LM5050MK-1/NOPB

Overview

The LM5050MK-1/NOPB is a high-side OR-ing FET controller designed to work with external N-channel MOSFETs. It functions as an ideal diode rectifier when placed in series with power supplies, replacing standard diodes to reduce power loss and voltage drop. The device provides charge pump gate drive for the external MOSFET and features a fast-response comparator that turns off the FET during reverse current flow. It supports input voltages from 5V to 75V and withstands transient voltages up to 100V. Key electrical parameters include a supply current of 130µA, a shutdown delay time of 486ns, and an operating temperature range of -40°C to +125°C.

Feature Summary

• Provides charge pump gate drive for external N-channel MOSFETs to enable low-loss power path control.
• Integrates a fast-response comparator to actively turn off the MOSFET when reverse current flow occurs.
• Supports wide input voltage ranges from 5V to 75V with robust transient voltage handling capabilities.

Applications

• Redundant power supply systems
• Ideal diode rectification in power distribution networks
• High-side switching applications requiring low forward voltage drop

Procurement Notes

Verify the specific package variant, as the base part number may correspond to tube or tape-and-reel packaging depending on the suffix. Confirm RoHS compliance status and ensure the selected component matches the required thermal and electrical specifications for the target application environment before finalizing procurement orders.

Selection Notes

Select this controller when designing systems that require N+1 redundancy or ideal diode functionality using discrete MOSFETs. Ensure the external MOSFET selected can handle the expected load current and voltage ratings. Consider the 486ns shutdown delay time when evaluating protection requirements against reverse current events in the specific circuit topology.

Part Context

This component belongs to the LM5050 family of OR-ing controllers manufactured by Texas Instruments. It is specifically engineered for high-side power management applications where minimizing conduction losses is critical. The device serves as a core control element in modern power distribution architectures, enabling efficient power routing and protection without the inherent voltage drops associated with traditional diode-based solutions.

Replacement Considerations

LM5050MKX-1/NOPB