LM5111-3MX/NOPB

Overview

The LM5111-3MX/NOPB is a dual low-side gate driver manufactured by Texas Instruments, formerly National Semiconductor. It features a compound driver architecture with independent high and low current stages to optimize switching performance. The device operates within a supply voltage range of 3.5 V to 14 V and supports peak output currents of 3 A for the high-current stage and 5 A for the low-current stage. It utilizes an 8-pin MSOP PowerPAD package and functions reliably across a temperature range of -40 °C to 125 °C.

Feature Summary

• Dual-channel low-side gate driver configuration
• Compound driver architecture with separate high and low current stages
• Independent control of rise and fall times via external resistors

Applications

• Synchronous buck converter applications
• Low-side MOSFET driving in DC-DC converters
• General-purpose power management circuits requiring fast switching

Procurement Notes

Verify the manufacturer designation as Texas Instruments, noting the historical National Semiconductor lineage. Confirm the specific suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the package type matches the required 8-MSOP-PowerPAD footprint for PCB layout compatibility.

Selection Notes

Select this component when a compact dual low-side driver with adjustable switching speeds is required. The compound driver design allows for reduced EMI by controlling dv/dt and di/dt independently. Consider the 8-MSOP PowerPAD package for thermal dissipation requirements in space-constrained designs.

Part Context

This part belongs to the LM5111 series of gate drivers from Texas Instruments. The series includes variants such as LM5111-1MY and LM5111-2M/NOPB, which differ in pinout or packaging but share the core compound driver technology designed for efficient low-side switching applications.

Replacement Considerations

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