LM2676SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2676SX-5.0/NOPB is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator from Texas Instruments, operating at a fixed switching frequency of 260 kHz. It provides a fixed 5 V output with a maximum input voltage of 40 V and features an internal 3 A power switch. The device utilizes TO-263-7 packaging for surface mount installation, supporting operation across a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3 A power switch within a compact monolithic package to minimize external component count.
• Utilizes SIMPLE SWITCHER architecture to simplify design through fixed-frequency operation and integrated compensation.
• Incorporates thermal shutdown and current limit protection mechanisms to ensure robust system reliability.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in distributed power architectures
• Efficient battery-powered systems requiring step-down conversion
• General-purpose 5 V supply generation from higher voltage rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the presence of the NOPB suffix to confirm RoHS compliance and lead-free status. Ensure the ordering part number matches the specific TO-263-7 package variant. Cross-reference manufacturer datasheets to validate electrical parameters against application requirements before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required with up to 3 A load capability. It is suitable for designs prioritizing efficiency and reduced board space over adjustable output flexibility. Consider the 260 kHz switching frequency for inductor sizing and EMI constraints relative to alternative frequencies.

Voltage Regulators - DC DC Switching Regulators Part Context

This regulator belongs to the LM2676 series, which includes adjustable and other fixed voltage variants. The SX designation indicates the TO-263-7 surface-mount package, while the 5.0 suffix specifies the fixed 5 V output configuration. The NOPB suffix denotes non-lead-based packaging compliant with environmental directives.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2676SX-5.0/NOPB serves as the direct replacement for the obsolete LM2676SX-5.0. Designers transitioning from older inventory should verify that the physical footprint and pinout remain identical between the legacy and NOPB versions.