MP2603EJ-LF-Z

Overview

The MP2603EJ-LF-Z is a linear single-cell lithium-ion/polymer battery charger IC manufactured by Monolithic Power Systems. It supports a maximum charging current of 150mA and provides a regulated output voltage of 4.2V for the battery cell. The device operates within a supply voltage range of 3.5V to 5.25V and features programmable charge current control. It includes comprehensive safety mechanisms such as overcurrent protection and thermal regulation to ensure reliable operation across an ambient temperature range of -20°C to +85°C.

Feature Summary

• Linear architecture designed for efficient single-cell lithium-ion or polymer battery charging applications
• Integrated thermal regulation and overcurrent protection to maintain safe operating conditions
• Programmable constant-current charging capability with automatic termination upon full charge

Applications

• Portable consumer electronics requiring compact power management solutions
• Wearable devices with limited space for battery charging circuitry
• Small form-factor IoT sensors utilizing single-cell lithium batteries

Procurement Notes

Verify component authenticity through authorized distribution channels to avoid counterfeit risks. Confirm package integrity, specifically the TSOT-23-5 marking, matches official datasheet specifications. Ensure environmental compliance documentation aligns with project requirements. Cross-reference ordering suffixes to confirm lead times and availability status before finalizing procurement plans.

Selection Notes

Select this component when a low-component-count solution for small-capacity single-cell batteries is required. The linear topology suits applications where input voltage does not significantly exceed battery voltage. Consider the 150mA current limit for smaller battery capacities. Evaluate thermal performance in enclosed designs due to linear dissipation characteristics compared to switching alternatives.

Part Context

This part belongs to the MP2603 series of battery chargers from Monolithic Power Systems. It complements higher-current variants like the MP2604 and MP26023 which offer different packages and current capabilities. The TSOT-23-5 package distinguishes it from larger QFN options in the broader portfolio, targeting ultra-compact design constraints.

Replacement Considerations

MP2603EJ-LF-P serves as a direct packaging alternative within the same manufacturer line.