LM2677T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677T-3.3 is a SIMPLE SWITCHER high-efficiency 5A step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 8 V to 40 V and provides a fixed 3.3 V output at up to 5 A. The device utilizes a buck topology with a switching frequency of 260 kHz. It is housed in a TO-220-5 through-hole package, supports operation from -40°C to +125°C, and includes internal features such as current limiting and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for improved efficiency
• Fixed 3.3 V output voltage option
• Built-in current limit and thermal protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial systems
• Power supplies for embedded controllers
• Battery-powered equipment requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'T' indicates the TO-220-5 through-hole package variant distinct from surface-mount versions. Confirm the '-3.3' designation specifies the fixed 3.3 V output. Ensure compatibility with lead-free manufacturing processes if RoHS compliance is required. Cross-reference datasheet revision dates for updated electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust through-hole solution is required for high-current applications. The TO-220-5 package facilitates easier thermal management compared to smaller surface-mount options. Consider the 260 kHz switching frequency for balancing component size and efficiency. Verify that the 8 V minimum input voltage aligns with the system power source.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the LM2677 SIMPLE SWITCHER family, which offers high-efficiency 5A step-down regulation. The LM2677 series integrates the switch, controller, and freewheeling diode into a single monolithic IC. This family simplifies design by reducing external component count while maintaining high performance across various industrial and commercial environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-3.3/NOPB (Surface Mount Version)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum output current capability?

The LM2677T-3.3 can deliver a continuous output current of up to 5 A.

Does the device include overcurrent protection?

Yes, it features internal current limiting to protect against short circuits and overload conditions.