LM5106MMX

Overview

The LM5106MMX/NOPB is a high-voltage half-bridge gate driver designed for synchronous buck or half-bridge configurations. It drives high-side and low-side N-channel MOSFETs with a floating high-side driver supporting up to 100V rail voltage. The device features a single TTL-compatible control input, peak output currents of 1.2A source and 1.8A sink, and a bootstrap supply voltage range up to 118V DC. Key electrical parameters include an 8V UVLO threshold, typical rise/fall times of 15ns/10ns, and a fast shutdown propagation delay of 32ns. It operates within a junction temperature range of -40°C to 125°C.

Feature Summary

• Supports driving both high-side and low-side N-channel MOSFETs in synchronous topologies
• Features a single non-inverting input compatible with TTL logic levels
• Includes programmable turn-on delay for precise dead-time control via external resistor
• Integrates power rail undervoltage lockout to disable outputs during insufficient supply conditions

Applications

• Synchronous buck converter applications requiring high-side drive
• Half-bridge power stage configurations
• Industrial motor control systems utilizing N-channel MOSFETs
• Isolated gate drive circuits for medium-voltage power electronics

Procurement Notes

Verify the specific ordering suffix (e.g., MMX vs MM) against the manufacturer's current product status. The base model may be obsolete; confirm availability of the NOPB variant which meets RoHS standards. Ensure the package type matches the design footprint requirements. Cross-reference the datasheet revision date to ensure compatibility with latest electrical specifications and thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component when a robust half-bridge driver with integrated dead-time programming is required for N-channel MOSFETs. The device is suitable for designs needing a single-input control interface with TTL compatibility. Consider the 100V floating high-side capability and the specific peak current ratings (1.2A source, 1.8A sink) to ensure adequate drive strength for the target load capacitance. Verify that the VSSOP-10 package fits the available PCB space.

Part Context

The LM5106 series belongs to Texas Instruments' portfolio of high-voltage gate drivers. The LM5106MMX is the tape-and-reel version of the LM5106MM, housed in a VSSOP-10 package. It serves as a direct replacement for older National Semiconductor parts in the same family. The device is engineered for high-frequency switching applications where precise timing control and reliable high-side driving are critical for system efficiency and safety.

Replacement Considerations

LM5106MM/NOPB is a confirmed direct substitute offering RoHS compliance. Other family members like LM5105SD/NOPB provide similar functionality in different packages.