LM5176QPWPTQ1

Overview

The LM5176QPWPTQ1 is an automotive-grade synchronous four-switch buck-boost controller designed for high-voltage applications. It supports a wide input voltage range from 4.2 V to 55 V and delivers up to 2 A of output current. The device operates with adjustable switching frequencies between 100 kHz and 600 kHz, featuring a maximum duty cycle of 100%. It provides an output voltage range from 800 mV to 55 V and functions within a temperature range of -40°C to +125°C. Packaged in a 28-pin HTSSOP, it meets AEC-Q100 qualification standards.

Feature Summary

• Synchronous four-switch topology enables seamless transition between buck and boost modes without external component complexity.
• Wide input voltage capability accommodates various automotive power supply conditions including load dump scenarios.
• Integrated shutdown function allows for efficient power management and system control integration.

Applications

• Automotive infotainment systems requiring stable power delivery under varying battery conditions
• High-side or low-side gate driver bias supplies for power switches
• Industrial control systems needing isolated or non-isolated power rails

Procurement Notes

Verify the specific suffix 'PWPTQ1' confirms the HTSSOP-28 package and automotive grade qualification. Ensure compatibility with AEC-Q100 requirements for your application environment. Confirm that the 55 V maximum rating aligns with your system's peak voltage stresses. Check humidity sensitivity labeling for proper storage and reflow processing guidelines.

Selection Notes

Select this controller when designing systems requiring both step-down and step-up conversion capabilities from a single stage. Consider the 2 A output limit for load requirements and the 100 kHz to 600 kHz frequency range for filter size optimization. Evaluate thermal performance within the HTSSOP-28 package for your expected ambient temperatures and power dissipation levels.

Part Context

This component belongs to the LM5176 family of high-voltage buck-boost controllers. It shares functional similarities with other Texas Instruments automotive power management ICs but is distinct in its four-switch architecture. The QPWTQ1 designation indicates specific packaging and automotive reliability testing compared to standard industrial variants.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference options through official Texas Instruments channels or authorized distributors for equivalent automotive-grade specifications.