LM3671MF-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MF-3.3 is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, featuring a 3.3 V output and 600 mA maximum load current capability. It operates within an input voltage range of 2.7 V to 5.5 V and utilizes a Buck topology with a typical switching frequency of 2 MHz. The device is housed in a SOT-23-5 surface-mount package and supports an operating temperature range from -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between PWM low-noise mode and PFM low-current mode to optimize system control and efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation while minimizing external component requirements.
• Integrated protection mechanisms including internal soft-start, current overload protection, and thermal shutdown to safeguard circuit integrity.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single-cell lithium-ion batteries
• Portable mobile communication devices
• Handheld consumer electronics such as MP3 players and digital cameras

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' for lead-free compliance against RoHS standards before procurement. Confirm that the SOT-23-5 package variant matches the required PCB footprint. Ensure the fixed 3.3 V output aligns with target load requirements, as adjustable versions exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a stable 3.3 V rail is required without external feedback resistors. Consider the 2 MHz switching frequency for enabling smaller passive components compared to lower-frequency alternatives. Evaluate the 600 mA limit against peak load demands to ensure adequate headroom for transient currents.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM3671 series of step-down converters designed for portable applications. It shares core architectural features with other variants like the LM3671MF-ADJ but differs in providing a fixed output voltage rather than an adjustable one, simplifying design implementation for standard voltage rails.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MFX-3.3/NOPB offers identical electrical specifications in an X-version tape-and-reel packaging format suitable for automated assembly processes.