LM3670MF-2.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-2.5/NOPB is a miniature synchronous step-down DC-DC converter manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. Housed in an SOT-23-5 package, this buck regulator delivers a fixed 2.5V output with a maximum current capacity of 600mA. It operates within an input voltage range of 2.7V to 5.5V and utilizes a high switching frequency of 2MHz to minimize external component size. The device supports efficient power management for portable electronics, featuring low quiescent current and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology ensures high conversion efficiency for extended battery life in portable devices.
• Compact SOT-23-5 packaging facilitates space-constrained designs in mobile and handheld applications.
• Integrated thermal regulation protects the device during overtemperature conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Wireless mobile phones
• Digital cameras
• MP3 players
• Personal digital assistants (PDAs)
• Hard disk drives

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix /NOPB indicates lead-free compliance and RoHS adherence as per manufacturer specifications. Confirm the specific output voltage variant matches the design requirement, as the LM3670 series includes adjustable and other fixed voltage options. Ensure the SOT-23-5 package type aligns with the PCB footprint constraints. Cross-reference the datasheet revision date to confirm technical parameters remain consistent with current production standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, high-efficiency solution is required for single-cell lithium-ion or multi-cell NiMH battery systems. The 2MHz switching frequency allows for smaller inductors and capacitors compared to lower-frequency alternatives. Consider the 600mA output limit to ensure it meets the peak load requirements of the target circuit without exceeding thermal limits under worst-case operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM367x family of miniature DC-DC converters introduced by National Semiconductor and now managed by Texas Instruments. The family targets ultra-low voltage circuits and portable consumer electronics. Variants such as LM3670MF-ADJ offer adjustable outputs, while others provide fixed voltages like 1.8V or 3.3V, all sharing similar packaging and core control architectures.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers include LM3670MFX-2.5/NOPB, which differs only in reel packaging rather than electrical function. Other variants within the LM3670 series may serve as functional replacements if their fixed output voltages match the system requirement. Verify pinout compatibility before substitution.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum output current for the LM3670MF-2.5/NOPB?

The device provides a maximum output current of 600mA.

Does the LM3670MF-2.5/NOPB support adjustable output voltage?

No, the -2.5 suffix indicates a fixed 2.5V output. Adjustable versions are designated with the -ADJ suffix.