LM5050MK-2/NOPB

Overview

The LM5050MK-2/NOPB is a high-side OR-ing FET controller designed for N+1 redundancy applications. It operates with external N-channel MOSFETs to replace diode rectifiers, reducing power loss and voltage drop in power distribution networks. The device supports input voltages from 6V to 75V and withstands transient voltages up to 100V. Key electrical parameters include a supply current of 355 µA, an off-delay time of 450 ns, and operation within a temperature range of -40°C to +125°C. It is housed in a SOT-23-THIN (TSOT-23-6) package.

Feature Summary

• Provides charge pump gate drive for external N-channel MOSFETs
• Features fast response comparator to turn off FET during reverse current flow
• Supports N:1 input-to-output ratio for redundant power architectures

Applications

• Redundant power supplies
• Power distribution networks requiring ideal diode replacement
• High-side OR-ing configurations

Procurement Notes

Verify the specific suffix 'MK' indicates the tape and reel packaging variant distinct from the tube-packaged 'LM5050MK'. Confirm RoHS compliance status as indicated by the '/NOPB' designation. Ensure the selected component matches the required N+1 controller topology rather than single-channel variants. Cross-reference the manufacturer part number against official Texas Instruments documentation to confirm availability and lead times prior to ordering.

Selection Notes

Select this component when designing systems requiring high-side redundancy with N+1 architecture. It is suitable for applications needing to minimize conduction losses compared to traditional diode-based solutions. Consider the 6V to 75V operating range and 100V transient tolerance when defining system voltage levels. The SOT-23-THIN package is appropriate for space-constrained designs requiring surface-mount installation.

Part Context

This part belongs to the LM5050 family of OR-ing controllers from Texas Instruments. It specifically addresses high-side switching requirements using external N-channel MOSFETs. The device complements other variants like the LM5050-1 and LM5051, offering specialized functionality for multi-input redundancy scenarios where seamless source switching is critical for system uptime.

Replacement Considerations

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