LM5111-3M/NOPB

Overview

The LM5111-3M/NOPB is a dual low-side gate driver from Texas Instruments designed for driving N-channel MOSFETs. It features two independent inverting drivers with peak output currents of 5 A and 3 A respectively. The device operates within a supply voltage range of 3.5 V to 14 V and supports logic input thresholds compatible with TTL levels. It provides fast switching performance with rise and fall times of 14 ns and 12 ns, ensuring efficient control in power conversion applications.

Feature Summary

• Dual channel configuration providing independent low-side drive capabilities
• Inverting logic interface for straightforward control signal integration
• Robust output stage capable of sourcing and sinking high peak currents

Applications

• Synchronous buck converter designs
• Half-bridge and full-bridge power stages
• Isolated DC-DC converter topologies

Procurement Notes

Verify the specific suffix '3M' against the official datasheet to confirm pinout and electrical characteristics match the design requirements. Ensure the operating temperature range of -40°C to +125°C aligns with the thermal environment. Confirm RoHS compliance status as indicated by the NOPB suffix before finalizing procurement.

Selection Notes

Select this component when dual low-side driving is required with asymmetric current needs. The 5A/3A split allows optimization for different MOSFET gate charges. Consider the SOIC-8 or MSOP package options based on PCB space constraints and thermal dissipation requirements relative to higher current alternatives.

Part Context

Part of the LM5111 series, which focuses on cost-effective, high-performance gate driving solutions. This series targets industrial and consumer power supplies where compact size and reliable switching are critical. The LM5111-3M variant specifically addresses applications needing distinct drive strengths for parallel or differently sized FETs.

Replacement Considerations

LM5111-2M/NOPB offers symmetric 5A outputs. LM5111-2MX/NOPB provides similar functionality in an SOIC-8 package. Verify pin compatibility and current ratings before substitution.