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Data sheet
LM5109A
- Drives Both a High-Side and Low-Side N-Channel MOSFET
- 1A peak Output Current (1.0A Sink / 1.0A Source)
- Independent TTL Compatible Inputs
- Bootstrap Supply Voltage to 108V DC
- Fast Propagation Times (30 ns Typical)
- Drives 1000 pF Load with 15ns Rise and Fall Times
- Excellent Propagation Delay Matching (2 ns Typical)
- Supply Rail Under-Voltage Lockout
- Low Power Consumption
- Pin Compatible with ISL6700
- Industry Standard SOIC-8 and Thermally Enhanced WSON-8 Package
The LM5109A is a cost effective, 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 90V. The outputs are independently controlled with TTL compatible input thresholds. The robust level shift 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 and the thermally enhanced WSON packages.
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Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5109A High Voltage 1A Peak Half Bridge Gate Driver datasheet (Rev. C) | PDF | HTML | 23 Sep 2016 |
| Application brief | External Gate Resistor Selection Guide (Rev. A) | 28 Feb 2020 | ||
| Application brief | Understanding Peak IOH and IOL Currents (Rev. A) | 28 Feb 2020 | ||
| More literature | Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) | 29 Oct 2018 | ||
| Application note | AN-1317 Selection of External Bootstrap Diode for LM510X Devices (Rev. B) | 04 May 2018 | ||
| EVM User's guide | AN-1299 LM5041 Evaluation Board (Rev. A) | 06 May 2013 | ||
| EVM User's guide | AN-1331 LM5033 Evaluation Board (Rev. A) | 06 May 2013 |
Design & development
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Reference designs
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TIDA-00476 is comprised of a single DC-DC power stage, which can work as a synchronous buck converter or a synchronous boost converter, enabling bidirectional power flow between DC power source and energy storage system. Operating in synchronous buck mode, the system works as a MPPT controlled (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |
| WSON (NGT) | 8 | Ultra Librarian |
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