LM2677S-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677S-12/NOPB is a high-efficiency 5A step-down voltage regulator from the SIMPLE SWITCHER family. It operates with an input voltage range of 8V to 40V and provides a fixed 12V output. The device integrates a 0.5A, 60V switch and features a switching frequency of 260kHz. It utilizes a TO-263-7 package for surface mount installation. The regulator supports operation temperatures from -40°C to +125°C and includes internal frequency synchronization capabilities.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current power switch rated at 0.5A and 60V breakdown capability.
• Supports external clock synchronization for noise reduction in sensitive systems.
• Includes comprehensive protection mechanisms such as thermal shutdown and current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems operating within wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free and RoHS compliance. Confirm the TO-263-7 package matches your PCB footprint requirements. Ensure the fixed 12V output aligns with your load specifications. Check for moisture sensitivity level (MSL) handling instructions during assembly. Validate that the 260kHz switching frequency does not interfere with nearby RF circuits.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from an 8V to 40V source. Choose the Suffix variant for lead-free manufacturing processes. Consider the TO-263-7 package for adequate thermal dissipation at 5A loads. Evaluate the need for frequency synchronization if multiple converters operate in proximity. Compare against adjustable variants if flexible output voltages are needed instead.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2677 series of SIMPLE SWITCHER regulators. It is distinct from the LM2676 (3A) and LM2678 (5A, different pinout/features) counterparts. The 'S' denotes the surface-mount TO-263 package, while '12' specifies the fixed 12V output voltage. It serves as a robust solution for medium-power DC-DC conversion applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB is the direct lead-free equivalent of older LM2677S-12 versions. Cross-reference with LM2677SX-12 for identical functionality in alternative packaging. Verify compatibility with LM22677 series if automotive qualification or synchronization features are prioritized over the standard industrial grade.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM2677S-12 support frequency synchronization?

Yes, the device allows external clock synchronization to reduce system-wide noise.

What is the maximum input voltage for this regulator?

The maximum input voltage rating is 40V.