LM3671LC-1.6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671LC-1.6/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, originally developed under the National Semiconductor brand. It operates with a fixed switching frequency of 2MHz and delivers up to 600mA of output current. The device features a fixed 1.6V output voltage and accepts an input voltage range of 2.7V to 5.5V. It utilizes a compact SOT23-5 package and includes integrated protection mechanisms such as overcurrent limiting and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency across load ranges
• Automatically switches between PWM and PFM modes to optimize battery life
• Supports minimal external component count using one inductor and two capacitors

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices powered by single-cell lithium-ion batteries
• Wireless communication modules requiring low noise power supplies
• Battery-operated consumer electronics such as digital cameras and MP3 players

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix /NOPB confirms lead-free compliance and RoHS adherence. Confirm the manufacturer source is Texas Instruments, as they acquired the National Semiconductor portfolio. Ensure the specific voltage code LC corresponds to the required 1.6V output for your design. Check datasheet revisions for any pinout or electrical parameter updates.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.6V rail is required from a 2.7V to 5.5V source. It is suitable for space-constrained designs due to the SOT23-5 footprint. Consider the 2MHz frequency for smaller passive components. Verify that the 600mA current limit meets the peak load requirements of the target circuit.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 family of miniaturized synchronous buck converters. The series was introduced to address the need for high-efficiency power management in portable systems. The LM3671LC variant specifically provides a fixed 1.6V output, distinguishing it from adjustable or other fixed-voltage options within the same product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671LC-1.6/NOPBDD serves as a tape-and-reel alternative to the cut-tape version. Other fixed-output variants like LM3671LC-1.8/NOPB are functionally similar but provide different voltage levels.