LM3677LE-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3677LE-1.8/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. It provides a regulated 1.8V output with a maximum current capacity of 600mA. The device operates within an input voltage range of 2.7V to 5V and utilizes a 6-USON package. It supports both pulse-width modulation (PWM) and pulse-frequency modulation (PFM) control techniques for optimized efficiency across load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates PFM control technique for enhanced light-load efficiency
• Supports automatic switching between PWM and PFM modes
• Designed for ultra-low voltage circuit applications

Voltage Regulators - DC DC Switching Regulators Applications

• Ultra-low voltage portable electronic circuits
• Battery-powered consumer devices requiring high light-load efficiency
• Miniature step-down power supply designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation as Texas Instruments on official datasheets, noting the historical National Semiconductor lineage. Confirm the specific suffix /NOPB indicates lead-free compliance. Ensure the 6-USON package code matches your PCB footprint requirements before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8V output is required from a single-cell lithium battery or similar 2.7V-5V source. It is suitable for space-constrained designs due to the 6-USON package. Consider its PFM capability if extending battery life in low-duty-cycle applications is a primary design constraint.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3677 family of miniature step-down converters. While other variants like the LM3677TL offer different packages such as 5DSBGA, the LE variant specifically utilizes the 6-USON form factor. The family shares core topology but differs in physical dimensions and thermal characteristics based on the selected package type.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM3677LE-1.82/NOPB serves as a verified substitute offering a 1.82V output in the same 6-USON package. Other family members like the LM3677TL series provide equivalent electrical performance but utilize different pin-compatible or non-compatible packages such as 5DSBGA.