LM3674MF-2.8

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MF-2.8 is a step-down DC-DC converter manufactured by Texas Instruments, designed for low-voltage applications powered by single Li-Ion cell batteries or input rails ranging from 2.7 V to 5.5 V. It delivers up to 600 mA of load current across the entire input voltage range and features 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. It utilizes internal synchronous rectification for high efficiency during PWM mode operation and offers superior performance characteristics suitable for mobile phones and portable systems.

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 only three tiny external surface-mount components
• Operates from a single Li-Ion cell battery with input voltage rails from 2.7 V to 5.5 V
• Provides up to 600 mA load current over the entire input voltage range

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 designation when ordering, as variants such as LM3674MF-2.8/NOPB indicate lead-free construction while others may differ. Confirm package availability in SOT-23-5 format and ensure compatibility with required operating temperature ranges. Cross-reference datasheet revisions to confirm pinout consistency and electrical specifications match design requirements before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing space-constrained portable electronics requiring efficient power conversion from a single lithium-ion source. The fixed 2.8 V output eliminates the need for external feedback resistors, simplifying the bill of materials. Ensure the application demands a maximum load current within the 600 mA limit and can accommodate the thermal characteristics associated with the small SOT-23-5 package under continuous operation conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 series of step-down DC-DC converters, which are optimized for powering low-voltage circuits from single-cell lithium-ion batteries. The series includes various fixed output voltage versions and adjustable variants, all sharing the same core architecture featuring internal synchronous rectification and a 2 MHz switching frequency. These devices are widely used in consumer electronics where size and efficiency are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3674MF-1.2/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the typical shutdown current for the LM3674MF-2.8?

In shutdown mode, the device reduces battery consumption to a typical value of 0.01 µA.

How many external components are required for the LM3674MF-2.8?

Only three tiny external surface-mount components are needed: one inductor and two ceramic capacitors.