LM3674MFX-1.875/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MFX-1.875/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, featuring a 1.875 V output and 600 mA load current capability. It operates within an input voltage range of 2.7 V to 5.5 V at a typical switching frequency of 2 MHz. The device utilizes internal synchronous rectification for high efficiency and offers a shutdown mode with 0.01 µA typical quiescent current. Packaged in a compact SOT-23-5 format, it supports surface-mount installation across a commercial temperature range of -30°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification ensures high conversion efficiency during PWM operation.
• High switching frequency allows the use of minimal external components, including a small inductor and ceramic capacitors.
• Ultra-low shutdown current significantly reduces battery consumption in portable applications.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single Li-Ion cell batteries
• Mobile phones and similar portable systems
• Input voltage rails ranging from 2.7 V to 5.5 V

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix against official Texas Instruments documentation to confirm the fixed 1.875 V output specification. Ensure the package type matches the required SOT-23-5 footprint for PCB layout compatibility. Confirm RoHS compliance status through the manufacturer's latest product change notifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.875 V rail is required from a 2.7 V to 5.5 V source. The 600 mA output current suits moderate load applications. Consider the 2 MHz frequency for minimizing passive component size. Verify thermal performance requirements against the SOT-23-5 package limitations for the specific ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 series of step-down DC-DC converters designed for portable electronics. It shares the core architecture with other variants like the LM3674MFX-1.8/NOPB but provides a distinct fixed output voltage. The series is optimized for mobile phone power management, balancing efficiency, size, and cost in a compact five-pin package.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3674MFX-1.8/NOPB: Fixed 1.8 V output; verify voltage tolerance compatibility.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the typical quiescent current in shutdown mode?

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

Does the LM3674MFX-1.875/NOPB support adjustable output voltages?

No, this specific part number provides a fixed 1.875 V output. Adjustable versions exist within the LM3674 family.