LM3280TL/NOPB

Overview

The LM3280TL-275/NOPB is a PMIC from Texas Instruments featuring four outputs: one buck converter and three LDOs. It operates on a 2.7V to 5.5V supply with a 2MHz switching frequency. Output 1 provides 0.8V–3.6V at 300mA. Outputs 2 and 3 are fixed at 2.85V and 2.75V, respectively, each delivering 20mA. The device is housed in a 16-WFBGA (DSBGA) package and functions within a -30°C to 85°C temperature range.

Feature Summary

• Integrates a synchronous buck regulator alongside three low-dropout linear regulators for combined power management.
• Utilizes a high-frequency 2MHz switching architecture to minimize the size of external passive components.
• Designed for portable applications requiring efficient power conversion from single-cell lithium-ion sources.

Applications

• Mobile phones
• Personal digital assistants
• Portable media players

Procurement Notes

Verify the specific suffix '275' against the datasheet to confirm output voltage configurations. Ensure the 'NOPB' designation aligns with lead-free RoHS requirements. Confirm the 16-WFBGA package dimensions match the PCB footprint. Check the operating temperature range against environmental specifications.

Selection Notes

Select this component when a compact solution is needed for multi-rail systems. The integrated topology reduces board space compared to discrete solutions. Verify that the 300mA buck current meets load demands. Ensure input voltage stays within the 2.7V to 5.5V operational window.

Part Context

This part belongs to the LM3280 family of quad-output power management ICs. It combines switching and linear regulation technologies. The manufacturer transitioned from National Semiconductor to Texas Instruments. The NOPB suffix indicates a non-plumb compliant version.

Replacement Considerations

Check for LM3280 variants with different output voltages or packages. Verify pin compatibility before substitution. Review thermal performance differences between similar models.