LM3671MFX-2.8

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MFX-2.8/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for portable applications. It features a buck topology with a fixed 2.8 V output and a maximum load current of 600 mA. The device operates within an input voltage range of 2.7 V to 5.5 V and utilizes a typical switching frequency of 2 MHz. It is housed in a compact SOT-23-5 package and supports surface-mount installation. The operational temperature range spans from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between Pulse Width Modulation (PWM) low-noise mode and Pulse Frequency Modulation (PFM) low-current mode to optimize system efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation while minimizing external component count.
• Integrated protection mechanisms include internal soft-start functionality, current overload protection, and thermal shutdown to safeguard the circuit under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion battery sources
• Mobile phone power management systems
• Portable electronic devices requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official documentation to confirm the fixed output voltage and RoHS compliance status. Ensure the ordering part number matches the required package type and temperature rating. Cross-reference manufacturer datasheets for accurate pinout and electrical specifications before integration into design schematics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 2.8 V rail is required from a 2.7 V to 5.5 V input source. It is suitable for designs prioritizing small footprint due to the SOT-23-5 package and minimal external component requirements. Consider the 600 mA current limit and 2 MHz switching frequency for filter component sizing.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3671 family of step-down DC-DC converters optimized for portable electronics. The series offers various fixed voltage outputs and adjustable versions, all sharing common features like high switching frequency and low quiescent current. The LM3671MFX variant specifically denotes the tape-and-reel packaging format.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for equivalent parts with matching voltage, current, and package specifications. Verify compatibility regarding switching frequency and control loop stability when replacing with alternative regulators.