LM22678TJ-ADJ/J7002567

Voltage Regulators - DC DC Switching Regulators Overview

The LM22678TJ-ADJ is a SIMPLE SWITCHER step-down DC/DC switching regulator from Texas Instruments. It integrates a 5A switch and operates with an input voltage range of 4.5V to 42V. The output voltage is adjustable from 1.285V to 37V. It supports a switching frequency up to 1MHz and includes frequency synchronization capabilities. The device features overcurrent protection, thermal shutdown, and a precision enable function. It is housed in a TO-263 (D2PAK) package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current 5A power switch for efficient step-down conversion
• Supports external frequency synchronization for multi-module phase alignment
• Includes built-in thermal shutdown and cycle-by-cycle current limiting
• Features a precision enable pin for system power management

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring robust power regulation
• Distributed power architectures in telecommunications equipment
• Embedded systems with wide input voltage variations
• Point-of-load regulation for digital signal processors

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix J7002567 against official TI documentation to confirm it denotes a standard commercial grade variant or a specific manufacturing lot code. Ensure the ordering part number matches the exact package and temperature rating required for your design. Cross-reference with the LM22678QTJ-ADJ/NOPB datasheet for electrical specifications. Confirm RoHS compliance status through the manufacturer's official product information page.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a non-synchronous buck converter with high current capability and frequency synchronization is needed. It is suitable for designs requiring operation from a 42V bus with outputs up to 5A. Consider the TO-263 package for its thermal performance in space-constrained applications. Evaluate the need for external compensation if using low-ESR ceramic capacitors, although the device is designed for stability with typical components.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM22678 belongs to the SIMPLE SWITCHER family, which provides integrated power switches and control circuitry to simplify power supply design. This series focuses on high efficiency and ease of use by minimizing external component count. The LM22678 specifically targets applications requiring higher current than the 1A or 3A variants in the same family, such as the LM22675 or LM22670.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2678 is a legacy non-synchronous alternative with similar 5A capability but lacks frequency synchronization. For synchronous alternatives, consider the LM516x series. Verify that any replacement maintains the 42V input rating and adequate thermal dissipation characteristics for the intended load conditions.