LMR66420R5RXBR

Voltage Regulators - DC DC Switching Regulators Overview

The LMR66420R5RXBR is a synchronous step-down converter from Texas Instruments featuring a VQFN-FCRLF-EP-14 package. It operates with an input voltage range of 3 V to 36 V and delivers up to 2 A output current. The device integrates a fixed switching frequency of 2.2 MHz, enabling the use of small external components. It supports output voltages down to 1 V and includes shutdown functionality. The component functions within a temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency in a compact footprint
• Fixed 2.2 MHz switching frequency minimizes external passive component size
• Low quiescent current consumption enhances system power savings during standby
• Built-in protection mechanisms including thermal shutdown and current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered equipment requiring efficient DC-DC conversion
• Industrial control systems with wide input voltage ranges
• Embedded computing platforms needing stable low-noise power rails
• Automotive infotainment and sensor modules operating in harsh environments

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix R5RXBR confirms the 14-pin VQFN-FCRLF-EP package and 150°C junction temperature rating. Confirm moisture sensitivity level requirements for your assembly process. Ensure the ordering part number matches the exact electrical specifications required for your design, as variations exist within the LMR664xx family regarding current ratings and package types.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 36 V is required alongside a 2 A load capability. The fixed 2.2 MHz frequency is suitable for designs prioritizing board space over ultra-low noise. Consider the thermal performance of the exposed pad VQFN package for high-power density applications. Verify that the output voltage setting aligns with the internal reference and feedback resistor network capabilities.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMR664xx series of non-isolated DC-DC converters designed for high-efficiency power management. The series offers various current ratings and package options to suit different application constraints. The LMR66420 variant specifically targets applications requiring 2 A continuous output current with robust protection features and wide input compatibility.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other members of the LMR664xx family such as the LMR66430 for higher current needs or LMR66410 for lower current requirements. Cross-reference pinouts and thermal characteristics carefully when replacing with devices from other manufacturers offering similar buck converter architectures.