LM5051MA/NOPB

Overview

The LM5051MA/NOPB is a low-side OR-ing FET controller manufactured by Texas Instruments. It operates within a supply voltage range of 36 V to 100 V and supports a single channel. The device features an operating quiescent current of 690 uA and includes a 1 A current limit. It is designed for surface mount installation in SOIC-8 packages and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Provides control for low-side OR-ing applications using external N-channel MOSFETs
• Integrates charge pump gate drive circuitry for efficient high-side switching control
• Includes built-in current limiting protection with a specified 1 A threshold

Applications

• Redundant power distribution networks requiring low loss rectification
• Hot-swap systems utilizing low-side topology for module insertion
• Industrial power management architectures needing precise current limiting

Procurement Notes

Verify the specific suffix NOPB indicates lead-free compliance and RoHS adherence as per manufacturer standards. Confirm the SOIC-8 package variant matches your PCB footprint requirements. Ensure the 36V minimum operating voltage aligns with your system's rail specifications before finalizing procurement orders.

Selection Notes

Select this component when designing low-side redundancy solutions rather than high-side configurations. The 36V minimum supply voltage requires careful consideration of input rail stability. Evaluate the 690 uA quiescent current against system standby power constraints to ensure efficiency targets are met during idle operations.

Part Context

This part belongs to the LM5051 series of hot swap voltage controllers from Texas Instruments. It serves as a specialized PMIC solution for managing power switches in complex electronic systems. The device complements other TI power management ICs by providing dedicated control logic for external field-effect transistors.

Replacement Considerations

LM5051MAE/NOPB is a documented alternative within the same product family offering similar functional characteristics.