LM3670MF-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-ADJ is a miniature step-down DC-DC converter designed for ultralow voltage circuits. It operates with an input voltage range of 2.5 V to 5.5 V and provides an adjustable output voltage from 700 mV to 3.3 V. The device delivers up to 350 mA of output current while maintaining a low quiescent current of 15 µA. It features automatic PFM/PWM mode switching to optimize efficiency across varying load conditions. The converter integrates a 1 MHz switching frequency and utilizes voltage-mode control with pulse width modulation technology.

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 at light and heavy loads.
• Compact SOT-23-5 package design suitable for space-constrained portable applications.
• Integrated synchronous rectification for improved power conversion efficiency.

Voltage Regulators - DC DC Switching Regulators Applications

• Ultralow voltage circuit power management
• Portable electronic devices requiring compact power solutions
• Battery-powered systems needing extended runtime

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix configuration when ordering, as the LM3670MF-ADJ/NOPB variant indicates RoHS compliance compared to non-NOPB versions. Confirm package availability in cut tape or reel formats based on production requirements. Ensure compatibility with the required output voltage setting via external resistor network before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a small footprint and efficient power regulation within a 2.5 V to 5.5 V input range. The adjustable output allows flexibility for various logic levels. Consider the 15 µA quiescent current for battery life optimization. Ensure thermal management aligns with the SOT-23-5 package limitations under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM3670 belongs to Texas Instruments' family of miniature step-down converters targeting ultra-low voltage applications. It shares architectural similarities with the LM3671 and LM3674 series but offers distinct current capabilities and switching frequencies. This part serves as a specialized solution for portable electronics where size and efficiency are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM3670MF-ADJ/NOPB is the direct RoHS-compliant equivalent. Verify pinout and electrical specifications against alternatives like the LM3671 or LM3674 if higher current or different switching frequencies are required.