LM3677LEE-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3677LEE-1.8/NOPB is a synchronous step-down DC-DC converter manufactured by Texas Instruments, designed for ultra-low voltage circuits. It features a fixed 1.8V output with a maximum load current of 600mA. The device operates within an input voltage range of 2.7V to 5.5V and utilizes a 3MHz switching frequency. It is housed in a compact 6-USON (UFDFN) package. The converter supports both pulse-width modulation and pulse-frequency modulation control techniques, ensuring efficient power management in space-constrained applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology for high efficiency
• Compact 6-pin USON package design
• Supports PWM and PFM control modes
• Fixed 1.8V output configuration

Voltage Regulators - DC DC Switching Regulators Applications

• Ultra-low voltage circuit power supplies
• Portable electronic devices
• Space-constrained embedded systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the 'LEE' package code corresponds to the 6-USON form factor required for your PCB layout. Ensure the fixed 1.8V output matches your system requirements, as this variant does not support adjustable output voltages. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8V rail is required from a 2.7V to 5.5V input source. The 600mA current capability suits low-power applications. The 3MHz frequency allows for smaller external inductors and capacitors compared to lower-frequency alternatives. Consider the 6-USON package size if board real estate is limited. Verify thermal performance under maximum load conditions given the small footprint.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3677 family of miniature step-down converters from Texas Instruments. It shares architectural similarities with the LM3671 series but offers a higher 3MHz switching frequency and a different package option. The family targets portable electronics requiring efficient power conversion in minimal space. The NOPB suffix denotes non-pb-free variants are excluded, aligning with environmental standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM3677 variants with different fixed output voltages, such as LM3677LEE-1.2/NOPB or LM3677LEE-1.5/NOPB, provided the voltage requirement changes. The LM3671 series offers similar functionality but at a 2.6MHz frequency and potentially different pinout or package constraints. Verify electrical parameters and thermal characteristics before substitution.