. The driver is available is VFDFPN8 3 x 3 mm packages. Table 1. Device summary Order code Package Packing L6743B Tube VFDFPN8 L6743BTR Tape and reel July 2019 DS5863 Rev 2 1/17 This is information on a product in full production. www.st.comContents L6743B Contents 1 Typical application circuit and block diagram 3 1.1 Application circuit 3 1.2 Block diagram . 3 2 Pins description and connection diagrams 4 2.1 Pin description 4 3 Maximum ratings 5 3.1 Absolute maximum ratings . 5 3.2 Thermal data . 5 4 Electrical specifications 6 4.1 Electrical characteristics . 6 5 Device description and operation 7 5.1 High-impedance (HiZ) management . 8 5.2 Preliminary OV protection . 8 5.3 Internal BOOT diode . 9 5.4 Power dissipation 9 5.5 Layout guidelines . 11 6 Package mechanical data 13 7 Revision history . 16 2/17 DS5863 Rev 2