LM3671MFX-1.5

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671MFX-1.5/NOPB is a fixed-output buck DC-DC converter from Texas Instruments, providing a stable 1.5V output with a maximum load current of 600mA. It operates within an input voltage range of 2.7V to 5.5V and features a typical switching frequency of 2MHz. The device utilizes SOT-23-5 surface-mount packaging 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 for optimized system control
• Internal synchronous rectification ensures high efficiency during PWM operation
• Requires only three external surface-mount components: one inductor and two ceramic capacitors

Voltage Regulators - DC DC Switching Regulators Applications

• Mobile phones and similar portable systems
• Portable hard drives
• Personal digital assistants (PDAs)
• MP3 players and digital cameras

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status and RoHS compliance. Confirm the 'MF' designation corresponds to the SOT-23-5 package variant. Ensure the fixed 1.5V output matches the target circuit requirements, as adjustable versions exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, single-cell battery-powered solution is required. The 2MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 600mA limit against peak load demands and verify thermal performance within the specified ambient temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3671 series of step-down converters designed for portable electronics. It offers fixed voltage options alongside adjustable variants, all sharing the same core architecture for efficient power management from single lithium-ion sources.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MFX-1.25/NOPB provides a different fixed output voltage. LM3671MFX-ADJ offers adjustable output capability. Verify pinout compatibility and thermal characteristics before substituting.