LM26480SQ-AA/NOPB

Overview

The LM26480SQ-AA/NOPB is a Texas Instruments PMIC featuring two 1.5A buck converters and two 300mA LDOs in a WQFN-24 package. It operates with an input voltage range of 1.74V to 5.5V, providing adjustable outputs from 800mV to 3.5V. The device supports a 2MHz PWM switching frequency and includes automatic soft-start. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual high-current buck regulators and dual low-dropout linear regulators for comprehensive power management.
• Includes built-in thermal overload protection, current overload protection, and undervoltage lockout detection.
• Features precise internal reference voltages and automatic soft-start capabilities for stable operation.

Applications

• Powering advanced application processors
• Supplying power to Field Programmable Gate Arrays (FPGAs)
• Providing internal processor function power via integrated LDOs
• Supplying I/O power rails

Procurement Notes

Verify the specific suffix AA against the official datasheet to confirm output voltage ranges and pin configurations. Ensure the WQFN-24 package matches the target PCB footprint. Confirm that the -40°C to +85°C operating temperature range meets the system requirements. Validate RoHS compliance status through the manufacturer's documentation before finalizing procurement.

Selection Notes

Select this component when a single IC solution is required for both high-current digital logic and precision analog supplies. The integration of buck converters and LDOs reduces board space compared to discrete solutions. Consider the 2MHz switching frequency for smaller external passive components. Verify that the 1.5A per converter rating suffices for the peak load demands of the connected processors or FPGAs.

Part Context

This part belongs to the LM26480 series of professional power management ICs designed for low-power digital applications. It consolidates multiple power stages into one compact package, simplifying design complexity for embedded systems requiring mixed-signal power distribution.

Replacement Considerations

Check the LM26480QSX-8D/NOPB variant for automotive qualification if AEC-Q100 certification is required. Review the LM26420 series for alternative current ratings or package options if the 1.5A buck limit is insufficient.

FAQ

What is the maximum switching frequency of the buck converters?

The buck converters operate at a fixed PWM switching frequency of 2MHz.

Does the device include protection features?

Yes, it includes thermal overload protection, current overload protection, and undervoltage lockout detection.