LTC3553EUD-2

Power Management - Specialized Overview

The LTC3553EUD-2 is a micropower USB power manager featuring a Li-ion charger, buck DC/DC converter, and always-on LDO regulator. It operates with an input voltage range of 4.35 V to 5.5 V. The device provides multiple output voltages including 1.2 V, 2.9 V, 3.3 V, and 4.2 V. Output currents vary by voltage: 0.15 A at 3.3 V, 0.2 A at 1.2 V, and 0.5 A for outputs between 2.9 V and 5.5 V or at 4.2 V. The topology is Buck.

Power Management - Specialized Feature Summary

• Integrates a switching battery charger for Li-Ion/Li-Pol batteries
• Includes a synchronous buck DC/DC converter
• Features an always-on low dropout (LDO) regulator

Power Management - Specialized Applications

• Evaluation using Demonstration Circuit 1920A
• USB compatible power management systems
• Li-Ion/Polymer battery applications

Power Management - Specialized Procurement Notes

Verify the specific suffix EUD-2 against official Analog Devices documentation to confirm pinout and electrical characteristics. Ensure compatibility with the intended demonstration circuit, such as DC1920A, if used for evaluation purposes. Confirm RoHS compliance status through current datasheets before integration into final designs.

Power Management - Specialized Selection Notes

Select this component for applications requiring a highly integrated power solution from a USB source. It combines charging, regulation, and management in a single package. Consider the available output current capabilities at different voltage levels when designing the load requirements. Verify that the input voltage range aligns with the USB supply specifications.

Power Management - Specialized Part Context

This part belongs to the LTC3553 series of power management ICs. It is designed for portable devices powered by USB. The device integrates multiple power functions to reduce board space and component count. It is often evaluated using dedicated demonstration boards provided by the manufacturer.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided reference material.