LM3280TL-280/NOPB

Overview

The LM3280TL-280/NOPB is a fixed-output synchronous buck regulator from the LM3280 series, manufactured by Texas Instruments following its acquisition of National Semiconductor. It provides a regulated 2.8V output with a maximum load current of 300mA. The device integrates high-side and low-side N-channel MOSFETs for efficient power conversion. It operates within an input voltage range of 2.7V to 5.5V and supports switching frequencies up to 2.2MHz. The component is housed in a thermally enhanced 10-pin DFN package (RUG) designed for surface-mount applications.

Feature Summary

• Integrated synchronous rectification using internal N-channel MOSFETs
• Fixed 2.8V output voltage configuration
• Supports high-frequency operation up to 2.2MHz
• Thermally optimized surface-mount packaging

Applications

• Portable battery-powered electronic devices
• Embedded systems requiring stable low-voltage rails
• Consumer electronics with space-constrained PCB layouts

Procurement Notes

Verify that the ordering suffix /NOPB confirms lead-free compliance and RoHS adherence as per manufacturer specifications. Confirm the package designation RUG matches the required footprint for PCB design. Ensure the part number corresponds to the specific 2.8V fixed output variant rather than adjustable or other voltage options within the LM3280 family.

Selection Notes

Select this component when a compact solution for converting 3.3V or 5V sources to 2.8V is required. The integrated MOSFETs eliminate the need for external Schottky diodes, reducing component count. The high switching frequency allows for smaller external inductors and capacitors compared to lower-frequency regulators, facilitating miniaturization in dense circuit designs.

Part Context

This part belongs to the LM3280 family of synchronous step-down converters. Originally developed by National Semiconductor, the product line was transferred to Texas Instruments upon acquisition. The LM3280 series is characterized by its ability to deliver moderate currents with high efficiency in small form factors, targeting applications where board space and power consumption are critical constraints.

Replacement Considerations

Direct replacements include LM3280TLX/NOPB and LM3280TL-280/NOPB variants from Texas Instruments. Verify pin compatibility and thermal performance when substituting with other 300mA synchronous buck regulators from manufacturers such as Analog Devices or Diodes Incorporated.