LM3671MF-1.375

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-1.375/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, belonging to the LM3671 series. It provides a fixed output voltage of 1.375 V with a maximum output current capability of 600 mA. The device operates from an input voltage range of 2.7 V to 5.5 V and utilizes a synchronous buck topology. Key electrical parameters include a switching frequency of 2.6 MHz and a typical quiescent current of 16 µA in PFM mode. It is housed in a compact SOT-23-5 package and supports an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency across load ranges
• Automatically transitions between PWM and PFM modes for optimized performance
• Includes internal compensation and soft-start circuitry
• Features thermal shutdown protection

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices requiring efficient voltage regulation
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries
• Low-voltage logic supply generation in mobile applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) to confirm lead-free status and RoHS compliance. Confirm the fixed output voltage matches the design requirement, as the LM3671 family offers multiple fixed options. Ensure the SOT-23-5 package footprint aligns with the PCB layout. Check datasheet specifications for thermal requirements under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.375 V output is required from a 2.7 V to 5.5 V source. It is suitable for space-constrained designs due to the small SOT-23-5 package. Consider the 2.6 MHz switching frequency for smaller external passive components compared to lower-frequency alternatives. Verify that the 600 mA current limit meets the peak load demands of the application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part is a member of the LM3671 family of 2 MHz, 600 mA step-down converters. It shares core architecture with variants like LM3671MF-1.25/NOPB and LM3671MF-1.5/NOPB, differing primarily in the factory-set feedback resistor network that determines the output voltage. The 'MF' indicates the SOT-23-5 package type.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.25/NOPB: Different fixed output voltage (1.25 V). LM3671MF-1.5/NOPB: Different fixed output voltage (1.5 V). LM3671MF-ADJ/NOPB: Adjustable output variant requiring external resistors.