LM5050Q1MK-1/NOPB

Overview

The LM5050Q1MK-1/NOPB is a high-side OR-ing FET controller designed for automotive applications, featuring AEC-Q100 qualification. It operates with an input voltage range of 5 V to 75 V and withstands transient voltages up to 100 V. The device provides charge pump gate drive for external N-channel MOSFETs and includes a fast-response comparator to turn off the FET during reverse current flow. Key electrical parameters include a maximum supply current of 400 uA, a channel count of one, and an operating temperature range from -40 C to +150 C. It is housed in a SOT-23-Thin-6 package.

Feature Summary

• Provides high-side OR-ing control for redundant power distribution networks using external N-channel MOSFETs
• Integrates a charge pump to drive the gate of the external MOSFET for low on-resistance operation
• Features a fast-response comparator that actively turns off the MOSFET when reverse current flow is detected

Applications

• Automotive redundant power systems requiring hot-swap capabilities
• N+1 power redundancy configurations in vehicle electronics
• Ideal diode rectifier replacement in power distribution networks

Procurement Notes

Verify the specific suffix MK-1 against the official Texas Instruments datasheet to confirm pinout and functional compatibility. Ensure the component meets AEC-Q100 requirements for your target automotive application. Cross-reference the package type SOT-23-Thin-6 with your PCB footprint design. Confirm that the 75 V maximum supply voltage aligns with your system's transient voltage specifications.

Selection Notes

Select this controller when designing automotive power architectures that require precise load sharing between multiple voltage sources. It is suitable for applications needing protection against reverse current flow without the voltage drop associated with traditional diodes. Consider the 400 uA supply current for low-power standby modes. Evaluate the thermal performance within the specified -40 C to +150 C operating range for harsh automotive environments.

Part Context

This part belongs to the LM5050 series of high-side OR-ing controllers from Texas Instruments. It is specifically qualified for automotive use under the Q1 designation. The series is designed to replace diodes in power distribution networks, offering improved efficiency by reducing conduction losses through active MOSFET control.

Replacement Considerations

LM5050MK-1/NOPB