LM3671LC-1.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671LC-1.3/NOPB is a fixed-output step-down DC-DC converter from the Texas Instruments LM3671 series, manufactured by National Semiconductor. It features a buck topology with a fixed output voltage of 1.3V and a maximum output current of 600mA. The device operates within an input voltage range of 2.7V to 5.5V and utilizes a switching frequency of 2MHz. Packaged in a compact DSBGA-5 format, it supports surface-mount installation and functions across a temperature range of -40°C to +85°C.

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 light-load performance
• Includes internal protection mechanisms such as overcurrent limiting and thermal shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage digital circuits from single-cell lithium-ion batteries
• Portable electronic devices requiring compact power solutions
• Embedded systems utilizing fixed 1.3V logic rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as this part number is associated with National Semiconductor rather than Texas Instruments. Confirm the package type matches the DSBGA-5 specification required for your PCB layout. Ensure the fixed 1.3V output aligns with your system design needs, as adjustable variants exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.3V rail is required with a maximum load of 600mA. It is suitable for designs prioritizing small footprint due to the DSBGA-5 package. Consider the 2MHz switching frequency for minimizing external passive component size compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3671 family of 2MHz, 600mA step-down converters. While similar to the LM3671MF series which uses SOT-23-5 packaging, the LC suffix indicates the DSBGA-5 package variant. It shares core electrical specifications with other fixed-output versions like the LM3671LC-1.2/NOPB.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671LC-1.2/NOPB offers identical electrical characteristics with a 1.2V fixed output. LM3671MF-1.3/NOPB provides the same 1.3V output but in an SOT-23-5 package.