LM3670MF-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-ADJ/NOPB is a step-down DC/DC converter manufactured by Texas Instruments, housed in a SOT-23-5 package. 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 with a switching frequency of 1 MHz. Quiescent current is specified at 15 µA. It supports automatic PFM/PWM mode switching for efficiency optimization across load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous buck topology within a compact SOT-23-5 footprint
• Features automatic transition between pulse frequency modulation and pulse width modulation modes
• Supports wide input voltage ranges suitable for single-cell lithium-ion applications

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered consumer electronics
• Cellular phones and mobile communication devices
• Personal digital assistants (PDAs)
• MP3 players and portable media devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates compliance with RoHS directives and absence of lead. Confirm the MF package code corresponds to the SC-74A/SOT-753 variant. Ensure the ADJ designation matches the required adjustable output configuration rather than fixed voltage options. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when space-constrained designs require a high-efficiency synchronous buck converter. The 1 MHz switching frequency allows for smaller external inductors and capacitors compared to lower-frequency alternatives. The adjustable output range accommodates various logic levels. Consider the 15 µA quiescent current for battery life requirements in standby modes. Evaluate thermal performance based on the small surface-mount package constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3670 family of switching regulators designed for portable applications. It complements other Texas Instruments power management solutions by offering a balance of size, efficiency, and cost. The family typically includes variants with fixed output voltages and different package options to suit diverse board layout requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing bill of materials if considering alternative manufacturers or pin-compatible devices from other vendors.