LM2853MHX-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2853MHX-1.8/NOPB is a synchronous step-down DC/DC converter manufactured by Texas Instruments, designed for high-efficiency power management in space-constrained applications. This device integrates high-side and low-side N-channel MOSFETs to deliver up to 3A of output current with minimal external component requirements. It operates from an input voltage range of 2.7V to 6V and provides a fixed 1.8V output. The regulator supports adjustable switching frequencies between 400kHz and 2.2MHz, allowing optimization for size or efficiency. Key features include integrated soft-start, cycle-by-cycle current limiting, thermal shutdown, and a Power Good indicator. It is housed in a compact 14-pin HTSSOP package suitable for surface-mount assembly.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification with internal high-side and low-side N-channel MOSFETs for high efficiency
• Fixed 1.8V output voltage option eliminating the need for external feedback resistors
• Adjustable switching frequency ranging from 400kHz to 2.2MHz for design flexibility
• Comprehensive protection mechanisms including thermal shutdown, cycle-by-cycle current limit, and soft-start

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics such as smartphones and tablets
• Industrial control systems requiring stable low-voltage rails
• Embedded computing modules and single-board computers
• Battery-powered devices needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact part number suffix against the manufacturer's latest datasheet to ensure compatibility with RoHS standards and lead-free manufacturing processes. Confirm that the HTSSOP-14 package dimensions match your PCB footprint specifications. Check for any recent product change notices (PCNs) regarding mold compound or qualification updates. Ensure ordering quantities align with standard reel sizes if applicable. Cross-reference with authorized distributors to confirm authenticity and supply chain integrity.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8V output is required without external resistor networks. Consider the adjustable frequency range to balance electromagnetic interference (EMI) performance against passive component size. Evaluate the 3A current capability against peak load demands to ensure adequate thermal headroom. Compare input voltage ranges with your system's power source to verify operation within the 2.7V to 6V window. Assess package thermal performance relative to your enclosure constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2853 series belongs to Texas Instruments' family of synchronous buck regulators designed for portable and industrial applications. It complements other variants like the LM2853MHX-2.5/NOPB and LM2853MHX-3.3/NOPB, which offer different fixed output voltages. The 'MHX' suffix denotes the specific HTSSOP-14 package and tape-and-reel packaging. The '/NOPB' indicates a non-lead-based finish compliant with environmental directives. This series shares architectural similarities with the LM2854 but offers lower current capacity and input voltage ranges.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements may include LM2853MHX-1.8 or LM2853MHX-1.8/NOPB from Texas Instruments. Verify electrical parameters such as switching frequency and current limits before substitution. Alternative packages like SOIC or QFN may require schematic and layout modifications. Consult the manufacturer's cross-reference tools for qualified equivalents.