LM5106MMX/NOPB

Overview

The LM5106MMX/NOPB is a high-voltage half-bridge gate driver designed to drive high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations. It features a floating high-side driver capable of operating at rail voltages up to 100V, with a bootstrap voltage range extending to 118V DC. The device provides peak output currents of 1.2A source and 1.8A sink. It utilizes a single non-inverting input compatible with TTL logic levels and includes an enable pin. Key electrical parameters include a supply voltage range of 8V to 14V, typical rise and fall times of 15ns and 10ns respectively for a 1000pF load, and a fast shutdown propagation delay of approximately 32ns. Undervoltage lockout disables the drivers when supply rails fall below thresholds.

Feature Summary

• Capable of driving high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge topologies
• Features a floating high-side driver supporting bootstrap operation up to 118V DC
• Includes programmable turn-on delay for dead-time control via a single external resistor
• Integrates undervoltage lockout to disable outputs when power rails are insufficient

Applications

• Synchronous buck converter applications requiring high-side and low-side gate drive
• Half-bridge power conversion circuits
• High-voltage motor drive systems utilizing N-channel MOSFETs
• Industrial power supplies with wide input voltage ranges

Procurement Notes

Verify the package type matches your PCB footprint; this specific suffix indicates a VSSOP-10 package. Confirm RoHS compliance status as older variants may differ. Check for direct replacement availability if lead times are critical, as manufacturing statuses can change. Ensure the ordering suffix aligns with your required tape-and-reel specifications. Validate that the 100V rating meets your circuit's maximum rail voltage requirements.

Selection Notes

Select this component when a robust half-bridge driver is needed for N-channel MOSFETs in high-voltage environments. It is suitable for designs requiring precise dead-time programming and fast switching speeds. Consider the VSSOP-10 package constraints regarding thermal dissipation and board space. Ensure the input logic levels match your controller's output voltage. Verify that the bootstrap capacitor selection supports the required duty cycle and frequency.

Part Context

This part belongs to the LM5106 family of high-voltage gate drivers from Texas Instruments. It shares core functionality with other variants like the LM5106SDX/NOPB but differs in packaging. The MMX/NOPB suffix specifically denotes the VSSOP-10 plastic package with lead-free and halogen-free construction. It serves as a bridge between standard low-voltage drivers and more complex integrated power stages.

Replacement Considerations

LM5106MM/NOPB is listed as a direct replacement for the non-NOPB version.