LM3674MF-1.2/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3674MF-1.2/NOPB is a synchronous step-down DC-DC converter from Texas Instruments, housed in a compact SOT-23-5 package. It delivers a fixed 1.2 V output with up to 600 mA load current capability. The device operates within an input voltage range of 2.7 V to 5.5 V and utilizes a fixed 2 MHz switching frequency. It supports an operating temperature range from -30°C to +85°C. This component is designed for high efficiency and minimal external component count.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Optimized for powering low-voltage circuits from single Li-Ion cell batteries and standard input rails
• Internal synchronous rectification ensures high efficiency during PWM mode operation
• High switching frequency allows the use of only three tiny external surface-mount components
• Shutdown mode significantly reduces battery consumption by turning off the device

Voltage Regulators - DC DC Switching Regulators Applications

• Mobile phones
• Portable systems
• Low-voltage circuit power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status as per manufacturer documentation. Confirm the 'MF' package code corresponds to the SOT-23-5 form factor required for your PCB layout. Check current availability status as this part may be discontinued or subject to supply constraints. Ensure compatibility with your target input voltage range of 2.7 V to 5.5 V before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when space-constrained designs require a buck converter in a SOT-23-5 package. It is suitable for applications needing a fixed 1.2 V rail from a single-cell lithium-ion source. Consider the 600 mA current limit for load requirements. The 2 MHz frequency aids in minimizing passive component size compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3674 series of step-down DC-DC converters. It shares core architecture with variants offering different fixed output voltages or adjustable settings. The family is characterized by its small footprint and integration of synchronous rectifiers. Other members include models like LM3674MF-1.5 and LM3674MF-2.8, maintaining identical pinouts and electrical characteristics except for output voltage.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM3674 variants with different fixed output voltages if the voltage level can be adapted, such as LM3674MF-1.5 or LM3674MF-2.8. Cross-reference with LM3671 series devices for similar performance in SOT-23-5 packages, noting potential differences in current rating or feature sets.