Product overview
Description
L6743B 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 DC-DC conversion in general. L6743B embeds high-current drivers for both high-side andlow-side MOSFETs. The device accepts flexible power supply (5 V to 12 V) 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.
L6743B 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 VFDFPN8 3 x 3 mm packages.
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All 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: 5 V to 12 V compatible
- High-impedance (HiZ) management for output stage shutdown
- Preliminary OV protection
- VFDFPN8 3 x 3 mm package
Circuit Diagram
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All resources
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Product Specifications (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 30 Jul 2019 | 30 Jul 2019 | |||
| 19 Sep 2016 | 19 Sep 2016 |
Flyers (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Nov 2020 | 23 Nov 2020 |
Brochures (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 07 Apr 2021 | 07 Apr 2021 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L6743B
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3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L6743BTR | Active | QFN-8L P 0.5 mm | Industrial | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L6743BTR | 1 distributors | Buy Direct | Active | EAR99 | NEC | Tape And Reel | QFN-8L P 0.5 mm | 0 | 125 | PHILIPPINES | 0.5736 / 1k | |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
