LM22678QTJ-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM22678QTJ-5.0/NOPB is a SIMPLE SWITCHER step-down voltage regulator manufactured by Texas Instruments, designed for high-efficiency power conversion in compact spaces. It operates with an input voltage range of 4.5 V to 42 V and delivers a fixed output voltage of 5.0 V at up to 3 A load current. The device integrates a 3 A switch and utilizes a buck topology with a fixed switching frequency of 500 kHz. Packaged in a TO-263-7 (D2PAK) surface-mount format, it supports operation from -40°C to +125°C and holds AEC-Q100 qualification for automotive reliability.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3 A power switch within a single monolithic IC to minimize external component count
• Features a fixed 500 kHz switching frequency to enable the use of small passive components
• Includes internal compensation and protection mechanisms such as thermal shutdown and current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment and body control modules requiring AEC-Q100 qualified regulators
• Industrial distributed power systems needing efficient step-down conversion
• Embedded controllers and communication equipment power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering part number matches the required package style and temperature grade. Cross-reference the specific revision level to guarantee consistency with existing design documentation and supply chain requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, non-synchronous buck converter is needed for 3 A applications. It is suitable for designs prioritizing thermal performance via the TO-263-7 package over ultra-high efficiency synchronous alternatives. Consider its fixed 500 kHz frequency for balancing component size and EMI performance in standard industrial or automotive environments.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2267x family of SIMPLE SWITCHER regulators, which are known for integrating power switches to simplify design. The LM22678 specifically targets 3 A loads, bridging the gap between lower-current regulators and higher-power solutions like the LM22679. It serves as a reliable choice for general-purpose DC/DC conversion where automotive qualification and thermal robustness are critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other members of the LM2267x series with compatible current ratings and packages, such as the LM22678QTJ-ADJ/NOPB for adjustable output. Verify that any replacement maintains the same TO-263-7 footprint and AEC-Q100 qualification if automotive compliance is required.