LM2677T-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677T-12/NOPB is a high-efficiency 5A step-down voltage regulator from Texas Instruments, operating within the SIMPLE SWITCHER family. It utilizes a fixed 260 kHz switching frequency to minimize external component size. The device accepts an input voltage range of 8 V to 40 V and provides a fixed 12 V output. Designed for through-hole mounting in a TO-220-7 package, it supports operation temperatures from -40°C to +125°C with a quiescent current of 4.2 mA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch eliminates the need for external boost diodes
• Fixed internal switching frequency reduces required passive component count
• Built-in thermal shutdown and current limit protection ensures operational reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial control systems
• Distributed power architectures requiring high current delivery
• Battery-powered equipment with wide input voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'T' confirms the TO-220-7 through-hole package variant rather than surface-mount options. Confirm the '-12' designation matches the required 12V fixed output specification. Ensure compatibility with the intended thermal management strategy given the 5A continuous load capability and package constraints.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust through-hole solution is required for high-current applications. The fixed 12V output simplifies design compared to adjustable variants. Consider the 260 kHz frequency trade-off between component size and efficiency at light loads. Verify that the TO-220-7 footprint fits the target PCB layout and thermal requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2677 series of SIMPLE SWITCHER regulators, which are designed for high-efficiency buck conversion. The series includes variations such as the LM2676 (3A) and LM2678 (5A), offering different current ratings and packages. The LM2677 specifically targets 5A applications with a focus on minimizing external components while maintaining high performance across a wide input voltage range.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB offers identical electrical specifications but uses a TO-263-7 surface-mount package instead of the through-hole TO-220-7 configuration.