LTC3554EUD#TRPBF

Power Management - Specialized Overview

The LTC3554EUD#TRPBF is a micropower highly integrated power management and battery charger IC designed for single-cell Li-Ion/Polymer battery applications. It features a PowerPath manager with automatic load prioritization, an ideal diode, and two synchronous step-down switching regulators. The device includes a pushbutton controller and limits input current to 100mA or 500mA. Quiescent current in standby mode is 10μA with all outputs enabled. It operates within a temperature range of -40°C to +85°C and is housed in a 20-pin UTQFN package measuring 3mm × 3mm × 0.55mm.

Power Management - Specialized Feature Summary

• Integrates PowerPath manager with automatic load prioritization for seamless transition between USB and battery power sources
• Includes dual high-efficiency synchronous step-down switching regulators with 200mA output capability
• Features built-in Li-Ion/Polymer battery charger with automatic charge current reduction based on input limits
• Provides ultra-low standby quiescent current of 10μA when all supplies are enabled

Power Management - Specialized Applications

• Single-cell Li-Ion/Polymer battery powered devices
• USB-powered portable electronics
• Mobile communication devices
• Personal digital assistants
• Portable medical instruments

Power Management - Specialized Procurement Notes

Verify the exact part number suffix matches the required package and tape/reel configuration. Confirm the manufacturer source is authorized to ensure component authenticity. Check RoHS compliance status against project requirements. Validate that the specific revision level meets design specifications. Ensure storage conditions align with manufacturer guidelines for moisture-sensitive devices.

Power Management - Specialized Selection Notes

Select this component for designs requiring integrated power path management and battery charging in space-constrained applications. The low standby current makes it suitable for battery-operated devices requiring extended runtime. Verify that the 200mA regulator output current meets system load requirements. Consider the 3mm x 3mm package size for PCB layout constraints. Ensure input voltage ranges match the available power sources.

Power Management - Specialized Part Context

This component belongs to Analog Devices' micropower PMIC family, specifically optimized for USB-powered mobile applications. It combines power management, battery charging, and DC-DC conversion in a single compact package. The integration reduces external component count and simplifies board design compared to discrete solutions using separate chargers and regulators.

Power Management - Specialized FAQ

What is the maximum input current limit supported by the LTC3554?

The LTC3554 automatically limits input current to a maximum of either 100mA or 500mA depending on the USB connection type.

How does the PowerPath manager handle power source transitions?

It provides seamless transition between USB input power and Li-Ion/Polymer battery power with automatic load prioritization.

What is the quiescent current consumption in standby mode?

With all supplies enabled in standby mode, the quiescent current drawn from the battery is only 10μA.