LM3671MF-1.6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-1.6/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, originally under National Semiconductor. It provides a fixed 1.6 V output with a maximum load current of 600 mA. The device operates from an input voltage range of 2.7 V to 5.5 V and utilizes a fixed switching frequency of 2 MHz (typical). It features internal synchronous rectification for high efficiency and includes protection mechanisms such as current overload and thermal shutdown. The component is housed in a compact SOT-23-5 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification ensures high efficiency during PWM mode operation.
• Fixed 2 MHz switching frequency allows for the use of small external components.
• Integrated current overload and thermal shutdown protection enhance reliability.

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 manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Confirm the suffix /NOPB indicates lead-free compliance. Ensure the specific fixed output voltage matches the design requirement, as other variants exist within the same series. Cross-reference the datasheet version to confirm pinout and electrical characteristics align with the intended application.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.6 V output is required from a 2.7 V to 5.5 V input source. It is suitable for space-constrained designs due to the SOT-23-5 package. Consider the 600 mA current limit and 2 MHz switching frequency for inductor selection. Verify that the fixed output voltage meets the system requirements, as adjustable versions are available if flexibility is needed.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of 2 MHz, 600 mA step-down DC-DC converters. The 'MF' suffix denotes the SOT-23-5 package type. The '-1.6' indicates the fixed 1.6 V output voltage. The '/NOPB' suffix signifies a lead-free product compliant with RoHS standards. This family is optimized for portable applications requiring efficient power management from single-cell lithium-ion batteries.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-1.6 (Lead-free variant)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the typical shutdown current for the LM3671MF-1.6/NOPB?

The typical shutdown current is 0.01 µA.

Does the LM3671MF-1.6/NOPB support adjustable output voltages?

No, the LM3671MF-1.6/NOPB has a fixed output voltage of 1.6 V. Adjustable versions are available in the LM3671 series.