LMR66430MB3RXBR

Voltage Regulators - DC DC Switching Regulators Overview

The LMR66430MB3RXBR is a synchronous step-down converter from the Texas Instruments LMR66430 series. It operates with an input voltage range of 3 V to 36 V and delivers up to 3 A of output current. The device features a fixed switching frequency of 2.2 MHz and provides a fixed 3.3 V output. It utilizes a VQFN-FCRLF-EP-14 package suitable for surface mount installation. The component supports operation across a temperature range from -40 °C to +125 °C and includes shutdown functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology for efficient power conversion
• Integrated high-side and low-side MOSFETs
• Fixed 2.2 MHz switching frequency
• Shutdown pin for power management

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronics requiring compact power solutions
• Industrial control systems
• Infotainment systems in automotive applications
• Point-of-load regulation modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix MB3R indicates the fixed 3.3 V output variant. Confirm the FCRLF-EP-14 package type matches your PCB footprint requirements. Ensure thermal design accounts for the exposed pad connection. Check humidity sensitivity levels if storage conditions exceed specified limits. Validate that the input voltage does not exceed the 36 V maximum rating during transient events.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output at 3 A is required within a small form factor. The 2.2 MHz frequency allows for smaller external inductors and capacitors compared to lower frequency alternatives. Consider the thermal performance of the VQFN package for high-current applications. Verify compatibility with the system's input voltage range of 3 V to 36 V.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR66430 family of wide input voltage synchronous buck converters. The family offers various output voltage options and packaging configurations. The LMR66430 series is designed for applications demanding high efficiency and compact size. It integrates protection features such as overcurrent and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LMR66430 variants with different output voltages or packages, provided the electrical specifications match. Cross-reference with similar 3A synchronous buck converters from Texas Instruments if pinout compatibility is not required.