LM2853MHX-1.8

Voltage Regulators - DC DC Switching Regulators Overview

The LM2853MHX-1.8 is a synchronous step-down switching regulator manufactured by Texas Instruments, designed for high-efficiency power conversion in space-constrained applications. It integrates a high-side and low-side N-channel MOSFETs to deliver up to 3A of output current with excellent transient response. The device operates from an input voltage range of 2.7V to 5.5V and provides a fixed 1.8V output. It features a programmable switching frequency selectable between 550kHz and 1.4MHz to optimize external component size and efficiency. Integrated protections include overcurrent protection, thermal shutdown, and soft-start functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture utilizing integrated high-side and low-side N-channel MOSFETs for enhanced efficiency across the load range.
• Integrated power stage design eliminates the need for external Schottky diodes, reducing solution footprint and simplifying layout requirements.
• Programmable switching frequency allows optimization of transient response versus efficiency, supporting frequencies up to 1.4MHz.
• Comprehensive protection suite includes cycle-by-cycle current limiting, thermal shutdown, and controlled soft-start to ensure robust operation under fault conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring efficient battery-powered operation
• Embedded systems and microcontroller power supply rails
• Industrial control modules with limited board space constraints

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) against the manufacturer's current datasheet to confirm lead-free compliance and exact package marking. Ensure the ordering part number matches the required output voltage and switching frequency configuration. Cross-reference the package outline drawing with your PCB footprint library to guarantee mechanical compatibility before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, high-efficiency buck converter is needed for inputs up to 5.5V. The fixed 1.8V output suits digital logic supplies directly. Consider the 14-pin HTSSOP package for thermal performance and pin count balance. Evaluate the trade-off between higher switching frequencies for smaller inductors versus increased switching losses if operating near maximum load currents.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM285x family of synchronous buck regulators from Texas Instruments. It shares architectural similarities with the LM2851 and LM2852 but offers distinct current ratings and feature sets tailored for different power density requirements. The MHX suffix indicates a specific tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2853MHX-1.8/NOPB for identical specifications with explicit lead-free confirmation. Other variants within the LM2853 series may offer different fixed output voltages or switching frequency options while maintaining the same pinout and thermal characteristics.