LM3671MF-2.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-2.8/NOPB is a fixed-output synchronous step-down DC-DC converter manufactured by Texas Instruments. It provides a regulated 2.8 V output with a maximum load current of 600 mA. The device operates from an input voltage range of 2.7 V to 5.5 V and utilizes a buck topology. It features a switching frequency of 2.6 MHz, enabling the use of compact external components. The IC is housed in a five-pin SOT-23 package (SC-74A) suitable for surface-mount assembly. It supports operation across an ambient temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for improved efficiency
• Fixed internal feedback network sets the output voltage
• Compact footprint enabled by high-frequency switching

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered electronic devices
• Embedded systems requiring stable low-voltage rails
• General-purpose power management in space-constrained designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free and RoHS compliance as per manufacturer specifications. Confirm the MF variant corresponds to the specific tape-and-reel or cut-tape packaging configuration required for your assembly line. Ensure the 2.8 V fixed output matches the target circuit requirements, as other voltage options exist within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 2.8 V rail is required with up to 600 mA capacity. The 2.6 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the SOT-23-5 package constraints regarding thermal dissipation and board space. Verify that the input voltage source remains within the 2.7 V to 5.5 V operational window.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of step-down converters from Texas Instruments. The family shares common architectural features including synchronous rectification and fixed-frequency operation. Variants are distinguished primarily by their fixed output voltage settings and specific packaging options, allowing designers to choose the precise voltage level needed for different subsystems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Other LM3671 variants with different fixed output voltages (e.g., 1.8 V, 3.3 V) share identical pinouts and functionality. Direct substitution requires ensuring the new output voltage meets the load requirements. Non-TI equivalents may require schematic adjustments due to differences in switching frequency or control loop characteristics.