LM1771TSD/NOPB

DC DC Switching Controllers Overview

The LM1771TSD/NOPB is a low-voltage synchronous buck controller designed for step-down applications. It features constant on-time control mode and supports up to 6A output current with a maximum duty cycle of 98%. The typical quiescent current is 0.4 mA. Operating temperature range spans from -40°C to 125°C TJ. The device provides positive output configuration via transistor driver outputs. It operates without clock synchronization and is available in bulk packaging.

DC DC Switching Controllers Feature Summary

• Synchronous step-down topology for efficient voltage conversion
• Constant on-time control mode for stable operation
• Integrated enable function for power management

DC DC Switching Controllers Applications

• Low-voltage DC-DC conversion systems
• Embedded power supply designs
• Industrial control equipment

DC DC Switching Controllers Procurement Notes

Verify the manufacturer designation, as National Semiconductor assets are managed by Texas Instruments. Confirm the NOPB suffix indicates lead-free compliance. Ensure the TSD package type matches your PCB layout requirements. Check active status through authorized distributors to avoid counterfeit components. Validate datasheet revisions for accurate electrical specifications before integration.

DC DC Switching Controllers Selection Notes

Choose this component for applications requiring low-voltage synchronous buck regulation with constant on-time control. Consider the 6A current capability and 98% duty cycle for high-efficiency designs. Evaluate the -40°C to 125°C operating range for environmental suitability. Compare quiescent current requirements against system power budgets. Ensure compatibility with external MOSFETs for the synchronous rectification stage.

DC DC Switching Controllers Part Context

This part belongs to the LM1771 family of low-voltage synchronous buck controllers. It is manufactured under National Semiconductor, now part of Texas Instruments. The NOPB suffix denotes lead-free packaging compliant with RoHS standards. The TSD identifier specifies the surface-mount package type used for this specific variant.