LM3677TL-1.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3677TL-1.5/NOPB is a fixed-output step-down DC-DC converter manufactured by National Semiconductor, now part of Texas Instruments. It provides a regulated 1.5V output with a maximum load current of 600mA. The device operates from an input voltage range of 2.7V to 5.5V and utilizes a 5-pin DSBGA package. It integrates a 3MHz switching frequency for compact external component sizing.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a synchronous buck converter topology for high efficiency in a miniature footprint.
• Supports Pulse Frequency Modulation (PFM) control technique at light loads to extend battery life.
• Features internal compensation and power switches to minimize external component count.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring ultra-low voltage regulation
• Battery-powered devices utilizing pulse-frequency modulation for extended runtime
• Space-constrained embedded systems needing miniature surface-mount packaging

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments on the datasheet header. Confirm the suffix /NOPB indicates lead-free compliance. Ensure the specific output voltage variant matches the design requirement, as the LM3677 family includes multiple fixed voltage options.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5V output is required within a 2.7V to 5.5V input range. The 600mA current limit suits low-power applications. Consider the 5DSBGA package constraints for PCB layout. Verify thermal performance requirements against the specified operating temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3677 series of miniature step-down converters. It shares architectural similarities with the LM3671 and LM3678 families but offers distinct output voltage configurations and package options tailored for specific space and power constraints in portable electronic designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other LM3677 variants only if the output voltage specification allows.