LM3671MFX-1.6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MFX-1.6/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, belonging to the LM3671 series. It operates with an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.6 V. The device supports a maximum output current of 600 mA and utilizes a buck topology. It features a switching frequency of 2.6 MHz and functions within a temperature range of -40°C to +85°C. Packaged in a compact SOT-23-5 format, it is designed for space-constrained portable applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency across load conditions
• Automatically switches between PWM and PFM modes to optimize light-load performance
• Includes internal protection mechanisms such as overcurrent limiting and thermal shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single lithium-ion batteries
• Portable consumer electronics requiring compact power solutions
• Battery-operated devices needing extended standby life

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix '1.6' confirms the fixed 1.6 V output voltage variant. Ensure the 'NOPB' designation indicates lead-free and RoHS compliance status. Confirm the 'MFX' package code corresponds to the SOT-23-5 surface-mount configuration required for your PCB layout. Cross-reference the manufacturer datasheet for any recent product change notifications affecting this part number.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.6 V rail is required from a 2.7 V to 5.5 V source. It is suitable for designs prioritizing small footprint due to the SOT-23-5 package. Consider the 2.6 MHz switching frequency for minimizing external passive component size. Evaluate the 600 mA current limit against peak load requirements to ensure adequate headroom.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of high-efficiency step-down converters. The family offers various fixed voltage options and adjustable variants to suit different system requirements. These devices are characterized by their ability to operate efficiently with minimal external components, making them standard choices for mobile and handheld electronic systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.6/NOPB (THT version)

Voltage Regulators - DC DC Switching Regulators FAQ

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

The device enters PFM mode at light loads, reducing the quiescent current to approximately 16 µA.

Does the LM3671MFX-1.6/NOPB support adjustable output voltage?

No, the '-1.6' suffix indicates a fixed output voltage of 1.6 V. Adjustable versions use the '-ADJ' suffix.