LM2677S-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677S-ADJ/NOPB is a high-efficiency 5A step-down switching voltage regulator from Texas Instruments, utilizing the SIMPLE SWITCHER architecture. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage between 1.2V and 37V. The device features a fixed switching frequency of 260kHz and supports up to 5A output current in a TO-263-7 surface-mount package. It functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power switch enables compact buck converter designs without external MOSFETs
• Adjustable output voltage allows flexibility for various system requirements
• Fixed 260kHz switching frequency reduces required passive component size
• Internal thermal shutdown and current limit protect against overload conditions

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 at elevated temperatures
• Communication infrastructure power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free status and RoHS compliance when sourcing. Confirm the ADJ variant designation ensures adjustable output capability rather than fixed voltage options. Ensure the TO-263-7 package matches your PCB footprint requirements. Check datasheet specifications for thermal performance under expected load conditions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 5A buck regulator with adjustable output is needed. Consider the 260kHz frequency for balancing efficiency and component size. Evaluate thermal management needs given the high current capability and wide input range. Compare against fixed-output variants if specific voltage levels are sufficient for the application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2677 series of SIMPLE SWITCHER regulators. It shares architectural similarities with other members like the LM2677T (through-hole) and LM2677S-12 (fixed 12V output). The series is designed for high-efficiency DC/DC conversion in space-constrained applications requiring reliable power delivery.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB offers similar performance but with a fixed 12V output instead of adjustable. LM2677T-5.0/NOPB provides equivalent electrical characteristics in a through-hole TO-220 package. Verify pin compatibility and thermal requirements when substituting across package types or fixed vs. adjustable variants.