LM22679TJ-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM22679TJ-5.0 is a Texas Instruments SIMPLE SWITCHER step-down voltage regulator featuring an integrated 3-A power switch. It operates from an input voltage range of 4.5 V to 42 V, providing a fixed 5 V output at up to 3 A. The device utilizes a 500 kHz switching frequency and includes adjustable current limit, thermal shutdown, and soft-start capabilities. Packaged in a TO-263 (DPAK) case, it supports surface-mount installation with a wide operating temperature range.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-efficiency 3-A power switch for compact design
• Fixed 5 V output option with internal feedback network
• Built-in protection against overcurrent and excessive temperature

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Power supplies for embedded computing systems
• Distribution voltage conversion in automotive applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments; parts may bear TI branding. Confirm the suffix 'NOPB' indicates lead-free/RoHS compliance if required. Ensure the package matches the specified TO-263 footprint and verify the fixed 5.0 V output variant against schematic requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5 V output is required from a 42 V maximum input source. The integrated 3-A switch eliminates external MOSFETs, reducing bill of materials. Consider the TO-263 package for its thermal performance relative to smaller SOT-223 alternatives. Validate that the 500 kHz frequency aligns with EMI constraints and inductor size requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2679/LM22679 family of monolithic step-down regulators. The LM22679 series offers improved efficiency and lower quiescent current compared to earlier generations. The TJ suffix denotes the TO-263 package, while the -5.0 indicates the fixed 5 V output version. It is designed for direct replacement in legacy designs using discrete buck converter solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM22679TJ-5.0/NOPB: Verified equivalent with explicit RoHS compliance statement.