LM3671MF-2.8

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-2.8 is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for portable applications. It operates with an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 2.8 V. The device supports a maximum load current of 600 mA and utilizes a synchronous buck topology. It features a typical switching frequency of 2 MHz, allowing for the use of small external components. The component is housed in a SOT-23-5 package and is rated for an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes to optimize efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation.
• Integrated soft-start functionality limits inrush current during startup sequences.
• Comprehensive protection mechanisms including thermal shutdown and current overload protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion batteries
• Portable mobile devices and handheld systems
• Battery-operated consumer electronics

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MF' indicates the tape-and-reel packaging format when ordering. Confirm that the '-2.8' designation corresponds to the required 2.8 V fixed output voltage. Ensure compatibility with the SOT-23-5 footprint on the target PCB layout. Check for RoHS compliance status as indicated in the official datasheet documentation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is needed for converting higher battery voltages down to 2.8 V. The 2 MHz switching frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the 600 mA current limit against peak system demands. Verify that the input voltage range covers the minimum and maximum battery states.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of step-down DC-DC converters from Texas Instruments. The family includes various fixed voltage outputs and adjustable versions. These converters are engineered for high efficiency in space-constrained portable designs. The LM3671 series is widely recognized for its ability to maintain performance across wide input voltage ranges.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers include LM3671MFX-2.8/NOPB. Verify pinout and electrical specifications match before substitution. Other variants within the LM3671 series may offer different output voltages or packaging options.