MP26121DQ-LF-Z

Overview

The MP26121DQ-LF-Z is a linear charge management IC designed for single-cell lithium-ion and lithium-polymer batteries. It operates within an input voltage range of 3.5 V to 6.5 V and delivers a regulated charging current of 1 A. The device provides a precise output voltage of 4.2 V. Packaged in a QFN-10 format, it supports surface-mount installation. This component integrates NTC thermistor monitoring for battery temperature protection during the charging cycle.

Feature Summary

• Linear topology with integrated NTC thermistor monitoring for thermal safety
• Supports single-cell Lithium-ion and Lithium Polymer battery chemistries
• Compact QFN-10 package suitable for space-constrained designs

Applications

• Portable consumer electronics requiring single-cell power sources
• Wearable devices with limited board space
• Battery-powered medical instruments

Procurement Notes

Verify the specific suffix against official Monolithic Power Systems documentation to confirm pinout compatibility and thermal characteristics. Ensure the design accommodates the linear regulator's heat dissipation requirements at the specified 1 A load. Confirm RoHS compliance status through the manufacturer's environmental declarations before finalizing procurement specifications.

Selection Notes

Select this component when a simple linear solution is preferred over switching regulators for low-noise applications. It is appropriate for systems where the input voltage remains close to the battery voltage to minimize power loss. Consider the QFN-10 footprint constraints and verify that the PCB layout supports adequate thermal grounding for the exposed pad.

Part Context

This part belongs to the MPS MP26121 series of battery chargers. It serves as a specialized linear charger alternative to more complex switching architectures. The series targets applications prioritizing circuit simplicity and reduced electromagnetic interference over maximum energy efficiency.

Replacement Considerations

MP26121DQ-LF-P is a parameter-equivalent variant available in cut-tape packaging.