LM22678TJ-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM22678TJ-ADJ/NOPB is a SIMPLE SWITCHER® step-down voltage regulator manufactured by Texas Instruments. It integrates a 7A N-channel MOSFET and operates at a fixed switching frequency of 2.95MHz. The device supports an input voltage range from 4.5V to 42V, delivering an adjustable output voltage between 1.21V and 37V with a maximum continuous current of 7A. It utilizes a TO-263-7 (D2PAK) surface-mount package for efficient thermal dissipation. Key features include internal compensation, cycle-by-cycle current limiting, and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current 7A N-channel power MOSFET within a single monolithic IC.
• Utilizes a fixed 2.95MHz switching frequency to minimize external component size.
• Features internally compensated voltage-mode control for stable operation without external compensation networks.
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial point-of-load regulation
• Embedded system power supplies
• Communication equipment backend power
• Automotive auxiliary power systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix 'TJ' corresponds to the TO-263-7 D2PAK package variant. Confirm that the 'ADJ' designation indicates the adjustable output version rather than a fixed voltage option. Ensure compatibility with the 2.95MHz switching frequency requirements for your specific EMI and transient response constraints before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when high output current up to 7A is required in a compact surface-mount form factor. The fixed 2.95MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the non-synchronous architecture which may result in slightly lower efficiency at light loads but simplifies the design by eliminating the need for synchronous rectification control logic.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2267x series of SIMPLE SWITCHER regulators, designed for high-efficiency DC-DC conversion. It represents a higher-current evolution of the LM267x family, offering integrated power switching capabilities. The series is characterized by its ease of use, requiring minimal external components while providing robust performance in demanding industrial and commercial environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2678SX-ADJ/NOPB: Lower current capability (5A) and different switching frequency (260kHz).

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM22678TJ-ADJ/NOPB require external compensation?

No, the device features internally compensated voltage-mode control, allowing it to operate stably without external compensation networks.

What is the switching frequency of this regulator?

The LM22678TJ-ADJ/NOPB operates at a fixed switching frequency of 2.95MHz.