MP26057DQ-LF-Z

Overview

The MP26057DQ-LF-Z is a linear single-cell lithium-ion or lithium-polymer battery charger from Monolithic Power Systems. It features an operating supply voltage range of 3.5 V to 5.5 V and delivers a regulated output voltage of 4.2 V. The device supports a maximum charging current of 1 A and operates within a temperature range of -40°C to +85°C. It utilizes a QFN-10 package with surface mount installation and consumes a typical operating supply current of 200 µA.

Feature Summary

• Linear charging architecture optimized for USB-powered applications
• Integrated safety protections including overvoltage and thermal regulation
• Low quiescent current operation for enhanced power efficiency

Applications

• Portable consumer electronics powered by USB sources
• Single-cell lithium-ion battery management systems
• Lithium-polymer battery charging in compact devices

Procurement Notes

Verify the specific suffix 'Z' indicates RoHS compliance and lead-free status as per manufacturer standards. Confirm the QFN-10 package dimensions match your PCB footprint requirements. Ensure the input voltage source remains within the 3.5 V to 5.5 V operational window to prevent malfunction. Cross-reference the datasheet for thermal pad soldering guidelines to ensure reliable heat dissipation during high-current charging cycles.

Selection Notes

Select this component when designing USB-based chargers requiring a simple linear solution for single-cell Li-Ion or Li-Po batteries. It is suitable for applications where input voltage is close to the battery voltage, minimizing power loss. Consider the 1 A current limit and QFN-10 thermal performance for space-constrained designs. This part is ideal for cost-sensitive portable devices prioritizing simplicity over high-efficiency switching architectures.

Part Context

This device belongs to the MPS MP2605 series of battery charge management ICs. The series focuses on linear charging solutions for single-cell lithium batteries. The MP26057 variant specifically targets lower input voltage ranges compared to other series members like the MP26053, making it distinct for direct USB connection scenarios without boost converters.

Replacement Considerations

MP26053DQ-LF-Z offers similar functionality but supports higher input voltages up to 6.5 V.