FAN5109MX

Gate Driver Overview

The FAN5109MX is a dual high-frequency MOSFET driver designed for N-Channel power MOSFETs in synchronous-rectified buck converters. It features a non-inverting logic interface and operates within a supply voltage range of 10V to 13.5V. The device supports an input low voltage (VIL) of 0.8V and input high voltage (VIH) of 2V. Typical rise and fall times are 25ns and 15ns, respectively. It is housed in an 8-SOIC package with a width of 3.90mm and functions as a half-bridge gate driver.

Gate Driver Feature Summary

• Dual high-frequency driver architecture optimized for synchronous-rectified buck converter applications
• Non-inverting logic interface compatible with standard digital control signals
• Integrated bootstrap capability for driving high-side N-channel MOSFETs

Gate Driver Applications

• Synchronous-rectified buck converters
• High-frequency DC-DC power conversion stages
• Half-bridge gate drive circuits

Gate Driver Procurement Notes

Verify the manufacturer designation carefully, as Rochester Electronics may distribute this part number alongside onsemi or Fairchild Semiconductor sources. Confirm the specific suffix indicates the SOIC-8 package and lead-free status. Ensure the component matches the original Fairchild Semiconductor specifications for electrical parameters such as peak output current and operating temperature range before integration into design.

Gate Driver Selection Notes

Select this component when designing synchronous buck converters requiring dedicated high-side and low-side gate drive capabilities. The non-inverting configuration simplifies control logic interfacing. Verify that the 10V to 13.5V supply range aligns with the system's available rail. Consider the 8-SOIC footprint constraints and thermal performance requirements for the target application environment.

Gate Driver Part Context

The FAN5109 series belongs to the family of high-speed MOSFET drivers intended for power management applications. While originally associated with Fairchild Semiconductor, distribution channels may include Rochester Electronics for surplus or discontinued stock. The MX suffix typically denotes the tape-and-reel packaging variant in the SOIC-8 form factor, distinguishing it from bulk or other package options.

Gate Driver Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.