LM3670MF-1.8

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-1.8 is a miniature step-down DC-DC converter designed for ultra-low voltage circuits, manufactured by Texas Instruments. It operates with an input voltage range of 2.5 V to 5.5 V and provides a fixed output voltage of 1.8 V. The device delivers up to 750 mA of output current and features automatic PFM/PWM mode switching for optimized efficiency across load conditions. It utilizes voltage-mode control with pulse width modulation technology. The component is housed in a 5-pin SOT-23 package (LSSOP/TSOP5/6) and supports operation temperatures from -40 °C to 85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automatic transition between Pulse Frequency Modulation (PFM) and Pulse Width Modulation (PWM) modes to maintain high efficiency under varying load conditions.
• Compact SOT-23-5 packaging enables significant board space reduction for portable applications.
• Integrated synchronous rectification improves conversion efficiency compared to standard diode-based designs.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring efficient power management
• Ultra-low voltage circuit systems
• Battery-powered devices needing extended runtime

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix configuration against the official datasheet to ensure compatibility with your design requirements. Confirm that the ordering part number matches the exact output voltage and package variant specified in your schematic. Cross-reference the manufacturer's latest documentation to validate any recent revisions or compliance updates before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact footprint and high efficiency are critical for low-voltage applications. Ensure the required output current does not exceed the 750 mA limit. Verify that the input voltage range aligns with the system's power source. Consider thermal performance within the SOT-23 package constraints for high-load scenarios.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3670 family of miniature step-down converters. It shares functional similarities with other members like the LM3670MF-1.2 and LM3670MF-ADJ, differing primarily in fixed output voltage settings. The family is characterized by its small size and suitability for battery-operated equipment.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM3670MF-1.2/NOPB and LM3670MF-ADJ/NOPB if voltage adjustments are permissible. For higher current needs, consider the LM3671 series. Verify pinout and thermal characteristics before swapping.