MP2126DN-LF-Z

Overview

The MP2126DN-LF-Z is a synchronous step-down DC/DC converter manufactured by Monolithic Power Systems. It integrates two high-side N-channel MOSFETs and two low-side N-channel MOSFETs to provide dual independent outputs from a single input source. The device operates with an input voltage range of 4.5V to 28V, delivering up to 2.5A on the primary channel and 1.5A on the secondary channel. It features a fixed switching frequency of 500kHz and supports adjustable output voltages via external feedback resistors. The component is housed in an 8-pin SOIC-EP package and is designed for operation across a temperature range of -40°C to +85°C.

Feature Summary

• Dual independent output channels allowing separate voltage scaling
• Integrated synchronous rectification for improved efficiency
• Fixed 500kHz switching frequency for compact passive design

Applications

• Point-of-load regulation for digital logic supplies
• Battery-powered portable devices requiring multiple voltage rails
• Industrial control systems with isolated or semi-isolated power needs

Procurement Notes

Verify the specific suffix designation against the manufacturer's current datasheet to confirm pinout compatibility and thermal characteristics. Ensure that the ordering information matches the exact package variant required for your PCB footprint. Cross-reference the RoHS compliance status with the latest environmental declarations provided by Monolithic Power Systems prior to final procurement approval.

Selection Notes

Select this component when dual isolated or non-isolated outputs are required from a single input rail without using two separate converters. Evaluate the total output current capability against the load requirements of both channels. Consider the thermal performance of the SOIC-EP package relative to the expected power dissipation in the target application environment.

Part Context

This part belongs to the MPS family of synchronous buck regulators designed for space-constrained applications. It offers a cost-effective alternative to discrete solutions by integrating all necessary power switches and control logic into a single small outline integrated circuit. The series is commonly utilized in consumer electronics and industrial equipment where board real estate is limited.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official replacement guide for equivalent components within the same product family.