MP26075EQ-41-LF-P

Overview

The MP26075EQ-41-LF-P is a high-efficiency linear cradle charger designed for single-cell lithium-ion or lithium-polymer batteries. It operates with an input voltage range of 2.2 V to 6.3 V and provides a fixed output voltage of 4.2 V. The device supports a maximum charge current of 1 A and dissipates up to 2.5 W of power. It functions within a temperature range of -20 °C to +85 °C and is housed in a compact QFN-10 (3 mm x 3 mm) surface-mount package.

Feature Summary

• Controls AC adapter output voltage relative to battery voltage to maximize charging efficiency in cradle applications
• Provides low pre-charge current specifically optimized for deeply discharged batteries
• Manages power-up sequencing by boosting the AC adapter first to suppress insertion surge currents
• Includes comprehensive safety features such as battery temperature monitoring, overvoltage protection, and fault indication

Applications

• AC adapter-powered cradle chargers for portable devices
• Single-cell lithium-ion battery management systems
• Lithium polymer battery charging stations
• Consumer electronics docking stations requiring efficient linear charging

Procurement Notes

Verify the specific suffix LF-P against official Monolithic Power Systems documentation to confirm lead-free status and tape-and-reel packaging configuration. Ensure compatibility with the target application's thermal requirements given the 2.5 W power dissipation limit. Confirm that the 4.2 V fixed output aligns with the connected battery cell specifications before integration.

Selection Notes

Select this component when designing a cradle-style charger where high efficiency is required without the complexity of switching regulators. It is suitable for applications powered directly by AC adapters within the 2.2 V to 6.3 V range. The QFN-10 package is ideal for space-constrained designs. Ensure the system can handle the thermal load associated with linear regulation at higher input-to-output voltage differentials.

Part Context

This part belongs to the MP26075 series of high-efficiency linear cradle chargers from Monolithic Power Systems. The series is engineered to improve energy efficiency in charging docks by dynamically managing the relationship between the AC adapter input and the battery voltage. The MP26075EQ-41-LF-P specifically denotes the version with a 4.2 V output and Pb-free reel packaging.

FAQ

How does the MP26075 improve efficiency compared to standard linear chargers?

It actively controls the AC adapter output voltage to track the battery voltage, reducing the voltage drop across the internal pass element and thereby minimizing power loss.

What protection mechanisms are included for safe operation?

The device includes input/output overvoltage protection, overtemperature protection, battery temperature monitoring, charging timeout timers, and fault indication outputs.