LTC4121EUD-4.2#TRPBF

Battery Chargers Overview

The LTC4121EUD-4.2#TRPBF is a synchronous step-down battery charger manufactured by Analog Devices Inc., designed for lithium-ion and lithium-polymer cells. It operates with an input voltage range up to 40V and delivers a constant charge current of 400mA. The device features a fixed 4.2V output voltage, suitable for single-cell applications. It utilizes a 16-WFQFN package with an exposed pad for surface mount installation. The component supports operation across a junction temperature range of -40°C to +125°C.

Battery Chargers Feature Summary

• Integrates synchronous step-down topology for efficient charging
• Provides constant-current/constant-voltage (CC/CV) regulation
• Supports wide input voltage range up to 40V

Battery Chargers Applications

• Lithium-ion battery charging in portable electronics
• Lithium-polymer cell management systems
• Compact power supply designs requiring high efficiency

Battery Chargers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the 4.2V output variant matches the target battery chemistry requirements. Ensure the 16-WFQFN footprint aligns with the PCB layout specifications. Check for RoHS compliance status as indicated in official documentation.

Battery Chargers Selection Notes

Select this component for applications requiring a compact solution for single-cell Li-ion or Li-Po batteries. The 400mA current rating suits low-power devices. The wide input voltage capability allows flexibility in system design. Ensure thermal management accounts for the exposed pad requirement in the 16-WFQFN package.

Battery Chargers Part Context

This part belongs to the LTC4121 series of battery chargers from Analog Devices. It is distinct from other variants like the standard LTC4121 by its fixed 4.2V output setting. The series focuses on integrating power switches and control logic into a small form factor for space-constrained designs.

Battery Chargers Replacement Considerations

Consult official Analog Devices documentation for direct pin-compatible substitutes within the LTC4121 family. Verify that any alternative maintains the 40V input limit and 400mA output current specification.