LM70840RRXR

Voltage Regulators - DC DC Switching Regulators Overview

The LM70840RRXR is a high-density, low-EMI synchronous DC/DC step-down converter from Texas Instruments. It features an input voltage range of 4.5V to 80V and delivers up to 4A of output current. The device operates with a switching frequency between 200kHz and 2.2MHz. It utilizes a VQFN-EP-29 package for compact board space efficiency. The converter supports adjustable output voltages from 800mV to 36V. It includes integrated protection features such as overcurrent protection and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Low electromagnetic interference design for noise-sensitive applications
• Wide input voltage range supporting 4.5V to 80V sources
• High-efficiency synchronous buck topology
• Compact VQFN-EP-29 package for high power density

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial automation systems
• Telecommunications infrastructure
• Enterprise computing platforms
• Automotive electronics

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix RRXR indicates the reel packaging configuration when ordering. Confirm the component matches the LM708x0 family specifications regarding the 4A output rating. Ensure compatibility with the required input voltage range of 4.5V to 80V. Check for moisture sensitivity level requirements during storage and handling procedures prior to assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring wide input voltage tolerance up to 80V. Consider the 4A continuous current capability for moderate power loads. Evaluate the VQFN-EP-29 footprint against available PCB real estate constraints. Assess the need for low EMI performance in sensitive signal environments compared to standard converters.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM708x0 family of high-efficiency buck converters. The family includes variants with 8A, 6A, and 4A output capabilities. All members share similar architectural features optimized for high power density. The LM70840 specifically targets the 4A segment of this product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes within the same family include LM70860 and LM70880 models. These parts offer higher current ratings but maintain similar electrical characteristics. Verify pinout compatibility and thermal performance when substituting with higher current variants.