LM2853MHX-1.5

Voltage Regulators - DC DC Switching Regulators Overview

The LM2853MHX-1.5 is a synchronous buck regulator manufactured by Texas Instruments, designed for high-efficiency power conversion in compact form factors. It integrates high-side and low-side N-channel MOSFETs to minimize external component count and reduce solution size. The device operates with an adjustable switching frequency up to 725 kHz, allowing for the use of small inductors and capacitors. It features a fixed internal reference voltage of 1.5 V, which sets the output voltage via an external resistor divider. The regulator supports input voltages ranging from 2.95 V to 5.5 V and delivers a continuous output current of 3 A. It includes comprehensive protection features such as cycle-by-cycle current limiting, thermal shutdown, and soft-start functionality to ensure reliable operation under various load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side N-channel MOSFETs for efficient synchronous rectification
• Supports adjustable switching frequencies up to 725 kHz to optimize passive component size
• Includes built-in cycle-by-cycle current limiting and thermal shutdown for robust protection
• Features programmable soft-start to limit inrush current during startup

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded processors and FPGAs
• Power supply stages for industrial control systems
• Battery-powered portable equipment requiring high efficiency
• Communication infrastructure base stations

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., MHX) against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure that the ordering part number matches the required temperature range and pin configuration. Cross-reference with the latest revision history to account for any changes in electrical characteristics or recommended operating conditions before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, high-current synchronous buck solution is required for inputs between 3 V and 5.5 V. Consider the 725 kHz maximum switching frequency if minimizing inductor size is a priority. Evaluate the need for external compensation components based on the desired transient response and stability requirements. Compare with non-synchronous alternatives if cost is the primary constraint and efficiency demands are lower.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2853 belongs to Texas Instruments' family of synchronous step-down converters, designed to replace traditional PWM controllers with integrated power switches. This series targets applications demanding high power density and efficiency. The MHX variant specifically denotes a heat-enhanced thin QFN package, suitable for surface-mount assembly where thermal performance and board space are critical constraints compared to larger packages.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2853MHX-1.2/NOPB and LM2853MHX-2.5/NOPB from the same family, which share identical pinouts and control interfaces but differ in fixed output voltage references. Verify that the alternative part's output voltage matches the system requirement or adjust the feedback network accordingly.