LM70840QRRXRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM70840QRRXRQ1 is an automotive-grade synchronous buck converter from Texas Instruments, designed for high-density power applications. It operates with a wide input voltage range of 4.5V to 80V and delivers up to 4A of output current. The device features adjustable switching frequencies between 200 kHz and 2.2 MHz to optimize efficiency and external component size. It includes integrated protection mechanisms such as overcurrent protection and thermal shutdown. The component is housed in a 29-pin VQFN package suitable for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• Wide input voltage range supporting 4.5V to 80V operation
• Adjustable switching frequency from 200 kHz to 2.2 MHz
• Integrated low quiescent current for improved light-load efficiency

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Advanced driver assistance systems (ADAS)
• Body control modules
• Telematics units

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'RRXR' indicates the tape and reel packaging configuration. Confirm the Q1 designation ensures automotive grade compliance. Check the datasheet for moisture sensitivity level and reflow soldering profiles. Ensure the ordering part number matches the required output voltage options. Validate the package marking code for authenticity.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring high input voltage tolerance up to 80V. Choose based on the need for a compact solution with up to 4A continuous current capability. Consider the adjustable frequency range for EMI management and passive component optimization. Ensure the thermal performance meets the system requirements given the VQFN package constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM708x0-Q1 family of high-efficiency buck converters. The family includes variants delivering 6A and 8A outputs. All members share similar architectural features but differ in current handling capabilities. The LM70840 specifically targets applications needing moderate current within a wide input range.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM708x0-Q1 family members like LM70860QRRXRQ1 or LM70880QRRXRQ1 if higher current is acceptable. Verify pin compatibility and thermal characteristics before substitution. Non-family replacements require careful evaluation of input voltage range and switching frequency compatibility.