The LM5109 is a low cost high voltage gate driver, designed to drive both the high side and the low side N-Channel MOSFETs in a synchronous buck or a half bridge configuration. The floating high-side driver is capable of working with rail voltages up to 100V. The outputs are independently controlled with TTL compatible input thresholds. A robust level shifter technology operates at high speed while consuming low power and providing clean level transitions from the control input logic to the high side gate driver. Under-voltage lockout is provided on both the low side and the high side power rails. The device is available in the SOIC-8 and the thermally enhanced LLP-8 packages.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM5109 100V / 1A Peak Half Bridge Gate Driver datasheet | Apr 26, 2005 | |
| Application note | Using Half-Bridge Gate Driver to Achieve 100% Duty Cycle for High Side FET | PDF | HTML | Mar 25, 2024 | |
| Application note | Bootstrap Circuitry Selection for Half Bridge Configurations (Rev. A) | PDF | HTML | Sep 8, 2023 | |
| Application note | Comparative Analysis of Two Different Methods for Gate-Drive Current Boosting (Rev. A) | PDF | HTML | Feb 17, 2022 | |
| Application brief | External Gate Resistor Selection Guide (Rev. A) | Feb 28, 2020 | ||
| Application brief | Understanding Peak IOH and IOL Currents (Rev. A) | Feb 28, 2020 | ||
| White paper | Power Electronics in Motor Drives: Where is it? (Rev. A) | Oct 1, 2019 | ||
| More literature | Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) | Oct 29, 2018 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
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