LM5111-3MY/NOPB

Overview

The LM5111-3MY/NOPB is a dual-channel compound gate driver from Texas Instruments, housed in an 8-pin MSOP-PowerPAD package. It provides independent low-side drive with peak output currents of 5A source and 3A sink per channel. The device operates within a supply voltage range of 3.5V to 14V and supports logic input thresholds of 0.8V (VIL) and 2.2V (VIH). Propagation delays are characterized by rise times of 14ns and fall times of 12ns. It functions as an inverting driver and is rated for junction temperatures between -40°C and +125°C.

Feature Summary

• Dual independent low-side gate driver channels
• Compound output stage providing asymmetric current capability
• Integrated bootstrap diode functionality
• Robust thermal performance via exposed pad design

Applications

• Synchronous buck converter switching control
• Half-bridge and full-bridge power stages
• Isolated DC-DC converter gate driving
• High-frequency motor drive applications

Procurement Notes

Verify the specific suffix '3MY' against the official datasheet to confirm pinout and internal configuration differences compared to standard variants. Ensure the ordering part number matches the exact package type and tape/reel specifications required for your assembly process. Cross-reference the manufacturer's latest documentation to confirm active status and compliance details before finalizing procurement.

Selection Notes

Select this component when asymmetric drive strength is required for optimizing switching speed versus conduction losses in synchronous rectification. The 5A source current aids in fast turn-on, while the 3A sink current manages turn-off effectively. Consider the MSOP-PowerPAD package for space-constrained designs requiring improved thermal dissipation through the bottom pad connection.

Part Context

The LM5111 belongs to Texas Instruments' family of dedicated MOSFET gate drivers designed for high-efficiency power management. Unlike simple buffers, it offers optimized current delivery tailored for driving power switches directly. This specific variant integrates necessary bootstrap components to simplify circuit topology in floating high-side or low-side configurations where self-supply is needed.

Replacement Considerations

Direct substitutes include the LM5111-2MX/NOPB, which shares similar electrical characteristics but may differ in packaging or specific internal configuration details. Verify that any replacement maintains the same 8-pin MSOP-PowerPAD footprint and compatible pin assignments to ensure board-level interchangeability without redesign.