LTC3455EUF#TRPBF

Power Management - Specialized Overview

The LTC3455EUF#TRPBF is a dual DC/DC converter integrated circuit manufactured by Analog Devices Inc., designed for portable applications. It features two synchronous step-down converters operating at a fixed 1.2MHz switching frequency, enabling the use of small inductors and capacitors. The device includes an integrated Li-Ion battery charger with selectable charge termination modes and a USB power manager that controls upstream port detection and downstream current limits. It operates from a single supply voltage ranging from 2.7V to 5.5V and supports input voltages up to 6V. The IC is housed in a 24-lead QFN package.

Power Management - Specialized Feature Summary

• Integrates dual synchronous step-down DC/DC converters with fixed 1.2MHz switching frequency
• Includes dedicated Li-Ion battery charger with programmable charge termination options
• Features USB power manager for upstream port detection and downstream current limiting
• Supports low component count design through high-frequency operation

Power Management - Specialized Applications

• Handheld mobile devices
• USB-powered portable electronics
• Li-Ion battery powered systems
• Small form factor consumer gadgets

Power Management - Specialized Procurement Notes

Verify the exact part number suffix and manufacturer lot codes upon receipt. Confirm RoHS compliance status as indicated on the datasheet. Check for any product change notifications (PCN) that may affect pinout or electrical characteristics. Ensure storage conditions meet manufacturer specifications to prevent moisture sensitivity issues prior to reflow soldering.

Power Management - Specialized Selection Notes

Select this component when designing space-constrained portable devices requiring simultaneous power management for logic loads and battery charging. The integrated USB manager simplifies connectivity design. Consider thermal performance due to the compact QFN package. Verify that the 1.2MHz frequency aligns with EMI requirements and available passive component sizes for the specific application environment.

Power Management - Specialized Part Context

This part belongs to the LTC3455 family of power management ICs from Analog Devices. It combines multiple power functions into a single solution to reduce board space. The series is targeted at mobile and handheld markets where efficiency and size are critical. Other variants in the family may offer different output configurations or packaging options.

Power Management - Specialized Replacement Considerations

Direct replacements must match the dual buck topology, USB power management features, and Li-Ion charging capabilities. Verify pin compatibility with the 24-lead QFN package. Check if alternative parts support the same 1.2MHz frequency and input voltage range. Consult manufacturer cross-reference tools for qualified equivalents.