LM3674MF-1.5

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MF-1.5 is a step-down DC-DC converter optimized for powering low-voltage circuits from a single Li-Ion cell battery or input voltage rails ranging from 2.7 V to 5.5 V. It provides up to 600 mA load current over the entire input voltage range. The device operates at a fixed switching frequency of 2 MHz (typical) in Pulse Width Modulation mode, utilizing internal synchronous rectification for high efficiency. It features a shutdown mode that reduces battery consumption to 0.01 µA (typical). Available in a 5-pin SOT-23 package, it requires only three tiny external surface-mount components: an inductor and two ceramic capacitors.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification ensures high efficiency during PWM mode operation.
• High switching frequency allows the use of minimal external surface-mount components.
• Shutdown mode significantly reduces battery consumption for portable applications.

Voltage Regulators - DC DC Switching Regulators Applications

• Mobile phones
• Portable systems
• Low-voltage circuit power supply

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized Texas Instruments channels or certified distributors. Confirm lead-free status via the NOPB suffix if required. Check datasheet revisions for updated electrical characteristics. Ensure compatibility with existing PCB footprint designs. Validate thermal performance under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring compact size and high efficiency from single-cell lithium-ion batteries. Consider the fixed 1.5 V output for specific logic levels. Evaluate the 2 MHz switching frequency against electromagnetic interference requirements. Compare alternative fixed-output versions if different voltage levels are needed.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 family of step-down DC-DC converters manufactured by Texas Instruments, formerly National Semiconductor. The family includes various fixed output voltage options and adjustable versions. The LM3674 series is designed specifically for portable electronics where space and battery life 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-1.5?

The typical shutdown current is 0.01 µA.

What is the maximum load current provided by this converter?

It provides up to 600 mA load current over the entire input voltage range.