LM26480SQ-BF/NOPB

Overview

The LM26480SQ-BF/NOPB is a specialized power management integrated circuit (PMIC) designed for low-power digital applications, including advanced application processors and FPGAs. It integrates two high-efficiency 1.5A step-down DC-DC converters and two 300mA low-dropout linear regulators (LDOs). The device operates with an input voltage range of 1.74V to 5.5V and provides adjustable output voltages from 800mV to 3.5V. Key electrical characteristics include a 2MHz PWM switching frequency for the buck converters, quiescent current of 33µA, and LDO feedback voltage accuracy of ±3%. It features thermal overload protection, current limit protection, and undervoltage lockout.

Feature Summary

• Integrates dual high-current buck regulators and dual LDOs for comprehensive power rail generation
• Optimized for low-power digital systems with ultra-low quiescent current consumption
• Includes precision internal reference and automatic soft-start functionality
• Provides robust protection mechanisms including thermal and current overload safeguards

Applications

• Powering internal processor functions in advanced application processors
• Supplying I/O rails for Field Programmable Gate Arrays (FPGAs)
• Low-power digital system power management units
• Battery-powered portable electronic devices requiring efficient voltage regulation

Procurement Notes

Verify the specific suffix BF against the official Texas Instruments datasheet to confirm pinout and external programming requirements. Ensure the component meets AEC-Q100 automotive qualification standards if required for your specific design environment. Cross-reference the package marking with the manufacturer's identification guide to prevent counterfeit parts. Confirm RoHS compliance status through the latest product data sheet revision notes before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require multiple regulated rails from a single source with high efficiency. The dual 1.5A buck converters are suitable for core voltage generation, while the dual 300mA LDOs provide clean power for sensitive analog or I/O sections. Consider the 2MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives. Evaluate the thermal performance within the WQFN-24 package based on your expected load currents and ambient temperature conditions.

Part Context

This part belongs to the LM26480 family of multi-rail power management ICs from Texas Instruments. It is specifically engineered to simplify board space and reduce component count in complex digital designs. The SQ variant indicates automotive-grade reliability and qualification. It serves as a consolidated solution replacing discrete regulator arrangements, thereby improving power density and system reliability in compact form factors.

Replacement Considerations

Check for LM26480SQ-AA/NOPB as a potential alternative within the same family, noting differences in external programming capabilities. Verify pin-to-pin compatibility and electrical parameter overlaps before substitution. Consult the manufacturer's obsolescence notices and recommended replacement guides for any discontinued variants in the LM26480 series.