LM5177DCPR

Overview

The LM5177DCPR is a wide input voltage bidirectional four-switch buck-boost controller manufactured by Texas Instruments. It operates with an input voltage range from 3.5 V to 60 V, supporting output voltages between 3.3 V and 60 V. The device integrates two high-voltage supply LDOs and features a 2-A peak current logic level gate driver with integrated bootstrap diode. It supports switching frequencies up to 600 kHz and includes spread spectrum operation for EMI reduction. Key control features include dynamic output voltage tracking, power save mode, and hiccup overcurrent protection.

Feature Summary

• Bidirectional four-switch buck-boost topology enabling seamless transition between buck, boost, and buck-boost modes
• Integrated 2-A peak current logic level gate driver with bootstrap overvoltage and undervoltage protection
• Dynamic output voltage tracking capability for PWM or analog input signals
• Low shutdown quiescent current of 3 μA and low operating quiescent current of 60 μA

Applications

• Non-isolated DC/DC supplies for remote radio units and industrial PCs
• Backup power systems including battery backup and fire safety applications
• Motor drive control systems requiring wide input voltage ranges

Procurement Notes

Verify the exact part number suffix against official Texas Instruments documentation to ensure correct package type and temperature rating. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement. Ensure ordering quantities align with manufacturer packaging specifications. Cross-reference datasheet revisions to confirm feature availability and electrical characteristics match design requirements.

Selection Notes

Select this component when designing non-isolated DC/DC converters requiring wide input voltage ranges up to 60 V. It is suitable for applications needing bidirectional power flow and precise current limiting. Consider the HTSSOP-38 package constraints and thermal performance during layout. Evaluate the need for external clock synchronization versus internal fixed frequency operation based on system EMI requirements.

Part Context

The LM5177 belongs to Texas Instruments' family of wide VIN bidirectional buck-boost controllers. It is designed for high-efficiency power conversion in industrial and communication equipment. The device complements other PMIC solutions by offering integrated gate drivers and advanced protection features within a compact surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.