LM3670MF-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-3.3/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for space-constrained applications. It operates within an input voltage range of 2.5 V to 5.5 V and provides a fixed 3.3 V output at up to 350 mA. The device integrates a 1 MHz switching frequency and utilizes SOT-23-5 packaging. It supports automatic transition between Pulse Frequency Modulation (PFM) and Pulse Width Modulation (PWM) modes to optimize efficiency across varying load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a synchronous buck converter with internal power switches for high efficiency in a minimal footprint.
• Features automatic PFM/PWM mode switching to maintain high efficiency during light-load operation while ensuring stability under heavy loads.
• Includes built-in soft-start functionality to limit inrush current during startup sequences.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices requiring efficient voltage regulation
• Embedded systems with strict size constraints
• Low-power consumer electronics

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Confirm the package marking matches the SOT-23-5 physical dimensions. Ensure the fixed 3.3 V output variant aligns with the target circuit design requirements before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is required for stepping down single-cell lithium-ion or alkaline battery voltages to 3.3 V. It is suitable for applications where moderate output current up to 350 mA is sufficient. Consider the 1 MHz switching frequency for smaller external passive component sizes compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3670 family of mini SD DC-DC converters from Texas Instruments. It shares architectural similarities with other members like the LM3671 but differs in maximum output current capabilities and specific fixed voltage options. The family targets ultra-small form factor designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM3670 variants with different fixed output voltages, such as LM3670MF-1.8/NOPB or LM3670MF-ADJ/NOPB, provided the voltage requirement changes. Cross-family replacements may require evaluation of current handling and pin compatibility.