ADP3820AR-4.1

Overview

The ADP3820AR-4.1 is a linear lithium-ion battery charger IC from Analog Devices, designed for single-cell batteries with graphite anodes. It features high charging accuracy of ±1% and low shutdown current. The device operates in the SOIC-N package and supports constant-current/constant-voltage charging profiles suitable for portable electronics.

Feature Summary

• Linear charging architecture optimized for lithium-ion cells
• High precision regulation ensuring stable charge cycles
• Low power consumption in shutdown mode

Applications

• Portable consumer electronics
• Small electronic devices requiring compact power management
• Single-cell lithium-ion battery systems

Procurement Notes

Verify the specific suffix AR-4.1 to confirm compatibility with graphite anode batteries. Check manufacturing status as some listings indicate obsolete status. Ensure the SOIC-N package matches your PCB footprint requirements before procurement.

Selection Notes

Select this component when a simple linear solution is preferred over switching regulators for small form factor designs. Consider the ±1% accuracy requirement and ensure input voltage headroom accommodates the linear regulator's dropout voltage for efficient operation.

Part Context

Part of the ADP3820 family offering voltage options for different anode materials. The AR-4.1 variant specifically targets graphite-based lithium-ion chemistry. It serves as a cost-effective alternative to complex switching chargers in space-constrained applications.

Replacement Considerations

Check ADP3820AR-4.2 for graphite anode variants or ADP3820ARTZ-4.1RL7 for tape-and-reel packaging options. Verify pinout compatibility and thermal performance when substituting.