LM5105SDX

Gate Driver Overview

The LM5105SDX is a half-bridge gate driver IC designed for synchronous MOSFET applications. It features non-inverting inputs and supports N-channel MOSFETs with peak source and sink currents of 1.8A each. The device operates within a supply voltage range of 8V to 14V and withstands high-side bootstrap voltages up to 118V. Typical rise and fall times are 15ns. It is housed in a 10-WSON (4x4) package with an exposed pad, suitable for surface mount mounting. The operating junction temperature range extends from -40°C to 125°C.

Gate Driver Feature Summary

• Provides robust drive capability for synchronous half-bridge configurations using dual non-inverting inputs.
• Supports high-voltage operation with a maximum high-side bootstrap voltage rating of 118V.
• Delivers symmetrical peak output currents of 1.8A for both sourcing and sinking to ensure fast switching transitions.

Gate Driver Applications

• Synchronous buck converter topologies
• Half-bridge power stage driving
• Industrial motor control systems

Gate Driver Procurement Notes

Verify the specific suffix requirements when ordering, as the LM5105SDX without the NOPB suffix may indicate lead-free status variations compared to the LM5105SDX/NOPB variant. Confirm RoHS compliance and packaging options such as tape and reel or cut tape directly with the manufacturer or authorized distributors to ensure alignment with assembly specifications.

Gate Driver Selection Notes

Select this component for designs requiring a compact half-bridge driver with high voltage tolerance and moderate current drive capabilities. Ensure the logic input voltage levels align with the specified VIL and VIH thresholds. Consider the thermal performance of the 10-WSON package with exposed pad for adequate heat dissipation in high-frequency switching applications.

Gate Driver Part Context

The LM5105 belongs to Texas Instruments' family of high-voltage half-bridge gate drivers. It shares functional similarities with the LM5106 but differs in specific drive current characteristics. This series is engineered for efficient power conversion, offering a balance between switching speed and electromagnetic interference reduction through controlled slew rates.

Gate Driver Replacement Considerations

The LM5105SD/NOPB is a direct replacement for the LM5105SDX, offering identical functionality with updated manufacturing standards. Verify pin compatibility and electrical parameters before substitution.