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L6743Q Datasheet(PDF) 1 Page - STMicroelectronics |
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L6743Q Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 17 page  August 2007 Rev 1 1/17 1 L6743 L6743Q High current MOSFET driver 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: 5V to 12V compatible ■ High-impedance (HiZ) management for output stage Shutdown ■ Preliminary OV protection ■ SO-8 and DFN10 3x3 packages Applications ■ High current VRM / VRD for Desktop / Server / Workstation CPUs ■ High current and high efficiency DC / DC converters Description L6743, L6743Q 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 DCDC conversion in general. L6743, L6743Q embeds high-current drivers for both high-side and low-side MOSFETS. The device accepts flexible power supply (5V to 12V) 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. L6743, L6743Q 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 SO8 and DFN10 3x3 packages SO-8 DFN10 3x3 Table 1. Device summary Order code Package Packaging L6743 SO-8 Tube L6743TR SO-8 Tape & Reel L6743Q DFN10 Tube L6743QTR DFN10 Tape & Reel www.st.com |
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