LM2676T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2676T-3.3/NOPB is a SIMPLE SWITCHER® high-efficiency 3A step-down voltage regulator from Texas Instruments, housed in a TO-220-7 package. It operates with an input voltage range of 8V to 40V and provides a fixed 3.3V output. The device features a 260 kHz fixed-frequency internal oscillator, allowing for the use of compact external components. It includes built-in thermal shutdown and current limiting for robust protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 150 mΩ DMOS power switch enables high efficiency up to 94%.
• Fixed 260 kHz switching frequency reduces required external component size.
• Includes thermal shutdown and cycle-by-cycle current limiting for fault protection.

Voltage Regulators - DC DC Switching Regulators Applications

• High-efficiency buck switching regulators
• Pre-regulators for linear voltage systems
• Battery chargers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' indicates lead-free and RoHS compliance compared to older variants like 'LM2676T-3.3'. Confirm the TO-220-7 through-hole package matches your PCB layout requirements. Ensure the fixed 3.3V output version aligns with your design needs rather than adjustable or other fixed voltage options.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part for designs requiring a simple, high-current buck converter with minimal external components. The TO-220-7 package offers superior thermal dissipation compared to surface-mount versions, suitable for applications where heat management is critical without additional heatsinking infrastructure.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2676 series of SIMPLE SWITCHER regulators, designed as efficient replacements for traditional three-terminal linear regulators. The series covers various output voltages and packages, providing designers with flexibility while maintaining a consistent control architecture and performance profile across the family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM2676T-3.3/NOPB (lead-free variant) and LM2676T-ADJ/NOPB if adjustable output is acceptable. Cross-reference with LM2676S-3.3 for surface-mount alternatives if board space constraints change.