LM3674MFX-2.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MFX-2.8/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, designed for low-voltage applications powered by single Li-Ion cells or input rails ranging from 2.7 V to 5.5 V. It delivers up to 600 mA of load current with a fixed output voltage of 2.8 V. The device operates at a typical switching frequency of 2 MHz, enabling the use of minimal external components including an inductor and two ceramic capacitors. Packaged in a compact SOT-23-5 format, it supports surface-mount installation and functions within a temperature range of -30°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification provides high efficiency during Pulse Width Modulation (PWM) mode operation.
• High switching frequency allows for the use of tiny external surface-mount components, minimizing board space.
• Shutdown mode significantly reduces battery consumption by turning off the device.

Voltage Regulators - DC DC Switching Regulators Applications

• Mobile phones
• Portable systems
• Low-voltage circuits powered by single Li-Ion cell batteries

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MFX' confirms the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the '-NOPB' designation ensures compliance with RoHS standards and absence of certain hazardous substances as per manufacturer specifications. Ensure the 2.8 V fixed output variant matches the target circuit design requirements before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing portable electronics requiring efficient power conversion from a single lithium-ion source. The 2 MHz frequency is suitable for applications prioritizing small passive component sizes over ultra-low noise. Verify that the 600 mA current capability meets the peak load demands of the downstream logic or RF sections without exceeding thermal limits in the SOT-23-5 package.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 family of step-down converters from Texas Instruments. It shares core topology and performance characteristics with other variants in the series, differing primarily in output voltage settings and packaging options. The family is optimized for mobile and portable devices where space constraints and battery life are critical design parameters.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3674MF-2.8/NOPB: Identical electrical specifications but in a cut-tape or loose piece package rather than reel.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the typical shutdown current for the LM3674MFX-2.8/NOPB?

The device reduces battery consumption to 0.01 µA (typical) when placed in shutdown mode.

Does the LM3674MFX-2.8/NOPB support adjustable output voltages?

No, the LM3674MFX-2.8/NOPB variant provides a fixed output voltage of 2.8 V. Adjustable versions exist within the broader LM3674 family.