LM3671MF-1.875

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-1.875/NOPB is a synchronous step-down DC-DC converter from Texas Instruments, housed in a SOT-23-5 package. It provides a fixed output voltage of 1.875 V with a maximum load current of 600 mA. The device operates within an input voltage range of 2.7 V to 5.5 V and features a typical switching frequency of 2.6 MHz. It supports operation temperatures from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between PWM low-noise mode and PFM low-current mode to optimize system control and efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM mode operation.
• Integrated protection mechanisms including internal soft start, current overload protection, and thermal shutdown for reliable performance.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits in mobile phones and similar portable systems
• Supplying power from single lithium-ion batteries or 2.7V to 5.5V input rails
• Portable electronic devices requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) against the manufacturer's official documentation to confirm RoHS compliance and lead-free status. Ensure the fixed output voltage matches the target circuit requirement, as this variant is not adjustable. Confirm the SOT-23-5 package dimensions align with the PCB footprint design before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.875 V output is required for portable applications powered by single-cell lithium batteries. It is suitable for designs needing compact size due to the small external component count. Consider the 2.6 MHz switching frequency for minimizing passive component sizes while maintaining efficiency under loads up to 600 mA.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 series of 2 MHz, 600 mA step-down DC-DC converters. The series is optimized for portable devices, offering various fixed voltage options and adjustable versions. The LM3671 family utilizes a buck topology with integrated synchronous rectifiers to provide high efficiency in a minimal footprint.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM3671MF-1.8/NOPB
• LM3671MF-1.5/NOPB
• LM3671MF-1.25/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM3671MF-1.875 support adjustable output voltage?

No, the LM3671MF-1.875 provides a fixed output voltage of 1.875 V. Adjustable versions are available in the LM3671 series under different part numbers.

What is the typical static current in light-load conditions?

The typical static current is 16 µA when operating in the PFM low-current mode, which helps extend battery life in standby or light-load scenarios.