LM3674MF-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MF-ADJ/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments. It operates with an input voltage range of 2.7 V to 5.5 V and delivers up to 600 mA of output current. The device features a fixed switching frequency of 2 MHz, enabling the use of small external components. It provides an adjustable output voltage within the range of 1.1 V to 3.3 V. The component is housed in a 5-pin SOT-23 package and supports operation temperatures from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification for high efficiency during PWM mode operation
• Fixed-frequency 2 MHz switching allows minimal external component count
• Ultra-low shutdown current reduces battery consumption in portable systems

Voltage Regulators - DC DC Switching Regulators Applications

• Mobile phones and similar portable systems
• Low-voltage circuits powered by single Li-Ion cell batteries
• Input voltage rails from 2.7 V to 5.5 V

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status and RoHS compliance as per manufacturer documentation. Confirm the 'ADJ' designation matches the required adjustable output voltage range of 1.1 V to 3.3 V for the target design. Ensure the SOT-23-5 package footprint aligns with the PCB layout specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing power supplies for portable devices requiring a compact solution. The 2 MHz frequency permits the use of tiny surface-mount inductors and capacitors. It is suitable for applications needing efficient power conversion from a single lithium-ion cell or standard 5V rails while maintaining low quiescent current in standby modes.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 series of step-down DC-DC converters. It shares core topology and performance characteristics with other variants in the family, such as fixed-output versions like the LM3674MF-2.8/NOPB. The primary distinction lies in the output configuration, where the ADJ variant offers flexibility through external resistor programming rather than a fixed internal reference voltage.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3674MF-1.2/NOPB (Fixed Output)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the adjustable output voltage range?

The output voltage can be adjusted between 1.1 V and 3.3 V using external resistors.

Does the device support synchronous rectification?

Yes, the LM3674MF-ADJ/NOPB includes internal synchronous rectification to improve efficiency during PWM mode operation.