LM22673QMR-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM22673QMR-ADJ/NOPB is a SIMPLE SWITCHER® step-down voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 4.5 V to 42 V and provides a maximum output current of 3 A. The device features an adjustable output voltage, a fixed switching frequency of 500 kHz, and a typical quiescent current of 3.4 mA. It is housed in an SO-PowerPAD-8 package and supports surface-mount installation. The component is qualified under AEC-Q100 standards for automotive applications and functions within a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side switch capable of delivering up to 3 A output current
• Built-in adjustable soft-start mechanism limits inrush current during startup
• Incorporates cycle-by-cycle current limit and thermal shutdown protection
• Supports external synchronization or fixed 500 kHz switching operation

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive electronics systems requiring AEC-Q100 compliance
• Industrial equipment power distribution networks
• Embedded computing and server infrastructure power supplies
• Telecommunications base station and network equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'QMR' corresponds to the required SO-PowerPAD-8 package and tape-and-reel quantity. Confirm that the 'ADJ' designation matches the need for an adjustable output voltage rather than a fixed variant. Ensure the 'NOPB' suffix indicates lead-free and RoHS compliance as per the manufacturer's specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a buck converter topology is required for inputs up to 42 V. It is suitable for designs needing a 3 A continuous load capability with integrated protection features. Consider the SO-PowerPAD-8 package for efficient thermal dissipation in space-constrained PCB layouts. Verify that the 500 kHz switching frequency aligns with the available passive component sizes and EMI requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM22673 series of SIMPLE SWITCHER regulators from Texas Instruments. The series includes various fixed and adjustable output variants packaged in different form factors such as TO-263 and DFN. The QMR suffix specifically identifies the surface-mount PowerPAD package variant designed for improved thermal performance compared to standard plastic packages.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM22673QMR-5.0/NOPB (Fixed 5.0V Output)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the purpose of the ADJ suffix in the part number?

The ADJ suffix indicates that the output voltage is adjustable via an external resistor divider network, allowing designers to set the voltage to any value within the specified operating range.

Does this regulator support external clock synchronization?

Yes, the LM22673 allows the switching frequency to be synchronized to an external clock signal, which can help reduce electromagnetic interference by aligning multiple converters.