LM5050MKX-1/NOPB

Overview

The LM5050MKX-1/NOPB is an N+1 ORing controller manufactured by Texas Instruments, designed for redundant power systems. It operates with external N-channel MOSFETs to replace diode rectifiers in power distribution networks, reducing power loss and voltage drop. The device supports input voltages from 5V to 75V and withstands transient voltages up to 100V. Key electrical parameters include a supply current of 130 µA, a maximum operating temperature of 125°C, and a minimum operating temperature of -40°C. The part is housed in a SOT-23-THIN-6 package and features a turn-off delay time of 486 ns.

Feature Summary

• Provides gate drive for external N-channel MOSFETs to act as ideal diodes
• Detects reverse current flow to rapidly shut off the FET
• Enables lower power loss compared to traditional diode rectification

Applications

• Redundant power supply systems
• N+1 ORing configurations
• Power distribution networks requiring ideal diode replacement

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's latest datasheet to ensure compatibility with your design requirements. Confirm that the component meets all relevant environmental standards, such as RoHS compliance, before finalizing procurement. Cross-reference the manufacturer part number with distributor catalogs to validate availability and authenticity through authorized channels.

Selection Notes

Select this controller when designing redundant power architectures that require low forward voltage drop and high efficiency. Ensure the external N-channel MOSFET selected can handle the expected load current and voltage ratings. Consider the thermal performance and PCB layout constraints associated with the SOT-23-THIN-6 package during the integration phase.

Part Context

This component belongs to the LM5050 family of ORing controllers from Texas Instruments. It is specifically engineered for applications where multiple power sources must share the load or provide backup without back-feeding issues. The device simplifies the implementation of ideal diode circuits by integrating the necessary control logic and charge pump drivers.

Replacement Considerations

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