LM3674MF-1.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MF-1.5/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for low-voltage applications. It operates within an input voltage range of 2.7 V to 5.5 V and delivers up to 600 mA of load current. The device features a typical switching frequency of 2 MHz, enabling the use of compact external components. It utilizes internal synchronous rectification for high efficiency and includes soft start functionality. The component is housed in a SOT-23-5 package and supports operation temperatures from -30°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal synchronous rectification ensures high efficiency during PWM mode operation.
• Fixed 2 MHz switching frequency allows for minimal external component count.
• Integrated soft start limits inrush current during power-up sequences.
• Ultra-low shutdown current reduces battery consumption in standby modes.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits from single Li-Ion cell batteries
• Mobile phone and portable system power management
• Input voltage rails ranging from 2.7 V to 5.5 V

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS status as documented by Texas Instruments. Confirm the 'MF' package designation corresponds to the SOT-23-5 form factor required for your PCB layout. Cross-reference the fixed 1.5 V output requirement against your circuit design specifications to ensure compatibility with downstream loads.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5 V output is required from a single-cell lithium-ion source or similar rail. The 600 mA current capability suits moderate load applications where space constraints necessitate the small SOT-23-5 footprint. Ensure the design accounts for the 2 MHz switching frequency to manage electromagnetic interference appropriately.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 family of step-down converters. Variants within this series offer different fixed output voltages, such as 1.2 V, 2.8 V, and 3.3 V, while maintaining identical electrical characteristics and packaging. The LM3674 series is distinct from the LM3671, which operates at a higher 2.6 MHz frequency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3674MF-1.2/NOPB provides a 1.2 V output. LM3674MF-2.8/NOPB provides a 2.8 V output. LM3674MFX-1.5/NOPB offers the same 1.5 V output in an X-version package.