LM27961TL/NOPB

Overview

The LM27961 is a high-efficiency, synchronous buck converter designed for automotive applications. It integrates two N-channel power MOSFETs and operates from an input voltage range of 4.5V to 60V. The device supports output currents up to 3A with adjustable switching frequencies from 100kHz to 2.2MHz. Key features include integrated bootstrap diode, soft-start, and comprehensive protection mechanisms such as overcurrent, overvoltage, and thermal shutdown.

Feature Summary

• Integrated synchronous rectification with internal bootstrap diode
• Wide input voltage range suitable for automotive loads
• Adjustable switching frequency for optimization of external components
• Comprehensive protection including cycle-by-cycle current limit and thermal shutdown

Applications

• Automotive infotainment systems
• ADAS sensor power supplies
• Body control modules
• Gateway nodes in vehicle networks

Procurement Notes

Verify the specific suffix NOPB indicates lead-free and RoHS compliance. Confirm the package type TL corresponds to the correct pinout and thermal characteristics for your PCB layout. Ensure the operating temperature range meets your application's environmental requirements. Cross-reference the datasheet revision date to ensure compatibility with latest design guidelines.

Selection Notes

Select this component when a wide input voltage range up to 60V is required in a compact footprint. Consider the adjustable frequency feature if minimizing passive component size is critical. Evaluate the thermal performance under maximum load conditions to determine adequate heatsinking or PCB copper area requirements.

Part Context

This part belongs to Texas Instruments' LM279xx family of automotive-grade buck converters. It is designed to replace older discrete solutions or less integrated controllers, offering higher efficiency and reduced board space. The device is qualified for AEC-Q100 standards, ensuring reliability in harsh automotive environments.

Replacement Considerations

Direct replacements may include other LM279xx variants with similar pinouts and electrical specifications. Verify that any substitute maintains the same input voltage range and output current capability. Check for compatibility with existing control loops and protection thresholds before implementation.