L6743| Datasheet

L6743, L6743Q

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L6743, L6743Q
High current MOSFET driver
Data Brief

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 SO8 and DFN10 3x3 Package 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 gatedrive 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.
SO8, DFN10 3x3

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 dualdriver specifically designed to drive N-Channel MOSFETs connected in Synchronous-Rectified Buck topology.

Table 1.

Device summary
Part Number L6743 L6743TR L6743Q L6743QTR Package SO8 SO8 DFN10 DFN10 Rev 1 Packaging Tube Tape & Reel Tube Tape & Reel 1/8
www.st.com 8

March 2007

For further information contact your local STMicroelectronics sales office.