LM2853MHX-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2853MHX-3.3 is a synchronous step-down switching regulator manufactured by Texas Instruments, designed for high-efficiency power conversion in compact applications. It integrates high-side and low-side N-channel MOSFETs to deliver a fixed 3.3 V output with a maximum load current of 3 A. The device operates from an input voltage range of 3 V to 5.5 V and supports adjustable switching frequencies up to 725 kHz. Packaged in a 14-pin HTSSOP (MH) thermal pad package, it features comprehensive protection mechanisms including cycle-by-cycle current limiting, thermal shutdown, and soft-start functionality to ensure reliable operation across industrial temperature ranges.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification using internal high-side and low-side N-channel MOSFETs for enhanced efficiency
• Fixed 3.3 V output configuration optimized for standard logic supply rails
• Built-in protection circuitry including thermal shutdown and cycle-by-cycle current limit

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring efficient 3.3 V regulation
• Industrial control systems utilizing 5 V input buses
• Embedded computing modules needing stable low-noise power delivery

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number includes the suffix indicating lead-free status, typically NOPB, as original datasheets may list variants without explicit suffixes in abbreviated forms. Confirm the package type matches the required HTSSOP footprint and thermal pad specifications for PCB layout compatibility. Ensure the operating temperature range meets the specific application requirements, as industrial grades may differ from commercial variants.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from a 3 V to 5.5 V input source with up to 3 A load capability. Consider the integrated synchronous design for superior efficiency compared to asynchronous alternatives. Evaluate the switching frequency options to balance between component size and electromagnetic interference performance. Verify that the thermal performance of the HTSSOP package suits the ambient conditions and power dissipation limits of the target enclosure.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2853 belongs to Texas Instruments' family of 3 A synchronous buck regulators, sharing architectural similarities with the LM2854 which offers higher current capacity. Unlike the LM2854, this variant provides a fixed 3.3 V output rather than an adjustable range. It competes in the market for compact DC-DC converters used in battery-powered devices and point-of-load applications where space constraints and efficiency are critical design parameters.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2853MHX-3.3/NOPB is the confirmed equivalent part number representing the same device with explicit lead-free compliance.